Buckeye PURIFI 1ET9040BA Amp Review

[Everett T]

I would order mine in the rack mount case, so none of them would bother me.

 

[jpslittleworld]

It's only a relatively recent addition to the test schedule, so there are few amps to compare.

Personally, I've long thought the NCx500 doesn't have any shortcomings in any respect.

I wouldn't think there would be any shortcomings. I was just curious.

I've got two ncx 500 dual mono amps in my house. I love them. I run them at 4 ohm I can't see any reason to upgrade to the purifi.

 

[Billy Budapest]

Can someone explain to me either the colors or blinking pattern of the LED used to signify clipping or fault? Or any other information the LED can convey? Thanks!

 

[Kal Rubinson]

Can someone explain to me either the colors or blinking pattern of the LED used to signify clipping or fault? Or any other information the LED can convey? Thanks!

A single LED indicates On/Active (blue), clipping (orange) or fault (red).

 

[Billy Budapest]

A single LED indicates On/Active (blue), clipping (orange) or fault (red).

Thanks for the info! I couldn’t seem to find that documented anywhere on the internet. No different blinking patterns to indicate the nature of the fault?

 

[Matias]

I was curious on your graph for power output at 40 HZ you didn't have any of the hypex ncx500 amps.

Would you happen to know what the hypex ncx500 mono was doing at 40 HZ power wise into 4 ohm

Not 40 Hz unfortunately, but we have 20 Hz here and it's pretty close (-40 dB = 1%), so 40 Hz must also be around 600 W into 4 ohms.

Hypex NCx500 Class D Amplifier Review

This is a review and detailed measurements of the Hypex NCx500 NCOREx reference design amplifier. It was sent by the company and kindly assembled by our forum expert, @Rick Sykora. As you see the sample is a "monoblock" configuration (one channel) driven by Hypex SMPS1200 switching power...

www.audiosciencereview.com

 

[mdunjic]

Oh it doesn't bother me at all

Me neither ... I bought these monsters and can't be happier

 

[mdunjic]

Incredible, no-compromise amp! Even the higher price doesn’t seem all that excessive.

Thanks @amirm!
PS. did you mean to put 4 Ohm Power vs. distortion (bandwith) graph twice?

I would argue that pair of monster, ultra clean sounding monoblocks, for 2500$ USD, is more than reasonable price

 

[MGJ]

I was curious on your graph for power output at 40 HZ you didn't have any of the hypex ncx500 amps.

Would you happen to know what the hypex ncx500 mono was doing at 40 HZ power wise into 4 ohm

I tested my 2ch NCx500 amp into a 4ohm resistive load at 40hz and got 430w both channels driven. The measurement was taken just before the negative sinewave started to show clipping on the o-scope. If I pushed it further so the positive sinewave also showed clipping, I measured 529w. Both channels measured this way.

 

[Chanur]

What would you suggest as a preamp and DAC that is NOT a Wiim to use with a pair of Buckeye Monoblocks?

 

[Mort]

What would you suggest as a preamp and DAC that is NOT a Wiim to use with a pair of Buckeye Monoblocks?

Minidsp Flex Balanced is my usual.

 

[EdW]

What would you suggest as a preamp and DAC that is NOT a Wiim to use with a pair of Buckeye Monoblocks?

The Buckeye 9040 amps will, likely as not, be paired with top of the range loudspeakers and it makes sense to drive them with a similarly high performance flexible preamp DAC from an established manufacturer. Relatively expensive but very capable are DACs from RME. The top of the range ADI 2/4 pro SE offers PEQ, tone controls, loudness, Sub woofer capability, ADC on analog input which also has an option for digital RIAA equalisation. Also comprehensive headphone outputs.

 

[Kal Rubinson]

The Buckeye 9040 amps will, likely as not, be paired with top of the range loudspeakers........

That is a pity but you are probably right.

 

[DavidEdwinAston]

That is a pity but you are probably right.

How is it a pity?

 

[Kal Rubinson]

How is it a pity?

It is a pity because many of those with "top of the range loudspeakers" will brush it aside because of its low price and not even give it a try.

 

[EdW]

It is a pity because many of those with "top of the range loudspeakers" will brush it aside because of its low price and not even give it a try.

Of course more fool them for not considering the Buckeye 90404 amps. But I like to think that a high percentage of ASR contributors know better

 

[Chanur]

As long as it sounds good I don't have any prejudice against amps.

 

[Will3]

How nice that you're familiar with everybody's needs
I don't know why you keep generalizing about these amps as if they were mainstream mass-market products sold at Amazon or Brandsmart
These are niche products and they are not meant for 98% of the population
Most folks are happy with receivers purchased from Amazon or Best Buy and that's fine
My concern is that the 9040Ba will not be powerful enough to realize the full potential of my speakers
I would like for Purifi to develop a 750 watt (8 Ohms) Eigentakt amp
I have large speakers in a somewhat large room and I would like to light them up on occasion
Sorry if that interferes with your view of the world

At these prices, why not bi-amp sir.

 

[Everett T]

At these prices, why not bi-amp sir.

In general passive bi-amping is worthless to most,, almost as bad as bi-wiring. With passive speakers just get the amp with enough headroom that you need. Now if you're doing an active speaker, that's where you need to divide the power between the drivers.