Class D Amp Journey

Lets hear your history with the black sheep :wink: of the amp world, here is mine;

My journey so far with Class D
I lost my job in 2019 and sold everything I had which was basically tube stuff Rogue, Audio Research, Modwright, started hearing about really good amps for low money, her is my history:

2009 Virtue Audio small integrated that used a Tripath chip amp later added a tube input buffer, very sweet sounding amp
2010 Audiocircle had a thread about a company out of CA ClassDaudio that hired handicapped people that built class d amp boards for kits, so I built a dual mono amp sounded great for the cost of less than 1K
2015 D Sonic M3-800 mono amps based on Pascal boards I found them a little bright and not involving
2016 Acoustic Imagery Atsah 500 mono amps with Ncore 500 boards very nice sound
2016 Nord One Up mono amps with Ncore 500 boards also heard they had custom input boards that you could change out the op-amps and customize the sound how you like it
2020 Traded Nords on the PS Audio M1200’s another nice upgrade everything is just better with tube inputs, very satisfied


First class D amp I ever heard I bought for my car stereo. Had of have been in the early 90s. Worst sounding thing I ever heard. It was out of the car and replaced in a couple weeks. Then, years later, I was auditioning my Magnepans and the dealer was using a Peachtree amp. I couldn’t get over how small it was. He said it was class D. It still wasn’t my cup of tea but way better than anything else I’d heard. When the M700s came out I was so intrigued. After all, I could audition them for 30 days. I heard them in my system and there was no going back. These were keepers. Then, PSA had to go an put out the M1200s. Again, I was intrigued. Now I own a pair. Class D is not the thing to be feared that it once was.

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Other than my subwoofer’s amp, I had no experience with Class D at all until getting my M700s. For the record, they replaced an Emotiva BasX A-300 (1 year), which replaced a B&K ST-140 (33 years), which replaced a GAS Son of Ampzilla (8 years).

My three REL Acoustics subwoofers have Class D amplifiers. That was the limit of my “experience” with such, until I recently purchased a pair of AGD Productions, “The Audion” mono. amplifiers to try for 15 days.

I am four days in and I am enjoying them so far. Very clean and effortless but more listening time is required for me to form a solid opinion.


My first class D was my Sprout100 which is in my den as my second system. With covid keeping me working from home, it gets A LOT of use. I am always startled by the subtle nuances and imaging this little guy puts out. For now, I would not give up A or A/B in my main system, but class D seems a very good option indeed.

Classe CA-D200
PS Audio M-700’s
PS Audio M-1200’s

First was an NAD 7050 network amplifier. Nearly 10 years ago? Ahdunno. Still use it in my workshop.

Got a Sprout100 at the end of 2018 as my foray into better audio equipment, but it didn’t really do it for me, so I sold that.

I got a Rogue Audio Sphinx V3 powering my Magnepans in my downstairs dungeon system, and it sounds great.

But because I’m crazy and I can’t leave well enough alone, I found a pair of Bel Canto M500 Ref monos to try with the Maggies and those arrive Friday.

According to the FedEx tracking, my home lobotomy kit should arrive the same day.

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