Help needed amplifiers for Blade Meta 2

[Purité Audio]

No audible differences that I could detect.
Keith

 

[Thighsofsteel]

Better than Purify?

No.

 

[Geert]

How about Nord Acoustic have they been measured by Amir or other reputable sources?

Nord Three 1ET9040BA MB MKII Mono Block Power Amplifier - Nord Acoustics Ltd

The Nord Three MB is our Flagship Purifi EIGENTAKT 1ET9040BA mono block amplifier. Consisting of amp module, Hypex PSU and our own custom designed input

nordacoustics.co.uk

Or Boxem audio if you're in the EU. One of their amp's has been reviewed by Amir.

 

[sq225917]

The nord, boxem, purifi and benchmark will all be indistinguishable and drive the speakers to the stops. No need for anything more.

 

[goral]

If all those are equivalent "measurement wise" – how do they compare to sth like MC611 or NuVista 800.2 ? Are the latter ones adding "signature sound" that make them different while still measure well?

 

[GavriloD]

Better than Purify?

If you are in US, contact this guy and ask him for advise [email protected]

Purify or Hypex. He also posts on this forum, search that email.

Benchmark is excellent too but way more expensive.

 

[goral]

if i wanted to buy Apollon Audio Premium monoblocks it would cost me the same as buying two NAD M23s and running them in bridge mode.

 

[Sir Sanders Zingmore]

if i wanted to buy Apollon Audio Premium monoblocks it would cost me the same as buying two NAD M23s and running them in bridge mode.

Maybe not a good idea. NAD recommends minimum speaker impedance of 8 ohms in bridge mode.

The blades have “.. effective resistance, or EPDR (footnote 1), lies below 2 ohms between 30Hz and 39Hz and between 813Hz and 881Hz, and below 3 ohms between 3.9kHz and 14kHz. With minimum EPDR values of 1.23 ohms at 34Hz and 1.64 ohms between 813Hz and 881Hz, the Blade Two Meta presents amplifiers with a somewhat demanding load.”

 

[goral]

Maybe not a good idea. NAD recommends minimum speaker impedance of 8 ohms in bridge mode.

The blades have “.. effective resistance, or EPDR (footnote 1), lies below 2 ohms between 30Hz and 39Hz and between 813Hz and 881Hz, and below 3 ohms between 3.9kHz and 14kHz. With minimum EPDR values of 1.23 ohms at 34Hz and 1.64 ohms between 813Hz and 881Hz, the Blade Two Meta presents amplifiers with a somewhat demanding load.”

According to this lab report (https://www.hifinews.com/content/nad-m23-class-d-power-amp-lab-report) they push 420W at 1 Ohm.

Also, the Purifi Eigentakt is supposed to be load-invariant.

 

[Sir Sanders Zingmore]

According to this lab report (https://www.hifinews.com/content/nad-m23-class-d-power-amp-lab-report) they push 420W at 1 Ohm.

Also, the Purifi Eigentakt is supposed to be load-invariant.

The manual says

Low impedance speakers (under 8 ohms) are not recommended when using Bridge Mode as these may cause the amplifier’s thermal cut-out to operate if played at high levels.

It’s not my money so I honestly don’t really care. But if it were, I’d be looking for something else

edit: just saw the price of these. For two of them, you could buy a Sanders Magtech and have stability and more power than you ever need.
If it were my money I’d certainly not be buying the NADs for these speakers.

 

[boXem]

Also, the Purifi Eigentakt is supposed to be load-invariant.

Load invariant means that the frequency response is the same whatever the load - not always the case for class D amps - not that they can push whatever load.
Bridging Purifi 1ET400A or 1ET6525SA based amps is not a good idea with low impedance speakers, better use a 1ET9040BA based amp.

 

[goral]

OK, I didn't know that. I just looked at NAD's manual for bridging.

 

[Multicore]

How about Nord Acoustic have they been measured by Amir or other reputable sources?

Nord Three 1ET9040BA MB MKII Mono Block Power Amplifier - Nord Acoustics Ltd

The Nord Three MB is our Flagship Purifi EIGENTAKT 1ET9040BA mono block amplifier. Consisting of amp module, Hypex PSU and our own custom designed input

nordacoustics.co.uk

Idk who if anyone has published tests for that build. But given the way these things are built I'd gladly trust it on spec.

If you've chosen that module, I would choose a builder based on location. In the USA it would be Buckeye, in the UK Nord, in France etc...

You know what would be real fun for your speakers? 3e Audio A7. That would be a cool antiaudiophile statement. Decorate your home with art, ceramics, rugs, not amps.

 

[goral]

Bridging Purifi 1ET400A or 1ET6525SA based amps is not a good idea with low impedance speakers, better use a 1ET9040BA based amp.

Running two 1ET9040BA amps in bridge mode – given Apollon Audio prices – costs around 6.5k EUR (incl shipping) for me. For 300 EUR more I can get 2nd hand MC452.

 

[GavriloD]

Running two 1ET9040BA amps in bridge mode – given Apollon Audio prices – costs around 6.5k EUR (incl shipping) for me. For 300 EUR more I can get 2nd hand MC452.

boXem - Arthur 5523/E1

1 channel HiFi power amplifier, Purifi second gen. Eigentakt technology. Designed and proudly built in Luxembourg.

boxem-audio.eu

Apollon is needlessly expensive; a pair of BoXem is 3K.

And to be honest, I would much rather take it over MC at the same price, but that's just me.

 

[Kal Rubinson]

Better than Purify?

No. Nor are the Purifi better.

 

[boXem]

Running two 1ET9040BA amps in bridge mode – given Apollon Audio prices – costs around 6.5k EUR (incl shipping) for me. For 300 EUR more I can get 2nd hand MC452.

I don't remember recommending Apollon

 

[Descartes]

No. Nor are the Purifi better.

Do they sound any different? If you believe that amplification has a sound signature?

 

[Descartes]

The manual says

Low impedance speakers (under 8 ohms) are not recommended when using Bridge Mode as these may cause the amplifier’s thermal cut-out to operate if played at high levels.

It’s not my money so I honestly don’t really care. But if it were, I’d be looking for something else

edit: just saw the price of these. For two of them, you could buy a Sanders Magtech and have stability and more power than you ever need.
If it were my money I’d certainly not be buying the NADs for these speakers.

Thank you, I didn’t realize that when bridge in mono they were not able to go down to 2Ohms

 

[Purité Audio]

Do they sound any different? If you believe that amplification has a sound signature?

If they have a signature it is written in invisible ink.
Keith