Buckeye 3 Channel Purifi Amplifier Review (2nd)

[xaxxon]

No amount of advertising can achieve this level of trust in a brand. We'll done Buckeye and thanks again Amir! Very interesting to see the powercube load measurements, although I'm not entirely sure how to read them yet. Consistency is most important I guess?

flat means that it will work consistently into both the speakers you have now as well as speakers you may have in the future.

 

[Rottmannash]

I guess I was supposed to make a no selectable gain amp to appease a complete apples to apples comparison against other offerings.

My bad

What were you thinking?? Why go the extra mile to have an input board built (that many of us requested btw) that decimates the pristine performance of the module?

 

[Rottmannash]

Yeah, the margin has been commented on in other threads. Not precise numbers but mentions that it's quite small. A guy who resells the amps as well as the guy that runs the company have both commented.

And yeah, that's fine to do, obviously. I'm just stating why people may frustrated by it. It's tough to compete with people who are essentially giving away their time - at least compared to traditional hifi design/sales.

That's not saying that it shouldn't be commodity. Just saying that it may be hard for people to adjust.

Why do I doubt Dylan is doing this for free-I assume he's simply not gouging his buyers like many others.

 

[xaxxon]

Why do I doubt Dylan is doing this for free-I assume he's simply not gouging his buyers like many others.

One person's "gouging" is another's "standard margins"

I never said he was doing it "for free"

 

[pseudoid]

3+2 = 5 Source

You really have to go to WolframAlpha for basic 3+2 = 5? Bright.

How does 4+1 and 5+0 work out for you?

 

[Sokel]

The only reason the distortion was discovered was through Amir’s testing, not audibly (i.e. with evidence). So if a claim is made *without evidence*, it should be treated with caution.

As with any distortion more than 80-90db lower than the signal (maybe even less,depends of the signal or the music).

But that's not the point of my post never said anything about audibility and I'm all for evidence as usual.

The point is that even the strangest claim has it's value depending of the experience of the one who claims it.

 

[TNT]

Reactive Load Amplifier Power Testing

OK, more feedback on the reactive load measurements. The scale for the "level" is way to large. I would say that many wouldn't be so happy of giving up half the power in a reactive corner, yet the chosen scale is covering 45 dB. I think that 6 dB (i.e. 6 volts here) would be a proper total scale normally and or worse offender it could be changes with a big "NB"...

As performance is improving generally, test need to be more challenging in order to weed out the king of the crops. Audible or not - this is science - right?

And reactance test for multi-tone... that would be really interesting to see...

I would welcome a "state of the nation" article from you about the measurement resolution and a general discussion on the way forward for the measurement suite. And again, in the name of science, not so much what can be heard but rather a discussion of how measurement could be improved to really secure that a perfect DUT can be separated from the less good ones - now that "everything" is starting to measure "fantastic" (with todays standard...)

You need to progress or relevance will deter...

//

 

[Koeitje]

More channel, more noise/distortion. Is it right?
Previously the 8-channel from the same brand got SINAD 90dB.

Or, less signal because more channel?

Different modules in the 8 channel. More channels don't mean more distortion if you are using separate modules for every one or two channels. What you are confused about might be how certain DAC chips can handle multiple channels but you can combine them to create one channel with higher performance.

 

[pma]

OK, more feedback on the reactive load measurements.

I am afraid that the impact of reactive load is generally not well understood. Their impact is to peak power dissipation of output transistors, their safe operating area. Not that much on distortion, and paradoxically, at much reduced distortion you get high peak power stress. Let's open a new thread for this. Some thumbnails attached. Peak power is high at the area where impedance magnitude seems to be high enough. EPDR and phase are telling the story. EPDR plot should be a part of every speaker impedance measurement, as it defines amplifier stress.

 

[theREALdotnet]

Oops, sorry. Just saw @AdamG247 ’s admonition.

 

[GWolfman]

Phew!!! That to me is a bang for the buck amp if i’ve seen one.

Bang for the buck eye, right?!

 

[Rottmannash]

One person's "gouging" is another's "standard margins"

I never said he was doing it "for free"

"It's tough to compete with people who are essentially giving away their time"

 

[Buckeye Amps]

FWIW: My prices do include labor but at a level I would assume is well below what comparable companies in the industry might charge (i.e. those where the owners are also doing their own labor work).

From Day 1 I have thoroughly enjoyed putting these amps together, much like how I used to assemble models as a hobby for fun. I boot up a new series/show/movie and just work. So I have never found the need to apply a large premium to my time.

If you enjoy what you do, it isn't work in the traditional sense.

 

[Rottmannash]

FWIW: My prices do include labor but at a level I would assume is well below what comparable companies in the industry might charge (i.e. those where the owners are also doing their own labor work).

From Day 1 I have thoroughly enjoyed putting these amps together, much like how I used to assemble models as a hobby for fun. I boot up a new series/show/movie and just work. So I have never found the need to apply a large premium to my time.

If you enjoy what you do, it isn't work in the traditional sense.

And we thank you for it!

 

[goryu]

State of the art performance + rock bottom prices = market dominance.

Amazing that there are still people out there willing to pay 4-5-10 x the price of these amps for amps with less performance. Then again, there will always be those who value form over substance.

 

[Mr. Widget]

FWIW: My prices do include labor but at a level I would assume is well below what comparable companies in the industry might charge (i.e. those where the owners are also doing their own labor work).

From Day 1 I have thoroughly enjoyed putting these amps together, much like how I used to assemble models as a hobby for fun. I boot up a new series/show/movie and just work. So I have never found the need to apply a large premium to my time.

If you enjoy what you do, it isn't work in the traditional sense.

I better order mine before the spell wears off.

 

[Rottmannash]

I better order mine before the spell wears off.

The spell has actually strengthened over time as the 3 channel Purifi is now several hundred dollars less than when I pre-ordered one.

 

[Kachda]

The point is that even the strangest claim has it's value depending of the experience of the one who claims it.

As long as the claim is backed up by evidence. Otherwise we are back to power cables making a difference bullshit

 

[xaxxon]

"It's tough to compete with people who are essentially giving away their time"

Key word is "essentially"

 

[xaxxon]

FWIW: My prices do include labor but at a level I would assume is well below what comparable companies in the industry might charge (i.e. those where the owners are also doing their own labor work).

From Day 1 I have thoroughly enjoyed putting these amps together, much like how I used to assemble models as a hobby for fun. I boot up a new series/show/movie and just work. So I have never found the need to apply a large premium to my time.

If you enjoy what you do, it isn't work in the traditional sense.

and I super appreciate what you do. In the other comments I was simply trying to help people understand why it may frustrate other people who want to run it more like a traditional audio business.