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Buckeye Amps: Purifi Mono, 2ch, and 3ch Official Thread
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Got my parts in today for the distortion issue fix. The instructions Buckeye posted earlier were spot on, and everything works as expected. Now, there isn't an audible difference because of how small the issue was (and I don't have gear to put this to the test), so I can't tell exactly what changed other than what's been reported here, but I just wanted to share my experience. Thanks @Buckeye Amps!
OP
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The 1ET7040SA Monoblock v2 is on pre-order sale! Checkout the website for latest prices!
Hapo
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...methinks I am going to change my Buckeye order...
...the Hypex NCx500 has much more power @ 8 and 4 ohm but I am more interested in what happens @ 2ohm...
...I am pretty much confused by most of this, but I understand 40 vs 28 amps...
...the Hypex NCx500 has much more power @ 8 and 4 ohm but I am more interested in what happens @ 2ohm...
...I am pretty much confused by most of this, but I understand 40 vs 28 amps...
As long as you need all that power. Think big woofers hitting loud bass notes in your speakers, assuming they have low impedance too.
Hapo
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...my stack runs @ 2ohms...I don't think it needs a kilowatt, but it is nicer to have more power than we need than not enough to avoid distortion...that is what blows tweeters...
...I did change my Buckeye order from (2X) NCx500 to 1ET4070SA @ the tune of $570 for the change...but now I want to change it again...LoL...
www.audiosciencereview.com
...I did change my Buckeye order from (2X) NCx500 to 1ET4070SA @ the tune of $570 for the change...but now I want to change it again...LoL...
New Purifi amplifiers coming
At the High End I met Purifi, and I was offered a sneak peek of the new 1ET9040BA. Available soon-ish, this amplifier module is a full bridge topology (a first for Bruno Putzeys?) and it has a residual noise of 8uV, so it beats the newest NCorex's. As for power and stability, if I understood...
www.audiosciencereview.com
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ivo.f.doma
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It's a pleasure to do business with you......my stack runs @ 2ohms...I don't think it needs a kilowatt, but it is nicer to have more power than we need than not enough to avoid distortion...that is what blows tweeters...
...I did change my Buckeye order from (2X) NCx500 to 1ET4070SA @ the tune of $570 for the change...but now I want to change it again...LoL...
New Purifi amplifiers coming
At the High End I met Purifi, and I was offered a sneak peek of the new 1ET9040BA. Available soon-ish, this amplifier module is a full bridge topology (a first for Bruno Putzeys?) and it has a residual noise of 8uV, so it beats the newest NCorex's. As for power and stability, if I understood...
@Buckeye Amps What is the rear panel layout for the mono amp chassis? I have 1ET7040SA monos on preorder. I am hoping the mono configuration will have the binding posts and XLR input spaced out so spades are not impeded by the XLR connector below. The 2+ channel Buckeye amps all seem to have the binding posts above the XLR input which I find to be problematic. Any photos of the mono rear panel?
OP
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It is the same layout as the 2/3ch, with Binding Posts above the XLR.
I have not had negative feedback to date of there not being enough room to use spades.
OP
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Our Spring Purifi sale is now live on the website!
Dylan,
How does an amp customer choose between the Purifi or the Hypex NCx500 NCOREx? Will the Buckeye Hypex NCx500 measure at the same exact level as the one built by Rick Sykora reviewed on ASR?
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 local expert, @Rick Sykora. As you see the sample is a "monoblock" configuration (one channel) driven by Hypex SMPS1200 switching power...
www.audiosciencereview.com
OP
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One thing to keep in mind when looking at the NCx review: use the Buffered measurements Amir took (further down the review post).Dylan,
How does an amp customer choose between the Purifi or the Hypex NCx500 NCOREx? Will the Buckeye Hypex NCx500 measure at the same exact level as the one built by Rick Sykora reviewed on ASR?
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 local expert, @Rick Sykora. As you see the sample is a "monoblock" configuration (one channel) driven by Hypex SMPS1200 switching power...
When you compare the NCx with buffer vs. the Purifi the differences in all categories besides power is nearly negligible. So audibly: I would bet 99.9% of the time someone would not be able to hear the difference between the NCx or the Purifi.
So it basically comes down to cost and availability.
...and the personal values choice of whether you absolutely need to have the absolute best of the best (of the best).
IMHO looking at 5W FFT is just different flavours of excellence.
But the THD+N x power curve gives an advantage to the NCx500 in terms of more power available at a slightly higher distortion (still excellent though).
Since both are practically the same price, if I were buying a new amp today, between the two, I would choose the NCx500.
But the THD+N x power curve gives an advantage to the NCx500 in terms of more power available at a slightly higher distortion (still excellent though).
Since both are practically the same price, if I were buying a new amp today, between the two, I would choose the NCx500.
1. Will the Buckeye low gain buffer measure the same as the NCx500 without the 26db Hypex buffer?
2. When you say jumpers can be used to change gain later, does that mean the Buckeye buffer and the Hypex buffer are included and can be simply switched with jumpers? Or does it mean you can jumper the Hypex 26db buffer off or on - but you won't have the Buckeye buffer included in the case? A detailed description of what exactly the jumper does would be nice.
3. Could the OPA1612 OP degrade NCx500 measurements?
4. Will the NCx500 amp make a thumping noise in speakers on power on/off without the Buckeye buffer?
Thank you!
This!
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For most home use cases, amplification is now a solved problem. It can be difficult since there are now two nearly identical solutions to the problem - but it's still a great position to be in!
EDIT: Just looked at @Buckeye Amps ' web site, which I hadn't checked out in a while. $1,025 shipped for a 2-channel Purifi or Hypex NCx amp is just astounding.
- but it's still a great position to be in!EDIT: Just looked at @Buckeye Amps ' web site, which I hadn't checked out in a while. $1,025 shipped for a 2-channel Purifi or Hypex NCx amp is just astounding.
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OP
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If power is the premium in your setup, the NC502 would get the nudge from me. Or have both with the new NCx series
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