My Long List of Amplifiers and My Personal Review of Each!


So I have been in a long journey looking to find the best amplifiers for my martin logan montis. As you know, the match between an amplifier and speakers has to be a good "marriage" and needs to be blend exquisitely. Right now, I think I might have found the best sounding amplifier for martin logan. I have gone through approximately 34-36 amplifiers in the past 12 months. Some of these are:

Bryston ST, SST, SST2 series
NAD M25
PARASOUND HALO
PARASOUND CLASSIC
KRELL TAS
KRELL KAV 500
KRELL CHORUS
ROTEL RMB 1095
CLASSE CT 5300
CLASSE CA 2200
CLASSE CA 5200
MCINTOSH MC 205
CARY AUDIO CINEMA 7
OUTLAW AUDIO 755
LEXICON RX7
PASS LABS XA 30.8
BUTLER AUDIO 5150
ATI SIGNATURE SERIES 6005

With all that said, the amplifiers I mentioned above are the ones that in my opinion are worth mentioning. To make a long story short, there is NO 5 CHANNEL POWER AMP that sounds as good as a 3ch and 2ch amplifier combination. i have done both experiments and the truth is that YOU DO lose details and more channel separation,etc when you select a 5 channel power amplifier of any manufacturer.
My recollection of what each amp sounded like is as follows:

ATI SIGNATURE SERIES 6005 (great power and amazing soundstage. Very low noise floor, BUT this amplifiers NEEDS TO BE cranked up in order to fully enjoy it. If you like listening at low volume levels or somewhat moderate, you are wasting your time here. This amp won’t sound any different than many other brands out there at this volume. The bass is great, good highs although they are a bit bright for my taste)

NAD M25 (very smooth, powerful, but somewhat thin sounding as far as bass goes)
Bryston sst2(detailed, good soundstage, good power, but can be a little forward with certain speakers which could make them ear fatiguing at loud volumes)

Krell (fast sounding, nice bass attack, nice highs, but some detail does get lost with certain speakers)

rotel (good amp for the money, but too bright in my opinion)

cary audio (good sound overall, very musical, but it didn’t have enough oomph)

parasound halo (good detail, great bass, but it still holds back some background detail that i can hear in others)

lexicon (very laid back and smooth. huge power, but if you like more detail or crisper highs, this amp will disappoint you)

McIntosh mc205 (probably the worst multichannel amp given its price point. it was too thin sounding, had detail but lacked bass.

butler audio (good amplifier. very warm and smooth sweet sounding. i think for the money, this is a better amp than the parasound a51)

pass labs (very VERY musical with excellent bass control. You can listen to this for hours and hours without getting ear fatigue. however, it DOES NOT do well in home theater applications if all you have is a 2 channel set up for movies. The midrange gets somewhat "muddy" or very weak sounding that you find yourself trying to turn it up.

classe audio (best amplifier for multi channel applications. i simply COULDNT FIND a better multi channel amplifier PERIOD. IT has amazing smoothness, amazing power and good bass control although i would say krell has much better bass control)

Update: The reviews above were done in January 2015. Below is my newest update as of October 2016:



PS AUDIO BHK 300 MONOBLOCKS: Amazing amps. Tons of detail and really amazing midrange. the bass is amazing too, but the one thing i will say is that those of you with speakers efficiency of 87db and below you will not have all the "loudness" that you may want from time to time. These amps go into protection mode when using a speaker such as the Salon, but only at very loud levels. Maybe 97db and above. If you don’t listen to extreme crazy levels, these amps will please you in every way.

Plinius Odeon 7 channel amp: This is THE BEST multichannel amp i have ever owned. Far , but FAR SUPERIOR to any other multichannel amp i have owned. In my opinion it destroyed all of the multichannel amps i mentioned above and below. The Odeon is an amp that is in a different tier group and it is in a league of its own. Amazing bass, treble and it made my center channel sound more articulate than ever before. The voices where never scrambled with the action scenes. It just separated everything very nicely.

Theta Dreadnaught D: Good detailed amp. Looks very elegant, has a pleasant sound, but i found it a tad too bright for my taste. I thought it was also somewhat "thin" sounding lacking body to the music. could be that it is because it is class d?

Krell Duo 300: Good amp. Nice and detailed with enough power to handle most speakers out there. I found that it does have a very nice "3d" sound through my electrostatics. Nothing to fault here on this amp.
Mark Levinson 532H: Great 2 channel amp. Lots of detail, amazing midrange which is what Mark Levinson is known for. It sounds very holographic and will please those of you looking for more detail and a better midrange. As far as bass, it is there, but it is not going to give you the slam of a pass labs 350.5 or JC1s for example. It is great for those that appreciate classical music, instrumental, etc, but not those of you who love tons of deep bass.

 It is articulate sounding too
Krell 7200: Plenty of detail and enough power for most people. i found that my rear speakers contained more information after installed this amp. One thing that i hated is that you must use xlr cables with this amp or else you lose most of its sound performance when using RCA’s.

Krell 402e: Great amp. Very powerful and will handle any speaker you wish. Power is incredible and with great detail. That said, i didn’t get all the bass that most reviewers mentioned. I thought it was "ok" in regards to bass. It was there, but it didn’t slam me to my listening chair.

Bryston 4B3: Good amp with a complete sound. I think this amp is more laid back than the SST2 version. I think those of you who found the SST2 version of this amp a little too forward with your speakers will definitely benefit from this amp’s warmth. Bryston has gone towards the "warm" side in my opinion with their new SST3 series. As always, they are built like tanks. I wouldn’t call this amp tube-like, but rather closer to what the classe audio delta 2 series sound like which is on the warm side of things.

Parasound JC1s: Good powerful amps. Amazing low end punch (far superior bass than the 402e). This amp is the amp that i consider complete from top to bottom in regards to sound. Nothing is lacking other than perhaps a nicer chassis. Parasound needs to rework their external appearance when they introduce new amps. This amp would sell much more if it had a revised external appearance because the sound is a great bang for the money. It made my 800 Nautilus scream and slam. Again, amazing low end punch.

Simaudio W7: Good detailed amp. This amp reminds me a lot of the Mark Levinson 532h. Great detail and very articulate. I think this amp will go well with bookshelves that are ported in order to compensate for what it lacks when it comes to the bass. That doesn’t mean it has no bass, but when it is no Parasound JC1 either.
Pass labs 350.5: Wow, where do i begin? maybe my first time around with the xa30.8 wasn’t as special as it was with this monster 350.5. It is just SPECTACULAR sounding with my electrostatics. The bass was THE BEST BASS i have ever heard from ANY amp period. The only amp that comes close would be the jC1s. It made me check my settings to make sure the bass was not boosted and kept making my jaw drop each time i heard it. It totally destroyed the krell 402e in every regard. The krell sounded too "flat" when compared to this amp. This amp had amazing mirange with great detail up top. In my opinion, this amp is the best bang for the money. i loved this amp so much that i ended up buying the amp that follows below.

Pass labs 250.8: What can i say here. This is THE BEST STEREO AMP i have ever heard. This amp destroys all the amps i have listed above today to include the pass labs 350.5. It is a refined 350.5 amp. It has more 3d sound which is something the 350.5 lacked. It has a level of detail that i really have never experienced before and the bass was amazing as well. I really thought it was the most complete power amplifier i have ever heard HANDS DOWN. To me, this is a benchmark of an amplifier. This is the amp that others should be judged by. NOTHING is lacking and right now it is the #1 amplifier that i have ever owned.

My current amps are Mcintosh MC601s: i decided to give these 601s a try and they don’t disappoint. They have great detail, HUGE soundstage, MASSIVE power and great midrange/highs. The bass is great, but it is no pass labs 250.8 or 350.5. As far as looks, these are the best looking amps i have ever owned. No contest there. i gotta be honest with you all, i never bought mcintosh monos before because i wasn’t really "wowed" by the mc452, but it could have been also because at that time i was using a processor as a preamp which i no longer do. Today, i own the Mcintosh C1100 2 chassis tube preamp which sounds unbelievable. All the amps i just described above have been amps that i auditioned with the C1100 as a preamp. The MC601s sound great without a doubt, but i will say that if you are looking for THE BEST sound for the money, these would not be it. However, Mcintosh remains UNMATCHED when it comes to looks and also resale value. Every other amp above depreciates much faster than Mcintosh.

That said, my future purchase (when i can find a steal of a deal) will be the Pass labs 350.8. I am tempted to make a preliminary statement which is that i feel this amp could be THE BEST stereo amp under 30k dollars. Again, i will be able to say more and confirm once i own it. I hope this update can help you all in your buying decisions!


128x128jays_audio_lab
It’s not the mids or highs bursting out. It’s the bass that doesn’t follow...that disjointed bass this specific speaker ( Alexia 1) is known for.

Why do you think those need a full team of Wilson golden ears to set up, as opposed to the Focals that just fit in easily...
Heard the Alexias with a Boulder 1160 amp and 1110 preamp (dCS Vivaldi DAC). Sound was incredible. I had previously heard the DAW and Spectral in the same space and was unimpressed. Wilson with Boulder was amazing. Transparent cabling. 
Quick impressions of the Alexia :

- wide and deep presentation
- mids are locked dead center even when speakers are not perfectly positioned 
- mid bass is all there unlike most speakers 
- deep muscular bass that makes your chair vibrate when pushed hard 
- warmer sounding than focal scala evo but still contains detail 
- extremely dynamic which almost startles you 
- very "real" sounding when tbe recording calls for it 
- it can present big issues for those of you without a room with sufficient size which allows you to put them 4-5 feet into the room

So this right now is a tough call because on some songs the focal sounds tighter and more controlled and in other songs the Alexia sounds more real and lifelike. Right now I can say it might have to do with the music genre that you listen to. If you want slam and extreme dynamics then Wilson takes it. If you want incredible resolution and tons of detail then focal takes it. 
Tomorrow my shootout will be with all sorts of music so that no speaker is at an advantage. The goal is to make it as fair as possible. 
By the way, I have spoken to Wilson audio in regards to the Alexia 1 and all the comments that people are making about it not being a coherent speaker and their response was that most people don't use the right amps with this speaker. This speaker drops to 1.9 ohms at 83 hz so it's not an easy load at all. This is the reason why the Alexia 2 needed to be more efficient because a lot of people refused to buy the right amps for the Alexia 1.  If I were to give my input, I don't here anything incoherent with it. More to come.
RIAA,
If you read carefully, I said, "spending big money for poorer real performance." I bet that in your successful career as a financial advisor/manager, you got clients into many good investments that were undervalued so they could later make good profits. The fact is that in audio, there are very few items that are true investments. The only investment value is if they provide long term enjoyment so you don’t care if they depreciate. The challenge is to get maximum enjoyment without blowing too much money. WC has good financial management by buying low, so he can survive another day to go for the next thing, just as an investor tries to buy low so he can preserve his capital. In that respect WC and I are similar. If I do find something for $30,000 that is truly superior, I won’t bother spending (wasting) $10,000 on something else which is merely good, although for $1,600 I got a near new Mytek Brooklyn Amp which beats almost anything I heard at home for much more money. But everyone has practical spending limits on audio in view of all the other pleasures of life. Even Bill Gates doesn’t have enough money for ALL the good causes he would like to support, so he makes his choices.

It is better to engage in productive positive conversation rather than return insults. Please take the hint, and thanks for listening.

Umm....Not a Financial advisor/manager. I manage millions of dollars of friends/family money for FREE...not as an occupation. Been retired for over a decade (from I/T).

Hard to be positive in regards to your comments cause you just keep beating people over the head with the same redundant crap for almost 2 years now. Its also the reason so many people that USE to be involved in this thread have since moved on. Same ol same ol....Your the expert at everything with no practical use of any of the components mentioned. All you have is theory. You have the wisdom of somebody that has memorized the entire book "Kama Sutra" without ever actually partaking in any of the "events" in real life.

Well, actually, memorizing the Kama Sutra is a pretty cool trick in itself.
re:  Nordost Jumpers

Sorry to jump in a little late on the topic as I've been traveling.  I have had extensive experience with Jumpers using a couple of different Nordost speaker cables and even more when working with another "participant" on this thread who has even higher end Nordost than myself.  

With Nordost, it is absolutely critical that the jumpers are at same or better level than the speaker cables themselves.  I have theories as to why this is, but I could not technically argue them against people on this site that know much more about this than myself.  

What I can say is that I had basic Nordost jumpers and Frey 1 speaker cables (Heimdahl IC) with excellent results.  Which posts were jumped allowed me to slightly adjust tone and "impact" of the system but all ways sounded musical.  When I upgraded my system to all Valhalla 1 the overall sound of the system deteriorated dramatically, even though I preferred some aspects of presentation.  The harshness, or thinness that some people attribute to Nordost was very present.  I tried jumping highs, lows and cross jumping the way that Nordost recommends.  Nothing seemed to help.

I was about to just resell the V1 s but in a last ditch effort, I bought a pair of Reference jumpers.  Instantly, the issues went away.  The overall sound and musicality leapt past the Frey level.  Now all of the detail and clarity that Nordost is known for was matched with bass response, depth and coherence that makes for fantastic, uncolored and unfatiguing listening experience.  Some months later, I had the opportunity to land a pair of Valhalla 1 jumpers so that mains and jumpers were identical.  Although I did not expect that it would or could get better, there was a significant improvement to all aspects of the sound.  Not bad vs. good, but more very good vs better.  Additionally, which posts were jumped became more or less inconsequential.  I have heard from close friends that have Odin 1 and Valhalla 2 speaker cabling and they have had similar results.  

WC, my dealer is a Wilson and a Nordost rep.  They have the same experiences.  Because of the incredible attention placed on time coherence with Wilson, I expect that the sensitivity to the jumpers to be heightened even over my own (ProAc Response 5).   Our friend, who listens to incredibly fast YG speakers has heard a significant improvement from going from Reference to Valhalla 2 jumpers.  

As you know, my system is not nearly at the overall level of what yours is, but my experience is that the better the system, the more important these seemingly unimportant details become.  Again, I can't explain why it is the case, but only that I have found it to be the case in several situations.  I think it is particularly true once you start playing at the V2 and Odin levels.
WC with your room being 22ft long I would suggest you pull the speakers out into the room to around 7ft and move one of the C4 to the opposite side equal to the other balancing your side reflections.
Ok guys ,
The alexias have been professionally set up today. Take a look at the main picture of my virtual system. They spent about 3 hours today setting up which included  moving other stuff around. This  is why you don't see the dynaudios anymore. This is going to be an interesting shootout later on today. Stay tuned. 
RIAA,
I tried to engage in a dignified conversation with you, but you missed the point, still hurl insults, and are incorrect about "All you have is theory."
Psnyder +1 
"the better the system, the more important these seemingly unimportant details become" 

every single part of a cable whether it is power cable or IC or speaker and its structure, the ends, the jumpers, the contact area and contact material all combine and slight differences can be heard if one cares to do the trials. They show up in unexpected changes that one believes are first and foremost the components themselves.      
Glad to hear you finally had your speakers professionally set up, they look great.Whats the final measurements from the front wall , side walls and toe in.

Im sure your next report will be how incredible they sound.
Not sure if I missed something, but unless I'm mistaken - Wilson speakers only have 1 set of speaker wire posts - at least all of mine did / do.

Speakers are 6 ft from the front wall, 4 feet from the sides and 11 feet away from my ears. They sound incredible with my front end. Those of you who critized the Alexia 1 for being boomy, incoherent or broken are beyond wrong on many counts. This is the speaker where cheap amps, preamps and cables are not accepted. It’s either you have the front for this speaker or you don’t buy it. If you try crap, they will make sure you feel like they are the worst speaker you’ve heard in your life. There’s no shortcuts with the Alexia 1 period. In short , they are the best speakers I've heard in my room. 
Boomy could also be contributed to the speakers not being set up properly.

As far has being the best speakers you have heard in your room, they are also the only speakers you had professional set up so its not quite fair to the rest you have had.
WC what preamp were you running, any comparisons between the boulder and pass.
Sure , thats fairly easy. Boulder killed pass xp30. No contest. Xp30 sounded congested in comparison. 
WC

Your speakers finally look like they’re set up correctly but I’m sure Viper6 will tell you the professionals got it all wrong since they’re more than 5’ apart. 
technic is right  Imagine  how a pair of Maestro Evo professionally set up with better tweeter and diver would sound like...
Ok here we go:
Focal scala evo PROS
Clarity and detail in spades
Tight & agile bottom end
Incredible imaging
Sounds great even if you’re just streaming music from your phone. Yes it really does !
Not a big issue to position them in the room due to the nice adjustments on the back of the speaker.
I recommend tubes or class A for these speakers.


Wilson Alexia 1 PROS
Huge sound
Extremely organic sounding with an amazing level of realism
Bass that rivals most subwoofers out there
Dynamic has hell with explosiveness
Smooth and comfortable at any volume level
Instruments are suspended in the air
They disappeared completely in my room
They are chameleons that sound huge when the song calls for it or can turn into bookshelf speakers if that’s what the music is telling them to do.
I recommend you pawn most of your gear and get serious artillery for these. No shortcuts here

Focal scala evo CONS:
High resolution also means that it can get somewhat edgy when pushed hard

If you are a rock fan, you can enjoy them but not at loud levels

If you have a tendency to get ear ringing with loud or long listening sessions , this might not be the speaker for you. On the other hand, those of you with "older ears " might love this tweeter due to the extra detail this tweeter delivers. Also, those of you who do a lot of low level listening will totally dig the sparkle this tweeter has.

They scale very nicely but not to the same degree as the Alexia.

At this level, no speaker will forgive you with piss poor electronics so although this speaker will sound very good with average electronics, you won’t untap its potential until you invest in better electronics.


Wilson Alexia CONS:
BASS will command your attention but in the wrong room it will be a recipe for disaster

This is not the speaker for those of you living in an apartment. It will piss the hell out of your neighbors because the bass will travel through the walls.

They need space and are tricky to set up. Don’t pretend to be a damn expert in regards to speaker placement just because you have positioned Logans , yg, magico, b&w etc.

If you show up with electronics the likes of bhk, parasound, classe, emotiva, Rotel, etc , you will soon hate these speakers.

If you are annoyed by bass or a muscular presentation then stay away.

If you stream a lot of tidal, you will actually hear the difference between streaming and playing a cd which you might hate because you will hear the quality of a well recorded cd and how superior it is vs streaming. (The Scala Evo sounded good with both and you couldn’t tell much of a difference between a CD and streaming )

With all this said , I did a lot of listening today and tried both preamps, 2 other sets of speaker cables and had a few people over helping out. No matter what we played , what cable, what preamp, the focal always sounded great and the Alexia just went about its business by showing you what all these changes were doing to your music. It was easier to dissect changes on your front end using the Alexias which I really liked.
We also felt that the Alexia was always more engaging or that it just drew you into the music much quicker than the focal did. There was also the feeling that the Scala Evo is like an m60 machine gun by the way it fired so rapidly at you and the Alexia is a 50 caliber machine gun that just blasts harder and for longer distances but it is a big gun that needs to be mounted on a vehicle to be able to shoot it because of its power that can send you flying with its kick.

Finally, after taking everything else above in consideration I have decided that the Alexia will be the speaker that I will roll forward with. This means that next year I will need to be patient to see if I can score a pair of ALEXX ? We shall see what the future holds.

Tomorrow I will give my impressions of the xp30 vs boulder 2010. For now, I will go back to listening to more music. 
So WC, you lived with the Neoliths for over a year and loved them....have these mid-level and dated Wilsons already surpassed the Neos in your all time speaker hierarchy?

Great review so far - just waiting for V to pipe in and explain to all of us why the Wilsons can’t be as good as WC is telling us they are (based on theory of course or on properties WC should be valuing more but isn’t)
“In short , they are the best speakers I've heard in my room.”

Oops, I guess you already crowned the Wilson’s the kings, assuming by “my room” you mean to encompass your entire journey. 
Let’s see how they stand the test of time since it’s super early. There have been other components that on day 1 you’ve said were amazing but then they fade away quickly without much further praise - but the neo’s certainly were not in that category as you repeatedly praised them as the best over your year of ownership. Until now ....
Will the mid-level Wilson’s hold the perch as long?  Doubtful given the turnover but who knows?
WC, I've been lurking and following your journey since the beginning, but this is my first post.  Have you spiked the Alexia's yet?  If not, I encourage you to do so as they will be even that much better in terms of bass, focus, clarity and cohesiveness.  At least that has always been my experience with owning Wilson's.

Keep up the fun, it's enjoyable to follow!

Regards,

Dave
WC,
I appreciate your comparisons and analysis which are chock full of wisdom.  Thanks.
briano,
Professionals may bring valid measurements and one set of good ears to the table.  But there is always the matter of individual taste.  I happen to prefer the clarity of closer R/L positioning with toe-in so all drivers are firing at my ears, but realize that I am getting a smaller width soundstage.  Other listeners value a wider soundstage, and speakers closer to the walls which gives more bass if they want that.

I agree about the importance of the best electronics you can get.  Everything in the chain is important, and Linn used to say their superior turntable would produce better results on a cheap speaker than another turntable on better speakers.  However, there are more differences between speakers than any other component, so I believe you should get the best speaker you can, and then optimize it with better electronics, etc.  For example, horn lovers can do well with a low power tube amp which probably offers purer sound than high power tube amps.
WCC,  I am glad you got to hear the virtues of the Alexia I’s. They truly are great speakers.  As good as they are, the Alexia II’s are a noticeable  improvement over the I’s.  The challenge is you will have to put out more cheddar for the II’s since they are current. But a worthy investment,  unless you can find a pair of ALEXX’s for a great price - which are a major step up.  Decisions, Decisions 
@kren.
The neoliths were never in my new room so they wouldn’t be included in my statement above. They are still the best I've owned but would the Alexx change that ? 

I have come to the realization that I value a big soundstage and smoothness above everything else. Small sound bores me and does nothing for me. I need to be swallowed completely my the presentation in order for me to stay engaged. 

Soundstage is a great thing. But for me, I value clarity and overtones retrieval even more. I feel soundstage is a more abstract audiophile aspect.

And I sure can’t tolerate a speaker with bass that calls for attention. I find this very annoying.

Oh well the thread is about WC’s journey, not mine , so back to the OP.
WC

Excellent write up comparing the Focals and Wilson speakers. You explained the differences between them quite well. If your moving forward with the Alexia I’s, as far as electronics and cabling go, it will work out well if you eventually move up to a more expensive Wilson speaker. Everything you learn with the Alexia I’s should transfer over to the other models.

Viper6

I’m in full agreement with your last post. I’ll be looking for a therapist first thing tomorrow morning. Lol
For right now I need to stay with Alexia 1 and learn the speaker. It will serve me as a learning tool if I decide to go up the ladder. 
As far as your comment about the bass, I can understand when you say "call attention" because indeed this can be viewed as you describe it , but when I went back to focal I felt like it didn't have tbe same meat on the bones but rather just more detail and imaging but those traits don't keep me on my seat over long listening sessions. I tried and it didn't so this is also about what speaker characters engage you and translate into long listening sessions. Neither one is right or wrong, but rather which one makes you excited to come home to listen. 
briano,
All audiophiles need therapists.  We are all trying to do the impossible, which is trying to get mechanical devices to sound like we have real musicians at our command.  The rich nobility in past centuries had resident musicians, but even they couldn't flip a switch and get musicians to produce on a seconds notice.  Only therapists can help us, LOL.
"I have come to the realization that I value a big soundstage and smoothness above everything else. Small sound bores me and does nothing for me. I need to be swallowed completely my the presentation in order for me to stay engaged."
"At this level, no speaker will forgive you with piss poor electronics so although this speaker will sound very good with average electronics, you won’t untap its potential until you invest in better electronics." 

I think the statements above are very important and provide insight into why you come to some of your conclusions. I too prefer a big soundstage and smoothness over analytical and detailed. Speakers that are overly detailed and laser focused don't sound as real to my ears. As a matter of fact most of them give me headaches! Your second point is one of the big reasons I won't upgrade my speakers. In order you get the most out of the speakers I prefer, I would be required to upgrade everything. I'm willing to accept my current system's weaknesses; because I simply can't afford to upgrade everything to go to the next level.
@ricred1 
You pretty much nailed it on the head. Changing speakers for something better will certainly improve a lot of aspects, but it can present other challenges that you don't have right now. For instance, with the Alexia 1 you get a larger sound, clear, smooth sound without going over the edge, but you also introduce a level of bass that if your current amps can not control the right way then you will introduce overwhelming bottom end. This is what would force you into looking for amps with other strengths. I don't pretend to know it all, but this is MY PERSONAL experience so far. 
So i had a total of 5 people come over over the last 2 days and each and everyone of them said the same thing which was that they have never ever heard anything sound remotely close in my room or living room to what i have put together now. I am actually beyond shocked myself at how good things sound. I can't put it into words that can describe the great feeling i have with entire system as a whole. The synergy, dynamics, speed, explosiveness, muscularity, clarity, layers of detail, zero fatigue, etc, etc, etc. Me saying that i am happy would be an understatement because i am actually FLOORED with how everything is sounding. 
With that out of the way, here are my thoughts of the pass labs xp30 vs boulder 2010:

Pass labs xp30 PROS:
- sounds very lively
-rounded high frequencies which allows you to listen to recordings that are not perfect 
- great punch and meat on the bones when it comes to the lows
- awesome mids that reminds you that this is a class a preamp
- open soundstage 
- not analytical or cold. It is very inviting and works hard to make each song as pleasant as possible 
- excellent bang for the buck

Boulder 2010 Pros:
- clear like water
- Bass control with zero bloat or overhang
- amazing separation and imaging
- it gives you nothing but the facts 
- It will reward you by letting you hear each hard earned dollar you spend in your system
- dynamics are startling to the point that you almost cringe each time the music has dynamic swings
-the best built preamp i have ever owned and i mean miles and miles ahead. It actually makes ARC preamps look and feel like toys in comparison. 

Pass labs xp30 CONS: (please note that these are based on the comparison i made to the boulder 2010 which is 3 times the price)

- sounds congested at times
- lacks the speed & dynamics of more expensive preamps
- It is not as transparent as the boulder 2010. ( i actually did not hear much of a difference using a cd or streaming tidal through this preamp, but i did notice a difference through the boulder)
- it has great bass, but not as controlled or tight as the boulder

Boulder 2010 cons:
- $$$$$$$
-$$$$$$$$$$$$
- very transparent which means it will put your weak points right in your face
- very but very difficult to find on the used market
- you will find yourself thinking about buying expensive powercords to see how much better it can sound


With all that said, the gap between both preamps is quite obvious through my system. Yesterday i actually had one person tell me that he thinks the boulder 2010 is about 60% of my success here and the xs300s probably the other 40% (he was not counting the speakers) so who knows if this boulder is what is making my alexias sing the way they do now. The only way to find out will be by me buying another preamp at some point and see what the outcome will be. 
For me, i feel that  found the preamp that will continue to go forward with me in this journey and will only be sold if another preamp can come in here and beat it,  but other than that i won't move out of it. It took me 2 years to find it so i won't take that chance. 
What is in my head right now? well, first it is to sell all this stuff i have in my room that i am not using anymore and then begin to look into getting a better streamer to feed a better signal to my esoteric k1. i actually demoed the aurender w20 today and was very impressed. i am also thinking about doing a home demo of the nordost odin 2 speaker cables (i am nuts i know) and potentially their odin 2 powercords. Finally, i want to do isolation devices such as stillpoints or anything like that. 
we shall see...

Fibre Optical streaming is the future. This is not TOSLINK.

https://www.ui.com/unifi-switching/unifi-switch-8-150w/ ($200)

https://www.sonore.us/Signature-Rendu-SE.html (if you are using a DAC with USB).

In the future I think all DACs will have the Fibre Optical input like the Lumin X1 has today.
https://audiophilestyle.com/ca/reviews/lumin-x1-review-r860/

@whitecamaross
i highly recommend the Starsound Technologies Sistrum Apprentice platforms, especially for speakers
http://starsoundtechnologies.com/
Call them and talk to Robert , the owner..... very good guy.
Phone: 330-260-6769

Great initial evaluation on the Alexias @whitecamaross 

I applaud your decision to stay with the Alexia 1's a bit in order to provide a well understood baseline. 👏👏👏
Server / Streamer: Innuos Statement 

DAC: MSB Technology. The higher you go in their line, the better. Pricey though 
Hi WC, not to kick the hornets nest, but having just read a little about your preamp, I was wondering why you chose the 2010 versus the slightly newer 2110?  Not that I know the difference between the two except for the Stereophile review.
The difference between both would ONLY be about 27,000 dollars on top of what I paid for mine :)
I'm not going to spend that extra cash on it. 

WC,
Before you buy another preamp, I suggest loaning back the Merrill Christine preamp which appears to offer similar characteristics as the Boulder.  It is much cheaper than the Boulder, so that would be an interesting shootout.  Either way with Boulder or Christine, plus Pass XS300, you have a good synergy with the clarity of the preamp and the warmth of the Pass.
Ha, I wouldn't dream of it either.  Actually you are the most extravagant audiophile I have had the pleasure of reading the adventures of.  I have to say that just the effort of physically lugging equipment around, unplugging/plugging must be a bit of work.  Thanks for taking it on!
WC

I highly recommend the Isoacoutics Gaia speaker isolators. They come in different models depending upon the speakers weight. The model 1’s are for speakers up to 220 pounds ea. The Titan series are for speakers over that.
They make a dramatic improvement over any other device I have tried. It is not a subtle difference like most of the products out there. The best part is that they’re actually affordable unlike many of their competitors products. $599.00/set of 4.
They are distributed by the same company that handles Focal.
"For me, i feel that  found the preamp that will continue to go forward with me in this journey and will only be sold if another preamp can come in here and beat it,  but other than that i won't move out of it."

Now you're talking!  And do same with Wilson's -- they gotta stay until something clearly beats them.  Only way to keep moving on up, which is what I was suggesting in my first post a couple pages back (I know, hardly novel, but not strictly following has caused regressions from time to time).