AGD Duet Monoblocks

@hilde45 

I think change is coming and the days of $8k Class D amps may be numbered.

I haven't seen that happen. Usually the newcomers jack up their prices to match the industry.

@campoly 

My experience with the Fosi amps has certainly made me rethink where and how my money might be best spent, at least regarding amplifiers. 

I would not put them in audiophile class. The power is over-rated and it struggles above 5kHz; at 4ohm it loses over 0.5dB and at 8ohm is gains over 1db. If that's what you like, then it's a good deal and you can easily afford the next product update.

@bartsw, If “audiophile class” = expensive, then sure, it certainly doesn’t belong.

“it struggles above 5kHz“, I’m not sure what this means but I didn’t hear them struggling to do anything. My ribbons still sounded amazing.

“at 4ohm it loses over 0.5dB and at 8ohm is gains over 1db”. Are you saying it does this in the treble region or overall? Either way, I couldn’t perceive any gain or loss of db in any region of the spectrum. Perhaps some measurement device could.

As far as what I like, I like my amps to be clean and quiet and unobtrusive. I want my amps to drive my speakers to my preferred level without compression and distortion and just allow the speakers to do their thing.

All I’m saying is, the Fosi’s weren’t a disaster nor a disappointment even though I’m happy to have my PS Audio amps back. I’m not pushing Fosi and after actually spending some time with them, I’m certainly not going to discourage anyone from trying them for themselves.

I have the same Linn Selekt( with organic and utopic ps).

i use Burson Audio Timekeeper GT4 Monoblocks. They work for me with my Totem Tribe Towers, which i will upgrade to the Totem Tribe Thunderbirds.

You might consider either of the Burson Audio Timekeeper Voyager Monoblocks or the LAiV Harmony GaNM Monoblocks.

Here is a review you may be interested in.

https://youtu.be/OuiOIalpQqo?si=TILrbg2gYkJsZl6U

Cheers and good luck

Yes great explanation  from agd.i wish more manufactures would comment on thier development.  As a surgeon i had to have the same policy as i don't know what the other doctor did i was not there but this is how I was trained to do  it and would explain the procedure. More than one way to do things .thanks

I have the Fosi monos with the Upgrade OP-amps, tuned to my liking. I would say that they sound very good. if I did not have my Pass or My Benchmark AHB2, I would settle with this Fosi. it drives my B&W 707 beautifully. no doubt about it. however, for the sake of discussion, it cannot come close to my primary amps. I guess speaker synergy is what's needed for this to sing and some of the posters above got it. I tried it all my speakers (Falcon Gold badge, ATC SCM, Klipsch, and Maggie's) the Fosi drove them well BUT cannot bring to you the realism of what the Pass or the Benchmarks can do. This I experienced it myself. So, if the Fosi sound great on your speakers, well that is all you'll ever need.