digitalfrost
Major Contributor
FYI, the kind folks at Purifi contacted me a while back about me testing the unit. As it turns out, I just received email from them that my sample has shipped!
FYI, the kind folks at Purifi contacted me a while back about me testing the unit. As it turns out, I just received email from them that my sample has shipped!
Also noted in the interview, that module needs 9.6Vrms for stated performance, and the measurements/specs aren’t using the optional 5x gain buffer, so unless using the Benchmark DAC 3 (>12Vrms), you likely are gonna need to use the buffer. I wonder how much degradation is causes.It is the next generation of class D modules from Bruno, the designer of nCore, and his partner aka "bromace" Lars, as the interview says.
As for tech specs, their excellent measurements can be seen in the PDF attached. Subjectively it is also said to be an improvement on nCore.
5x gain buffer? How much is the gain for the module without the gain buffer?Also noted in the interview, that module needs 9.6Vrms for stated performance, and the measurements/specs aren’t using the optional 5x gain buffer, so unless using the Benchmark DAC 3 (>12Vrms), you likely are gonna need to use the buffer. I wonder how much degradation is causes.
"According to measurements by PURIFI, the Eigentakt circuit is expected to outperform any audio amplifier known, regardless of technology or class, with THD and IMD quoted as below 0.00017% at all frequencies and power levels"
Let's see the noise component as well...
The Benchmark amp would equal or better that as THD alone (minus N).
Their own specifications page contradicts the hype above:
View attachment 26879
When are they going to stop the BS? On their own plot <0.00017% is between circa 70W and 270W@4ohms . Not 'at all frequencies and power levels'. It's blatantly deceptive hype, yet again. Let's have a 450W@1% joke of a specification to sucker people in. How long can the module do 450W? Oh, wait a minute, it's really only 100W@4ohms rated, so about 50-60W@8ohms, but the distortion isn't guaranteed except in a small range near full power.
Let's put the noise into perspective.
The dynamic range (131dB) they quote is with respect to 450W@1%THD@4ohms and calculates to ~11.8uV. (spec 11.5uV)
The Benchmark AHB-1 Amir measured at (worst case) -112.5dB below 5W@4ohms. That calculates to around 10.6uV, so the Benchmark is also quieter.
God I miss the specifications of old. I miss the honesty, the conservative nature of companies, the humility, and most of all, the lack of crowd-sourced group-think and mindless hype.
Has this interview with Bruno and Lars already been posted?
https://audiophilestyle.com/ca/bits...eaders-qa-with-lars-risbo-bruno-putzeys-r815/
Keith
I bet it will measure well. Whenever I get a GAS attack, I look at this:
http://matrixhifi.com/ENG_contenedor_ppec.htm
It's the so called folding chair test where a Behringer A500 and a consumer DVD player were blind tested against a stack of high end gear. The preference results were not statistically significant. By no means does this mean we should not measure, but we need to look carefully at what works and what doesn't. Toole spent his career doing that.
I think its fabulous
12.8dB5x gain buffer? How much is the gain for the module without the gain buffer?
The Purifi amp arrived and is already on the bench. Review coming soon....
I think its fabulous
Well, that NC400 did superbly so it is not like we have a broken reference.A comparison to an perfect ”correctly” done Hypex nc400 implementation would be really nice. I mean with one SMPS600 per nc400.
Or use the one-channel-only driven measurements for that comparison.
Well, that NC400 did superbly so it is not like we have a broken reference.
Well, that NC400 did superbly so it is not like we have a broken reference.
Yes it is, to me. Because you showed a glimpse of much better performance with only 1 channel driven of that very non-standard nc400-implementation.
I hope you have no kind of agenda here.
I would forget about that test. The explanation is obvious: if you have an element in your audio chain that acts as a big bottleneck, it will logically be very difficult to appreciate differences in the final sound. But it is not the thread.