Get 2 x newer even better Hypex NCx500 mono amps, use them in mono chassis with big linear supplies (like I did but using the older swapable NC500 modules), I use them with no buffer input just straight analog balance in from a high output source MSB discrete dac with balanced out and digital domain volume control= magic!! Just short of full up for really really loud with quite recorded discs into my 91db speakers. No preamps or buffers in the way.
Cheers George
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The Purifi amps have a buffer just like the Hypex amps. 13dB is the gain when bypassing the buffer, about the same as the Hypex amps if you bypass their buffer. With the buffer, you get around 26dB or so with both Purifi and Hypex.
Again, so what? The final result is what matters and these Peachtree amps even with their "one less stage" have inferior performance in comparison with the Purifi, Hypex and Orchard. Less is not more in this case- less is just less.
That's the perfect gain. Wasted gain is an enemy; a nice decision in my book. Input impedance is lowish, but not a problem for modern sources.
If you need full power/more gain, add a pre-amp stage... (which is included in all commercial class D digital amps).
One has to wonder why Peachtree bothered to incur the likely additional expense of the newer GaN tech, if it really didnt result in a better amplifier? So they could spin yarn harder in the marketing?
Perhaps their "final result" is to sell more amplifier units and if running GaN up the flagpole achieves that - doesnt matter if it's actually inferior; they end up shipping more units to consumers than the other three combined. Because they understand their market and know how to get a opened wallet response from the customers in that market.
I agree but my dac is 2V rmsd output and to make 400w you would need 56V rmsd from 2V thats approx 28x amplification or more than 20dB. Of course you'll never need the 400W at home but then why get a 400W amp to get 10-15W out of it? Do these amp use lots of feedback? I couldnt find the number in the datasheet
I think the reason could also be to accommodate people with efficient speakers, who want to try Class D amplifiers.
13dB gain might be just perfect in similar to your situations, and avoid pre-amp... just use the streamer app volume.
It is always better to have a 13dB option, and then maybe use an external gain stage powered by a really low-noise nice liner power supply.... There's another degree of flexibility... to experiment and try different things, which I think is cool.
These amplifiers use multiple feedback, local, global... it varies from amp to amp.
13dB gain might be just perfect in similar to your situations, and avoid pre-amp... just use the streamer app volume.
It is always better to have a 13dB option, and then maybe use an external gain stage powered by a really low-noise nice liner power supply.... There's another degree of flexibility... to experiment and try different things, which I think is cool.
These amplifiers use multiple feedback, local, global... it varies from amp to amp.
I would be curious to see where the sawtooth generation is in, say, an UcD topology.
Page 4...."When the reference waveform is not a triangle or sawtooth, the modulation becomes nonlinear" ...
http://amorgignitamorem.nl/Audio/HD702/UcD/ucd_aes.pdf
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http://amorgignitamorem.nl/Audio/HD702/UcD/ucd_aes.pdf
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No just newer than the almost the same NC500, just a bit more grunt into 2ohms. The NCx500, also dosen't have a buffer stage just like the NC500 and they are pin for pin exchangeable. But to purchase them you need to be in the trade and join up an account with Hypex for purchasing them.
I think the Niai has a built in buffer that can't be bypassed and is also not as powerfull as either the NCx500 or the NC500, it's meant for the DIY enthusiasts for anyone to purchase.
Cheers George
NCx500
| Power (2Ω): | 700W |
|---|---|
| Power (4Ω): | 700W |
| Power (8Ω): | 400W |
NC500
| Power (2Ω): | 550W |
|---|---|
| Power (4Ω): | 700W |
| Power (8Ω): | 400W |
Nilai
| Power (2Ω): | 500W |
|---|---|
| Power (4Ω): | 525W |
| Power (8Ω): | 260W |
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The Peachtree has factors more distortion with less stages than the Purifi, Hypex and Orchard. So tell me again, how is less more?
What is the driving force behind any commercial business? Profit, of course. GaN is the flavor of the day so why not make a bunch of marketing claims that most will not bother to fact check and ride that snake oil greased copy as long as possible? Audio is full of irrational, poorly educated customers who are always looking for something "better" and in the basest expression of capitalism, there are always plenty of vendors more than happy to fleece these lemmings of their money.
Well, there's two kinds; the "tidy" profit enjoyed by privately owned companies and that other kind which must feed 1000s of hollow fangs all sucking the blood. It's this second kind that has no issue with resorting to all kinds of "mischief" in order to give each of those fangs the impression of a - not even steady - a continuously increasing flow. It's even codified into law, as an obligation.
It's really surprising to see some really, really big place go private; Dell comes to mind. It's like they cant take it any more. So it behooves one to look into the reason for a firms existence, at the current time their product is presented for sale. Is it to actually make Audio better, as perhaps Purifi is doing? Or do they only want to give the impression of doing that, while it's more like some quite orthogonal interest that's the real driving force behind their products.
It's so much work just to live a life and not get bitten. I understand the fatigue behind who'd want to do all that; I just want to listen to some good sounding music. My amplifiers are all either used, vintage or from a privately held company. Somehow, it just worked out that way.
I find about 90% of the audio sales pitches and many of the "products" themselves online are full of bs. And reading a variety of audio boards, there are just as many people who literally "buy into" the hype and bs. I guess as with politicians, we get what we deserve. Perhaps this is one driving force behind DIY audio- one gets tired of all the charlatans. It is refreshing to see companies like Hypex and Purifi come along every now and then that actually are honest and knowledgeable.
Sorry yes the NCx500 has a buffer that can be bypassed which I would do as I have ample source output, and have proved in A/B's that the best buffer is no buffer if possible, it's just an extra stage that's not needed.
As I said the more distortion your on about is so minimal not even a bat could hear it, and yes less is more if not needed, 3 x extra stages or global feedback.
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