Then there were 2

@decooney  I haven't received them yet but the owner currently has KT150's in them. I am getting full complement of KT88 and KT150s. for them. It will be a little while but as soon as I get them I will post my impressions for sure. Thanks

@jimbones I am purchasing the V4’s. I am optimistic that they will give me the sound I am after. I didn’t want the CJ sound but I didn’t want the new school tube sound that is almost SS sounding. I think the QS will fall in the middle.Thanks for the heads up!!

Hey Jim,
Nice! Are the V4s the older KT88 or newer KT150 version? Either would be nice. Curious to hear more about your impressions when you get the amps settled in. While stock form is nice, experimentation with different input/driver tubes and caps can move the sound in different directions too, if desired. Please report back as you listen to them and learn more.

Not to hijack, but the AudioMirror SETs with upgrades are also a very nice alternative. 

Just wanted to chime in here having owned the
ST-100 long enough to know it pretty well. I disagree with reviews stating this amp sounds more like solid state than tubes. Yes it’s very quiet and has low noise floor but sonics wise it’s still a tube amp. The Rogue has great mids. Highs are sweet. Bass is deep and not bloated but may not have the ultimate control. It is not the last word in transparency, speed and dynamics (I made a move to ST-100 from Pass Labs X250.5). 
One feature on the ST-100 that I like a lot is the ability to switch between the Ultralinear and Triode modes that gives you around 60w/ch in Triode instead of 100w/ch in Ultralinear. I prefer Triode as it results in bigger soundstage and even sweeter sound. 
I’ve also owned several ARC preamps and lately tried two Rogue preamps (RP-1 and RP-5) that I have sold. I’ve not owned but have heard various ARC amps over the years for an extended enough period of time and in systems I’m familiar with to tell you that ARC is superior and the difference will not be marginal. ARC is ARC and Rogue is Rogue.
I’m not familiar with Quicksilver but if it were me and cost not a consideration the ARC without a doubt would be my first choice. 

@ jimbones
Good move! The Quicksilver is very flexible. You can use many different tube types if you want to change the flavor of the sound. I have the smaller QS Silver Seventy. I prefer using KT88 type tubes. I have never tried the KT 150 so I can’t give you an opinion on them. Have fun!!

@yogiboy  I am purchasing the V4's. I am optimistic that they will give me the sound I am after. I didn't want the CJ sound but I didn't want the new school tube sound that is almost SS sounding. I think the QS will fall in the middle.Thanks for the heads up!!

Quicksilver will have new 100W (KT150) /80W (KT88) monoblocks available from November, I was told.

On it

Here ya go!
https://www.audioasylumtrader.com/ca/listing/Amplifier-Tube/Quicksilver/V4-Mono-Blocks/218564

@jimbones 

thanks for responding.  appreciate it.  if you get a chance you should check out the other 'Jim bones' work.  he is an amazing photographer.  you might enjoy it.

sailboat

arc uses printed circuit boards

it is neither a positive nor a negative

+1

arc uses printed circuit boards

it is neither a positive nor a negative

@tomic601 I agree. I have been told the KT150's make a big difference. I'll be patient I have a number of choices that I have whittled down to QS and ARC. I would only buy the Rouge if I can demo it.

i think point 2 point vs. a PCB is the absolute last thing to worry about…..

ARC is point to point vs Rogue circuit board?

Huh? That's news- I've never heard of a hand-wired ARC product. All that I've ever seen have employed circuit boards.

The VT80SE seems similar to the Ref75se so I would expect that to be a good alternative 

I have the REF 75SE, formerly had the REF 150 nonSE and Classic 120s.  This is the best amp I have had including several solid state before getting into ARC.  My only Rogue experience was the Ares Magnum phonostage.  I was very disappointed in comparison to ARC's phono stages and that would make me expect ARCs amps to better theirs as well.  My speakers are the Wilson Audio Sophia and it drives them very well.  Outside of a poor speaker match I cannot imagine you being disappointed in the 75SE.  Good luck!

 I am totally in the ARC groove...have seven of their pieces. It's a long strange journey but (not for nothing as they say) I have had my mid-range amp used to power a mastering system playback and it stood up remarkable well against custom Levinson amps.  That's my take on it.
Regards,
barts

@hshifi You had already suggested the Rogue preamp, I purposely decided on the RP7 as it lets me tailor the sound a bit via tube rolling.
I dislike Class D, never heard one I liked. I don't want SS as I already have one I am keeping (for the time being) This is purely a tube play.

Hello,
I was wondering if the Rogue DragoN would work. It’s 300 watts. You will still have the RP7 to produce that awesome sound you like. Also, you might want to try the RP9. It is on another level compared to the RP7. Add the DragoN to that and your done. I am not sure if you are near the Chicagoland area but this dealer is close to me. https://holmaudio.com/This store lets you demo in your home. 

@mijostyn will it really make that much of a difference going from parallel 4 ohm to series 16 ohm? What would expect the difference to be when listening?

@mijostyn I have GR Research Subs: 4 12 inch servo controlled woofers

ARC is point to point vs Rogue circuit board?  I could be wrong but I have owned a Cronus Magnum II and a VT-60.  Sure miss the VT-60 but the Cronus not so much.

@sailboat, no I am not. I got the nick name Bones from a lot of physical injuries doing advanced skiing, downhill ,mountain biking and playing ice hockey goaltender for over 50 years. I like to think of myself as Humpty Dumpty Lol

@ jimbones: interesting audiogon user handle name.  I know there is more than one person named Jim Bones out there in the world..... but by any remote chance are you  'Jim Bones' the large format nature & wilderness photographer?  

probably not.. but had to ask.  That would be way cool.

sailboat

@ghdprentice , I hate it when that happens.

Wire the woofers in series, adjust the crossover and get the ARC. Next think about subwoofers. You can make them yourself for smart money.

@richopp who said i have Maggies? I do not consider ARC settling (other than power output.)

ARC

Why settle if you don't have to?

Hope you are auditioning Magnepan speakers IN YOUR ROOM before you make a final speaker decision with your ARC amp and, hopefully, matching ARC pre-amp.

Prepare to be amazed!

Cheers!

ARC.

In addition to what everyone else has said, they’re service is great.

All the best.

JD

I've had ARC pre & power amps for years and have found them to be reliable and very musical.  I've also not experienced any service issues with them.  The Ref 75 is a fine piece of kit, but I'd look at going up a step to the Ref 80s.  There is a used one for sale here on Audiogon.  The audiobias is nice and the look is a bit more modern.  

The ARC is the real thing the ROGUE is a toy I'm afraid. What about CARY?

Audio Research in my opinion is unquestionable the superior choice. Incredible sound, build quality over decades. Exceptional valuable over time. Also, I had recommended Rogue to a friend a long tine ago, the amp blew up during the warranty period and the owner would not repair it. I will never get over the humiliation of that recommendation.

QuickSilver V4’s over the ARC, I have first hand experience with both brands and value QS is a no brainer but also a very good sound and super reliable.  My GS150 was short lived and quality with the new ARC is questionable along with customer service.  I have friends that are dealers for both and QS is their pick to own.

Ref 75 SE over QS 120mono over the Rogue 
I started with Rogue  when I upgraded it was between Ref75 and Aesthetix Atlas went with Aesthetix 

Enjoy the Music 
Tom

@jimbones Well then its 8 ohms, but the efficiency in all cases remains the same. I think you're better off with the dual woofers, because you have more surface area for making bass and less excursion. Putting them in series works great for tubes.

@atmasphere good point, will do. Or maybe just make it a 8 inch 2 way 8 ohm speaker.

There are 2 woofer in each cabinet. The woofers themselves are 90db. but with 2 in parallel it is higher but I dont have exact measurements of efficiency. speakers are 4 ohm.

@jimbones Tube amps do not double power as impedance is cut in half. That is why efficiency is a more useful spec than sensitivity when tube amps are involved. In this case, while sensitivity does increase, the efficiency remains the same. Since the total wattage of most any tube amp is lower into 4 ohms, I think you will find that you simply need more power.

I would also consider putting the woofers in series rather than parallel. They will act the same in the enclosure although you'll have to change your crossover a bit. But a tube amp will thank you as it will make more power, have wider bandwidth (particularly in the bass) and make less distortion.

this is wierd my post did not "post"
lets try this again: Input Impedance
ARC 300K balancedRogue 200K (not specified)QS 100K single ended
ARC should be fine

a pair of mono 120 sold in 56 minutes the other day once posted on Audiogon. It was posted at 9:52pm and I got home at 10:50 and it was sold.

@yogiboy Are you sure the M120 is not available? Did Mike tell you that? http://quicksilveraudio.com/products/mono-120/

90 days ago he was backordered with a backlog of customers. Not sure now, someone would need to ask him again for an update. I’ve had five different people unsolicited reach out asking me if I’d consider selling mine. Demand seems to be greater than supply at this time. They are worth the wait if you can.

@gakerty thank you for that reminder. I will check the specs on each amp.

@atmasphere i estimate the efficiency at 90db-92db. There are 2 woofer in each cabinet. The woofers themselves are 90db. but with 2 in parallel it is higher but I dont have exact measurements of efficiency. speakers are 4 ohm.

@yogiboy yep spoke to mike, he has a new model called KT mono but he cant deliver due to parts shortages. V4 also toast.

my own 2 way speakers two MW16P and TW29R Satori drivers.

Is that between 2 cabinets or just in 1?

Do you have any idea of the efficiency and impedance of the speakers?
In a room that size 100-130 watts will work if the speakers are 92dB although you'll be able to run the amps out of gas if you really push it. If the speakers are 4 Ohms you might need more power.

Go with the ARC, better sounding, higher resale value, etc.  The Rogue is for value consumers, the ARC is for music lovers.

One thing to note if using the RP7 as a pre, (from Stereophile's measurements):

" As a result of the increased output impedance at low frequencies, the RP-7's response drastically rolled off below 400Hz into 600 ohms, reaching –3dB at 200Hz (fig.1, cyan and magenta traces). The RP-7 should not be used with power amplifiers having an input impedance much below 30k ohms. Into 100k ohms, however, the RP-7 offers a flat, wide-bandwidth response with an upper –3dB frequency of 170kHz"

Keep in mind the input impedence of the power amp you will be using with it.  I have an RP7 and a Stereo100 and the match is lovely, as it should be with the same brand.

rogue might be quite good but for my dollar i would go arc if the cost is not a deterrent

Are you sure the M120 is not available? Did Mike tell you that?
http://quicksilveraudio.com/products/mono-120/

@craig I own an RP7 so I know how accessible Mark and Nick are. Very good company to deal with. I find their stuff a little to much like solid state, i am getting used to it. I did demo the QS and a VTL in my system and it was very good.

@elliot I am using my own 2 way speakers two MW16P and TW29R Satori drivers. Room is 14x22x7