Review and Measurements of Purifi 1ET400A Amplifier

[Julf]

Do we really need that silver stuff?

No. Of course not.

 

[maty]

Inferior? Why?

https://www.stereophile.com/content/bel-canto-eone-ref600m-power-amplifier-measurements

 

[maty]

https://www.audiosciencereview.com/...-and-measurements-of-nord-one-nc500-amp.7704/

NC500 with Hypex Buffer Evaluation board

Bel Canto e.One Ref600M

 

[Audiocrusader]

Maty what was the input buffer type used in the Nord one review? Looks to me like the Hypex IC opamp based OEM evaluation board:

https://www.hypex.nl/product/nc500-oem-converter/51

Thanks for keeping things accurate.

 

[maty]

Is that Hypex only manufactured one, the evaluation. Since then Nord has not improved much (very bad implementation).

 

[Audiocrusader]

Is that Hypex only manufactured one, the evaluation. Since then Nord has not improved much (very bad implementation).

Was there another review with measurements of his amp with custom discrete buffer?

 

[boggit10]

Yep with Hypex buffer, I was inferring our REV D buffer using Polystyrene capacitors, metal film resistors and discrete Voltage regulators and Op amps.
We sell very few Hypex buffered amps, but is an entry point into NC500 and allows a quick DIY upgrade at a latter date. As you know the Hypex buffer board was intended as an evaluation tool for manufactures only.

 

[maty]

Nope.

Ideally, with different buffers but well implemented by Apollon or Rouge Audio. And atm.

 

[Audiocrusader]

Nope.

Ideally, with different buffers but well implemented by Apollon or Rouge Audio.

There was reviews with measurements of those amps somewhere?

 

[maty]

Not.

 

[Audiocrusader]

Not.

So how do you know which amp is better implemented?

 

[maty]

Hypex NC500: atm (jalejos) buffer v2 and v3 with different op-amp.

https://www.audiosciencereview.com/...burson-sparkos-sonic994-1612.3305/post-157712

Correct wiring, no wires above the transformer, distances between modules, especially to the SMPS coil... heat dissipation.

 

[carlob]

Yep with Hypex buffer, I was inferring our REV D buffer using Polystyrene capacitors, metal film resistors and discrete Voltage regulators and Op amps.
We sell very few Hypex buffered amps, but is an entry point into NC500 and allows a quick DIY upgrade at a latter date. As you know the Hypex buffer board was intended as an evaluation tool for manufactures only.

Is the Purifi 1ET400A amp still for sale? Can't find it anymore

 

[Matias]

Quoting my buddy Mike from Mivera audio

@BreakingBad by the way it is not cool to quote Mike, from his private forum, without his consent.

 

[Matias]

Is the Purifi 1ET400A amp still for sale? Can't find it anymore

https://www.nordacoustics.co.uk/purifi1et400aamplifiers

https://www.apollonaudio.com/purifi-1et400a-apollon-audio-monoblock/

 

[carlob]

https://www.nordacoustics.co.uk/purifi1et400aamplifiers

https://www.apollonaudio.com/purifi-1et400a-apollon-audio-monoblock/

Thanks, I don't know why but yesterday was browsing the Nord website and couldn't find it. I'll check also the Apollon one but the real decision I have to make is if it's worth spending a bit more to get the Benchmark AHB2

 

[Matias]

Thanks, I don't know why but yesterday was browsing the Nord website and couldn't find it. I'll check also the Apollon one but the real decision I have to make is if it's worth spending a bit more to get the Benchmark AHB2

If I were you I would try the Purifi first, and if not happy, then sell it (should be easy) and then get the AHB2. There is a price difference...

 

[March Audio]

Nord's implementation is Bad! Quoting my buddy Mike from Mivera audio :

I can't believe he's using cheap Chinese unshielded what appears to be 18-20g AC mains wire. But that's not the worst part. He's running the hot (brown wire) not only through 10-15x the amount of cable as the neutral, also through a very high loss, low current capable push button switch on the front panel. Those tiny low current contact in that switch are not designed for this kind of current. Then you can see that cheap IDE ribbon cable that was designed for old school hard drives, CD drives and floppy drives carries the super noisy aux power from the Hypex supply to his buffer board. The Sparko opamps (which were the worst sounding 990/2520 format discrete opamps I ever tested) are installed in his buffer.
And the Sparko regulators share the duty of powering them and the modulator board that is sticking up on the side of the Purifi module. On the Puribuffers that board gets its own dedicated dual supply. Same with my gain stage. Speaker wire looks like Neotech copper which is good. But nowhere in the league of the OCC silver. And at 10x less cost it should be expected. Speaker binding posts are Chinese brass, with tin ringlets tightened on with brass nuts.
But guess what, not a single person besides me would ever notice any of those things. And the worst part is the Purifi modules themselves, are going to be judged based on implementations like this or worse.

Unfortunately by quoting Mike your credibility has been destroyed. Not bad for your first post.

 

[goryu]

Unfortunately by quoting Mike your credibility has been destroyed. Not bad for your first post.

As has been mentioned, the business model for Minerva is just plain dumb. Frankly, with all the constant controversy this Mike character seems to generate, I am surprised Bruno has anything to do with him.

 

[Thomas savage]

Unfortunately by quoting Mike your credibility has been destroyed. Not bad for your first post.

Ha ha , classic Mike .