The NAD c298 is basicly the same amp but $500.00 more?
Looks like there is a little more to it but I'll let others comment on if the extra engineering and part count is worth it:The NAD c298 is basicly the same amp but $500.00 more?
Nope. NAD use their own home-designed PSU, buffers and inputs board (see above). From few measurements around, we can predict lower SINAD but higher continuous power <1% THD+N.The NAD c298 is basicly the same amp but $500.00 more?
Not quite. I didn't say that Class D "needs" improvements, I said "there's still room for improvements". Understand: for truly SOTA/textbook performance. At these levels, audibility is not in question anyway.Am I correct to say this amp has -85dB THD+N at around 130W at 15kHz compared to 90dB of AHB2 and that is what you are saying why class D needs improvement?
Can you quantify that please?We are talking about technical perfection. And then, this class D is miles behind…
You sound like my history teacher who had never, ever gave a full mark in his life.Not quite. I didn't say that Class D "needs" improvements, I said "there's still room for improvements". Understand: for truly SOTA/textbook performance. At these levels, audibility is not in question anyway.
Have both of them (bigger case as stereo) and the small one in mono configuration.Thanks, @amirm. Excellent price/performance ratio, for sure!
But we unsurprisingly get what is expected performance from a close-to-reference design : 1ET400A + SMPS1200 + transparent buffer board (which is good). Minor differences are due to either production variation or Gain settings. Personally, I would spend a bit more for BoXem Arthur 4215 (for form factor, auto off/on and overall build quality) but none would "sound" any better than the other.
For those who don't know, there's also a cheaper version, with the exact same components in a smaller case:View attachment 194315View attachment 194320
AUDIOPHONICS LPA-S400ET Class D Stereo Amplifier Purifi 2x400W 4 Ohm - Audiophonics
We are proud to offer you the Audiophonics LPA-S400ET, a Class D stereo power amplifier based on two Purifi 1ET400A modules. This ready-built and ready-to-use version is for audiophiles who want to equip themselves with a foolproof amplificationwww.audiophonics.fr
But still, passive loudspeakers with passive crossovers and most driveunit are way, way worse . But the Benchmark is really outstanding if we are looking at technical perfection . But one can argue if anyone can hear the difference between 0.003 % THD + N or 0,1 % THD+N at 20 kHz. I sure cant hear it.You talking about 1kHz SINAD, right. Look at high frequency distortion and Purifi or any class D are still miles behind the best linear amplifiers. Long way to run, still.
Please stop. You ruin countless threads with pointless back and forth arguments which go nowhere.You sound my history teacher who had never, ever gave a full mark in his life.
I've never known any history, philosophy or sociology teacher giving a full mark to anyone, as far as I can recall.You sound my history teacher who had never, ever gave a full mark in his life.
Thanks for your feedback! In fairness, that is more "150€" saved and a lot more compact amp. Strange it get warm, tho. I drove this to very high levels and was surprised how cool it ran (The Apollon Mini being a touch larger, but also not vented at all).Small enclosure can get quite warm, while the big one stays cool.
100 or so eur saving not worth it IMHO.
It has. Three years ago:Does that mean "bypass" (presumably the highest SINAD) has not been measured?
How many times do I have to repeat that I do not argue this? If we stick with audibility, most of the topics here are unimportant. But we are discussing technical limits and approaching to design and realization perfection, to repeat again.But one can argue if anyone can hear the difference between 0.003 % THD + N or 0,1 % THD+N at 20 kHz. I sure cant hear it.
It was a long time ago Nad was both good sounding/measuring and bargains. Now the price is at premium level.Nope. NAD use their own home-designed PSU, buffers and inputs board (see above). From few measurements around, we can predict lower SINAD but higher continuous power <1% THD+N.
Not quite. I didn't say that Class D "needs" improvements, I said "there's still room for improvements". Understand: for truly SOTA/textbook performance. At these levels, audibility is not in question anyway.
Ok I understandHow many times do I have to repeat that I do not argue this? If we stick with audibility, most of the topics here are unimportant. But we are discussing technical limits and approaching to design and realization perfection, to repeat again.
Please stop. You ruin countless threads with pointless back and forth arguments which go nowhere.
So Amir measured SINAD for 2 of the 3 possible gain configurations. Does that mean "bypass" (presumably the highest SINAD) has not been measured?
Makes no sense.Check who manufactures your car’s major parts…
I could easily forget something, but when I estimated price for VTV Eval-1 delivered to France, I got:Hum... are you sure your calculations are correct?!
BTW, VTV build quality is extremely poor when comparing to what you get from @Apollon Audio, @Audiophonics or @boXem | audio... I really see no point to buy overseas when you have great manufacturers nearby .
Thanks for the explanation.They use the same case on other models with more channels. It actually saves them money by standardising on the same case.
A more embarassing question would be: "why do you buy an amplifier if you are short on money"I was very short on money and thought it could be a good option if I get lucky enough to escape customs.
I think 1044 vs 1350 makes a big difference.
I believe that the amps are arranged in a push-pull fashion. IIRC, that presents a more gentle load on the SMPS. It would explain the wiring that you've noted.