Class D amplifier with TPA 3250 board

Hey, if it sounds loud to me I ain't bothered! 

Speaker specs are intentionally confusing anyways. The OGY are so easy to drive because they're just 4" paper drivers with a 1/4 transmission line inside a 30x30x15 cm box. 

@kokakolia in my experience, and in my system, and to my ears, those little class T / D amps -when they are well built- can be far better sounding than any mass-market class AB solid state amps, like entry level Japanese. Then when you go higher in prices the scales revert but let me tell you, you can still be very surprised: I have a friend who bought some massive vintage French speakers (AudioReference 126DC, 97dB) and he first tried to use them with his big Musical Fidelity M6i, and the results were extremely "meh". Then I came to his place with a tiny Nuforce Icon amp, and the speakers came alive. The sound was more fresh, more vivid, more detailed. There is a certain quality that somehow brings you closer to the music (specially with TA2024 and TA2020 chips)

I’ll be curious to read what you think of it.

@rolox So I came back from an 8h train ride and finally had a chance to try the Sure amplifier. I hooked it up to the Node in a jiffy and listened to a bunch of tracks with Deezer/BluOS (subwoofer still in box). Yo be fair, I was in a cranky mood and I was also in the mood for finding flaws. 

First impressions: ??? I was impressed at first then I ended on a meh.

So there is a noise floor but you have to stand like 30cm from the drivers to hear it. So it gets a pass. 

I can't figure the volume knob, it spins freely over 360° and doesn't seem to go very loud. But volume is sufficient for my appartment use. I'll just play music moderately loud. Fine. 

Bass just doesn't slap like on the tube amplifier. It's kinda there but not really, like the orange flavor in Fanta. 

Midrange and Treble are remarkably clear. And that's a bit terrifying in a good way. I heard stuff on the Sure that I didn't hear on the tube amplifier. 

Buuuut I have to get used to the Sure's kind of dry presentation. It's CLEAR, almost to a fault. But you just don't feel much of the instrument decay/reverberation in the recording. Fleet Foxes Sunblind sounded like (really good) elevator music, because the Sure lacked some punch. 

I think I can get used to the Sure, and then the tube amplifier will sound woolly in comparison. I'm hoping the subwoofer will help. I could use more bass. Maybe the dinky power supply I ordered really doesn't help. It's 3A 12V 36W "laptop brick". 

I'm probably the only idiot pairing a set of $2k speakers with a 40€ amp. And the results are just fine. 

I'm not really sure what is trying to be accomplished here.  I can comment that I have built no less than a dozen class d amps from modules.  TA2024, TA2020, TA2022, Tk2050 TAS5613, TAS5630, TDA7498, TPA3255, IRS2092, a couple different Sure/Wondom tri path boards..... yada yada.  The Tri paths, when critical parts were switched out and a solid power supply was put under them, they all sounded at least decent.  A couple ended up very good. As far at the argument that an amp was tested and it was 10 percent distortion??? Take a world class Class A amplifier and drive it hard enough, it will produce high distortions too.  The question is "Can some of these little Class D amps sound good?"  You bet... Beware, some of the Class D amps that I built were not good.  The TPA3255 That I mentioned earlier turned out quite good. as did a Wondom 400 what per channel board, sorry, I don't remember the chipset on that board... it was called 400 watts per channel, when I was finished, it spec'd out at around 60 watts to 8 and 120 to 4, but either way, ended up being a nice sounding little amp.  I am only saying that when used with the right speakers a few of these little amps can perform admirably, no, not quite world class, but very satisfying, good performing amplifiers