Class D amplifier with TPA 3250 board

@kokakolia  okay, I'm curious (although I'm wary of the "barely any difference" affirmations) it's probably a neat little amp, I wonder if the TA2024 is an original tripath or a brand new Chinese copy (as long as it works it doesn't really matter)

Looks like it's mainly surface mount components inside (?) so tweaking might be difficult (maybe not needed), and the RCA and speaker connectors seem very cheap / small, but that's ok.

I believe you will be pleasantly surprised, give it a couple days of break in before judging its sound quality, and don't forget it's just barely 8watts / channel before distortion starts to raise (but 8 watts can be surprisingly loud).

Let us know how it sounds!

My OGY speakers are very efficient at 91db SPL. I only need a few watts. The manufacturer rates the OGY at 15W 8ohm max. If I get 4W out of the amp it should be enough to annoy the neighbors. 

My #1 priority is noise floor, since my speakers are quite sensitive. But even my Yamaha RN402 had a small tiny noise floor which was only noticeable when you stood very closely to the tweeter. So I'm not very fussy I suppose. My tube amplifier was just that bad. 

My other big concern is that people seem too kind with these chip amplifiers online. The rock bottom price plays a huge part in that. I say this because there's no shortage of branded A/B amplifiers on the used market between 80€ and 400€. If this T amplifier can't compete with 150€  used Yamaha A/B amplifier then it's not worth my time. 

So I'm crossing my fingers. I'll keep you updated on Sunday. 

I have built several Class D amplifiers.  I used a TPA3255 by 3e audio.  I switched out a few key caps on the board. I used a 12 amp switching supply and added 120,000 mfd for the supply.  I engaged the PFFB circuit which makes the frequency response stable at all impedance loads, I wired it for balanced operation.  

It was very good.  I had several amps selling on marketplace and sold a few. That amp was snatched up first.  

@kokakolia

Sure, but if you have a subwoofer already it might compensate right?

If you drive the sub from the preamp, yes.

My OGY speakers are very efficient at 91db SPL.

That's not high efficiency! That's a moderate efficiency; you enter high efficiency territory when the speaker is about 97dB or higher.

If you are listening nearfield I can understand using such low power. In a typical American room you'd want about 50-60 Watts to make a speaker of that efficiency play properly.

The only conversion from AC to DC I can think of for the amp (to which you referred above) would be creating a DC power supply for the filaments of the tubes in the amp. FWIW this is sending up a bit of a warning flag for me. We use AC filaments in almost all of our amps and they are plenty quiet enough to use on horn speakers. In addition, if you are getting a hum from the filaments of the tubes, the hum would be 50Hz and not 100Hz (because its induced at the line frequency)!

So while I am keeping all this in abeyance, I must admit to having lost some faith in your 'artisan'. Of course this is all hearsay...

@atmasphere 50W is a lot! My terrible tube amp doesn’t even go to 20W and I have the volume set to minimum.

My room is about 24m^2, maybe less. My speakers are rated at 15W max. I am also listening from a distance of 1~3m.

Yeah the artisan sucks. Tell me something new. I’m gonna be using my Sure amplifier for the time being (when it arrives home). You know the cheap T amp.

At this point my expectations have been lowered so far down that any amplifier which doesn’t exhibit a loud noise floor will sound like angels singing from the sky.