Hypex NCx500 Class D Amplifier Review

[ivo.f.doma]

We have made measurements (26.8 dB gain) using our test setup which only has 107 dB dynamic range of THD + N measurement capability. This is what we measured (SINAD 107 dB) and only represents the test equipment THD + N as the NCx500s are better. In listening, these amplifiers are as quiet as a dark night in deep space with intense layering, dimension and power. Please PM me if you would like me to send you the plots. I don't want to publish the plots as some may not understand test equipment limitations. This is a pure Hypex build with the Hypex on board buffer amplifiers and SMPS1200A700 power supply.

That looks like an overall better amp than the Purifi!

 

[Hapo]

...is this something available to the general public....???...

 

[delta76]

...is this something available to the general public....???...

this is supposed to be used by manufacturers, i.e. OEM
if you want to build it yourself, their is Nilai500 DIY module with comparable performance, but aims to DYI market

 

[Vacceo]

We have made measurements (26.8 dB gain) using our test setup which only has 107 dB dynamic range of THD + N measurement capability. This is what we measured (SINAD 107 dB) and only represents the test equipment THD + N as the NCx500s are better. In listening, these amplifiers are as quiet as a dark night in deep space with intense layering, dimension and power. Please PM me if you would like me to send you the plots. I don't want to publish the plots as some may not understand test equipment limitations. This is a pure Hypex build with the Hypex on board buffer amplifiers and SMPS1200A700 power supply.

I understand Amir standard of 115 db as a way to get a 100% guaranteed clean, non audible transparent signal. However, I personally consider that anything beyond 100 db gets you that too on a more practical level. Honestly, that result is "beyond CD quality" clean. At 26.8 db gain and with the wattage that these modules output, that is absolutely satisfactory in my book.

On the other hand, the efficiency of these amps is also close to max thermodynamic capacity.

 

[withoutsuit]

If you would have to buy an amplifier the next weeks - would you choose Purifi oder NCx500? I´ve an eye on the Apollon Purifi Mini, but it´s expensive - for less money, I could choose an NCx500 from NORD oder Buckeye.

 

[delta76]

If you would have to buy an amplifier the next weeks - would you choose Purifi oder NCx500? I´ve an eye on the Apollon Purifi Mini, but it´s expensive - for less money, I could choose an NCx500 from NORD oder Buckeye.

Yes.
Comparable results (or Purifi slightly better). it has been around long enough to have any issues ironed out.
but you can't go wrong with either.

 

[Buckeye Amps]

If you would have to buy an amplifier the next weeks - would you choose Purifi oder NCx500? I´ve an eye on the Apollon Purifi Mini, but it´s expensive - for less money, I could choose an NCx500 from NORD oder Buckeye.

In real world listening, the NCx and Purifi are virtually identical. If you can wait, you can save some money and go with NCx builds as they are about to hit market.
If needing amplification now, grab the Purifi and don't worry about second guessing or fear of missing out

 

[Matias]

If you would have to buy an amplifier the next weeks - would you choose Purifi oder NCx500? I´ve an eye on the Apollon Purifi Mini, but it´s expensive - for less money, I could choose an NCx500 from NORD oder Buckeye.

Nord has several options here.

NORD ONE HYPEX NCx500 Archives - Nord Acoustics Ltd

nordacoustics.co.uk

Edit: and now Buckeye too, things are moving fast.

Multichannel Hypex NCORE and Purifi Amplifier Products — Buckeye Amps - Hypex NCORE and Purifi 1ET400A

A wide selection of multichannel Class D amplifiers built around Hypex NCORE and Purifi Eigentakt modules. Hand built with free shipping!

www.buckeyeamp.com

 

[Hapo]

...I want to buy one of these amps...will they sell out before the first one is delivered...???...

...the Buckeye amp is available with either/or the Hypex or their custom 3 level buffer for the same price...(?!?)...

...is there an advantage either way...???...what would Amir do...?!?...(LoL)

 

[withoutsuit]

Please note that you need to enter your shipping address and postal code, so that the website can calculate the shipping costs. We ship worldwide.

Do you plan to make a sale of the purifi based amplifiers, as NCx500 becomes more and more available (and seems to be cheaper)?

 

[Buckeye Amps]

 

[withoutsuit]

My Interpretation is "Disagreement" In Fact, my observation was, that Ncx 500 is cheaper than purifi modules. The offers of Nord and Buckeye suggests that.

 

[chingaling]

We have made measurements (26.8 dB gain) using our test setup which only has 107 dB dynamic range of THD + N measurement capability. This is what we measured (SINAD 107 dB) and only represents the test equipment THD + N as the NCx500s are better. In listening, these amplifiers are as quiet as a dark night in deep space with intense layering, dimension and power. Please PM me if you would like me to send you the plots. I don't want to publish the plots as some may not understand test equipment limitations. This is a pure Hypex build with the Hypex on board buffer amplifiers and SMPS1200A700 power supply.

What pre amp were you using when you gave it a demo. I purchased a SHD from you a few years back. I was wondering how this would pair with it.

 

[chingaling]

These new class D’s put down some crazy numbers @deercreekaudio

 

[Hapo]

...I don't like how they run @ 2 ohms...is that related to current capacity...???...

 

[JSmith]

@ 2 ohms

Actually, it looks like these may have been mislabelled (@amirm), as peak power is higher than max power;

Is that what you mean?


JSmith

 

[57gold]

Read somewhere, perhaps here, that Purifi was introducing a high current version of the 1ET7040SA, maybe a module that is bridgeable? Was I reading this or dreaming it? Thanks.

 

[Hapo]

...is that that amp on the Buckeye site for preorder...???...40 amps current capacity...???...

....is that the high current model or is there one with even more...???...

...I just changed my Buckeye order from the NCx500 amp over to a Purifi 1ET7040SA amplifier behind the way it ramps up to 1kw @2 ohms...

...I figger that has to have something to do with 40 amps vs 28 amps despite the disparity in power numbers @ 8 ohms...

...there is quite a disparity in price as well but I am running a 2 ohm load, eh...

Buckeye Amps: Purifi Mono, 2ch, and 3ch Official Thread

Purifi 1ET400A specs: - 450w @ 2ohm - 425w @ 4ohm - 225w @ 8ohm Purifi 1ET7040SA specs: - 950w @ 2ohm* - 500w @ 4ohm* - 250w @ 8ohm* *Full power output now achieved with new SMPS* Custom Input Buffer Board w/: - Neutrik XLR connectors - OPA1612 Input Stage - TI TPS7A49/30 Voltage Regulators -...

www.audiosciencereview.com

 

[57gold]

Read it here:

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

 

[Hapo]

...now I want to change my order again...