I recently heard the Julian Lage trio at the Berklee Performance Center from a 5th row center section aisle seat. A Class D 8 boxes per side "Phased array" above me...sounded great. I did a show with his trio a couple of years ago using a Class A/B system...he sounded great there also. I’ve heard recordings of his trio through my Class A single ended 12WPC tube amp, and clearly, small wattage little hand wired tube amps are the future, and the past...or something. Tonight I’ll be at the last show of a John Scofield stand at "Scullers" (off the Mass pike), they use what I assume are Class D phased array speakers, and he’s promoting his new thing, "66." Feel free to say hello, assuming you can get through my bodyguards.
The Future of Audio Amplification
I have recently paired an Audio Research DS225 Class D amplifier with an Audio Research tube preamplifier (SP8 mkii). I cannot believe how wonderful and lifelike my music sounds. The DS225 replaced an Audio Research SD135 Class AB amplifier. Perhaps the SD135 is just not as good as some of the better quality amps that are out there, but it got me thinking that amazingly wonderful sonance can be achieved with a tubed pre and Class D amp. I have a hunch that as more people experience this combination, it will likely catch on and become the future path of many, if not most audiophile systems. It is interesting that Audio Research has been at the forefront of this development.
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Great topic BTW! Amp technology HAS come a log way in recent years and continues to evolve and getting the right amp for ones needs and speakers is one of the most critical decisions to be made towards the goal of getting the best sound possible at a particular price point. Class D is a game changer for sure! |
Good quality Class D is the practical ticket these days (efficient and sound great done well) if your speakers require lots of power and current to do their best and you care about higher SPLS. The only equivalent alternative is a more traditional giant, bulky, expensive power-sucking monster amp of yore which are becoming increasingly hard to find and afford because frankly hardly anyone wants to have to deal with all that. The other popular and unique use case for Class D is you just want something very inexpensive and small that represents a very practical and good value. That can be had for <$100 and matched to the right also inexpensive but good quality small speakers can get you a significant portion of the way there for practically nothing on the high end audiophile scale of things. That is very bad news unfortunately for high end audio! Perhaps one reason for some of the derision heaved towards Class D in some cases. If your speakers have limited bass extension, or are just an easy load to drive, and perhaps are somewhat more efficient, or you just do not listen at higher SPLs, then any good quality more modest power amp design might do. |
Only dipped my toe in class D but the next revision in my main system will likely include some higher end class d as a trial. My daughters system is powered by a little old NAD D3020 mk2 and it drives the Epos bookshelves to window rattling volumes with no detrimental musical artifacts that I can detect. I replaced the two huge HT amps a couple of years ago with one tiny Nuforce 8 channel power amp that absolutely blew the other power amps out of the water in every aspect and that honestly surprised me. Now I see empty space on my ht rack and have no desire to fill it with anything! |
I’ve heard a number of Class D offerings. I just bought the TAD Evolution Stereo Amp and matching Preamp/DAC. Also have the E-1 speakers. I can tell you that this Class D amp is not playing second fiddle. With the same speakers I’ve heard Audio Research, Pass Labs, Luxman, Burmester, and maybe another I’m forgetting. The TAD Evo M2500 was as good as or better than all mentioned with the exception of the Burmester 909 MKII, but that amp is $80k. Class D has come a long way and it will only get better. As mentioned by others, Rowland and Merrill are two other makers of high end Class D amps. @guidocorona Haven’t seen Guido in here yet, but he knows a good bit about Class D and has significant experience with it. Maybe he’ll stop by here and provide some insight. |
kosst_amojan Almost nothing I said is up for debate ...Sorry, but no one here is immune from having his remarks subject to debate. You enjoy no special privilege here. Those are technical facts that have nothing to do with listening.This is a hobbyist audiophile forum, so it is all about listening. |
might be time to listen...again.... that is part of the fun after all, otherwise we would all just be on discogs...talking about music.... I bet the hard core organ crowd hates the synthesizer dudes...also, sausage and Filet be da&&ed ! atually Kost, I love them both ! as for music....dropping the digital needle on Pacific Gas and Electric - Are You Ready |
kosst_amojan Listening preferences are in the ear of the beholder. If class d doesn't float your boat,that's fine with me. Enjoy the journey... |
There are "top end" amps in A, AB and D, have been for quite a while. Not sure I understand why that would make anyone unhappy. I think it's pretty cool, both from a vintage point of view and newer designs. Agreed. I think a large part of this is aesthetic and manliness. Imagine in 10,000 years, if man still exists, that audio technology reduces the top end audio and multi channel systems to the size of a book. Would we still be desperate to own the latest? E |
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kosst_amojan said..."What does anything I said have to do with what I’ve ’heard’ ?" Well...Everything!!!!! How can you comment on a technology that you have not even ’heard’ in a well set up high end system? I suggest that when you get the time...go give a listen to what your preconceived notion about a class d amp can not possibly be. Please let us know when you have ’heard’ for yourself. |
My currently owned..and loved..Merrill Audio Veritas monoblocks [class D] have thoroughly spanked both my previously owned Edge NL 10 and Music Reference RM 9 MKII tube amp. And I mean... s-p-a-n-k-e-d !!! I plan on a future upgrade to Merrill's new Element 114 monos as soon as they become available... Merrill's new proprietary design using the gallium nitride transistors as a launch point will lay to rest the silly notion of class d amps being inferior to any other design...can't wait. |
kosst, why do you get so emotional when someone disagrees with your position? You’re obviously a knowledgable guy and such abrupt bursts of emotions mixed with anger shadows the technical inputs. These A vs. D amp discussions never end well, just like passive vs. active preamps, cables, fuses, etc. Its best to read technical journals and articles from unbiased reputable sources. |
kosst_amojan1,814 posts12-02-2018 11:56pm"anybody"? What must they be thinking over at Jeff Rowland Design Group. My $1300 switching amplifier mono-block kits mounted on some rock maple easily replaced a few highly regarded linear solid state amplifiers. The last one at almost seven times the price. My studio monitor system is not about listening to music its about hearing what I've recorded. By comparison the linear amps were slightly colored and would sound congested the more they were pushed despite their higher power ratings. The switchers are plate glass transparent and provide a welcome forward presentation that clearly conveys microphone positioning in the small highly treated studio. Absolutly superior. Its been well over a decade since a linear amp powered any of my subwoofers. Even my little Acoustic Image Focus 2R Bass amplifier is a three pound switcher that gets my Upshot speaker, amp, and Fiddle out the door hand held in one trip. Class D is not out to replace anything its about the right tool for the job. A third choice. Jeez. |
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Did a MGA Tunable Room in Chicago and powering my Rev60 speakers was a tiny Class D amp. Tons of dynamics and extension on both ends. There are pictures of the setup on TuneLand, lots of fun. this is probably the truth I would agree "In the years to come they will get better, cheaper, and lighter. It will come to a point where only a fool or someone nostalgic will buy a heavy power sucking class A amp." Michael Green |
Until recently, I've been a long time stick in the mud stalwart for class A, AB, tube or solid state guy, but recently, due to some downsizing and restructuring of my listening space, I decided to take the plunge and try PS Audio's Stellar Gain Cell DAC preamp and M700 monoblocks, connected by balanced cables. After a solid week of "break in" around 200 hours (which I am skeptical about), even at the lowest volume as recommended by the folks at the company, I can say that they are as smooth, sweet, musical, warm and deep sounding as any amp I've owned and listened extensively to previously, and, perhaps even a bit more dynamic, especially at low <70 dB SPL volumes. Other amps I've also owned and enjoyed including Manley Stingray, Snapper, and NEO 250 monoblocks, Krell 400cx and intergrateds, CJ tube and solid state integrateds, Musical Fidelity, Bryston 7BST monoblocks, Bryston 4BST stereo amp, Parasound stereo amps (200 WPC and 75 WPC) and two different NAD integrateds. I conclude that Class D, when done well at the input and output stages (in this case augmenting ICEPower modules with their proprietary Gain Cell mosfet input stage) can rival any other class of amplification. And they run totally cool, use very little wall juice (leave em on all the time!) and have micro and macro dynamics, even at low volume that reveals the source material better than any I've experienced previously. I know that's saying alot, but I have decided to keep them. Call me converted. |
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Amplifiers are going class D. That's just a fact. I've owned 3 and none have impressed me until the Lyngdorf 2170 and impress me it does. Better than any separates or tube equipment I have owned. Nothing class D sounding about it. Smooth as silk with great dynamics when called for. In the years to come they will get better, cheaper, and lighter. It will come to a point where only a fool or someone nostalgic will buy a heavy power sucking class A amp. IMO of course. |
I have heard both the ARC monoblock 450 wpc and stereo class D amps (225 wpc )with a REF5 , source was TT , Ayre CD player, AQ cables and Vandersteen 7 at HiFi buys ( at that time 2013 Audio Alternative) other amps auditioned that day over a 9 hour period: Aesthetix Atlas - Stereo Ayre MXR ARC Ref150 ARC HD220 while the ARC class D amps finished last ( I ended up buying an Ayre VXR, they put up a good account of themselves. Not the last word in refinement, smoothness, etc....they are relatively inexpensive and don’t require a long term care contract with a chiropractor i suspect ARC and others will keep pushing the quality and refinement for obvious reasons.....as they should...just as the best more traditional circuit designers will also keep pushing, as they should..... |
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I heard Linear Tube Audio preamp + Bel Canto Ref 600 recently, and together they sounded very good. True audiophilia, on the other hand, involves a certain measure of necessary sufferint. Class A without a/c in the summer; needed to hire moving people every time you rearrange your listening room, etc. |
People dissing Class D should really mention what Class D amps they have heard in what kind of setup and what they are comparing to. Blanket statements have no value. BTW each of my Class D amps ($75, $2000, $6000 retail) sound very different much like one might find with 3 different amps of any type especially in diverse price categories so beware making blanket statements based on limited exposure and personal biases even perhaps. |
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There's no stopping the Audiophile. I say Audiophile as opposed to HEA Audiophile. The audiophile mainstream is no longer associated with high price and heavy and is only going to increase in this direction, there's no turning back. I for one am thrilled, and say "about time". Well actually said "about time" in 1997 but if you talked like this back then it was too prophetic even though the insiders knew the change would have to come. Michael Green |
I have 3 Class D amps in the house now that retail for $6000, $2000 and $75. Guess what? Even $75 buys a very good sounding Class D amp these days easily as good or better than other older SS amps costing several times that 40 years ago. I use an ARC tube pre-amp with the $6000 amps and yes very nice! I will probably dump tubes altogether again though someday as I continue to downsize and discover viable alternatives. |
