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Reasons to go with Purifi 9040s over Nilai

restorer-john said:
If you are mounting the amplifier/s thermally coupled to an aluminium plate with finned vertical heatsinks to the outside/ambient air on the rear of the speaker/s you may be able to operate them somewhat reliably. The power supplies would also need effective coupling to such a heatsink and the outside/ambient air.

Placing any heat producing components in a sealed box is not sensible.
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Unfortunately this is the only option I have.
Looking at the different vendors, it seems to me that the Nord specifically the SE case is an efficient chassis for heat dissipation. It has thick, machined aluminum walls with fins and could do the job if paired with an efficient module.
 
blackiridium said:
So heat in a completely enclosed cabinets won’t be an issue with these versions?
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There is no airflow/air exchange (whether passive or active) into/out of the cabinet?

Even with a Purifi that idles cooler than the Hypex NC252MP, putting it in an enclosed cabinet with no air exchange or airflow would not be the best idea.
 
Buckeye Amps said:
There is no airflow/air exchange (whether passive or active) into/out of the cabinet?

Even with a Purifi that idles cooler than the Hypex NC252MP, putting it in an enclosed cabinet with no air exchange or airflow would not be the best idea.
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No airflow. The amps will need to go inside a media console that have doors in front.
I guess I could always open the doors when listening to music and/or using it as a HT system
 
blackiridium said:
Thanks. I understand the Nilai has even better thermal characteristics from the ncx500 model? The question then is whether to go with the Nilai or the Purifi 9040s
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Forget about the thermal. Won’t be a problem at all. You will not run your amp at full power as well. Either of them will sound about the same, if not exactly the same.
 
terryforsythe said:
That has not been my experience. I have heard tube amps with pathetic bass response and too much harmonic distortion for my taste.

That being said, once you get into good solid state amps, they do start to sound the same, i.e., transparent.
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Yes, there can be some load dependency with class D still but the amps discussed here don't have that.

And about the thermals, I have NC400s that are passively cooled in the standard DIY cases from Hypex. The case just gets lukewarm at best.
 
Koeitje said:
Yes, there can be some load dependency with class D still but the amps discussed here don't have that.

And about the thermals, I have NC400s that are passively cooled in the standard DIY cases from Hypex. The case just gets lukewarm at best.
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I think it depends.
The time they got out the very first usual power hungry suspects rushed for them,mainly about the promise of power with low price.

So ATC,Magnepan and Martin Logan.
The first two made the amp run as if it was in idle,just warm.
The last ones could get the monos to go boiling hot.

So it depends.
 
Sokel said:
I think it depends.
The time they got out the very first usual power hungry suspects rushed for them,mainly about the promise of power with low price.

So ATC,Magnepan and Martin Logan.
The first two made the amp run as if it was in idle,just warm.
The last ones could get the monos to go boiling hot.

So it depends.
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OP is going to use them with SCM20's. Not going to be an issue at all.
 
Reviving this thread as I've changed my speaker selection to KEF R6s. They have nominal 4ohms with 3.2ohm minimal and 88db sensitivity. Does this change the recommendations that people have given me?
 
Either one will work perfectly fine and are excellent choices, IMHO. The Purifi 1ET9040B will provide a bit more power than the Nilai. The 1ET9040B can also deliver higher current than the Nilai to loads below 4 Ω. For the KEF R6 Meta, its impedance drops below 4 Ω from ~100 - 270 Hz.

1et9040b.png



Nilai.png



index.php
 
The Purifi 1ET9040B does have better technical performance over the Nilai.
 
The Purifi is technically better. I have not listened to the new Purifi or the NCx500 Hypex. The ATC SCM20?? are what I would call very transparent with low distortion if they are the A model..I think those are the ones I'm familiar with.

I use a Nilai DIY Stereo with my Polk R700's but I tried it with my KEF R3 Meta's for a couple weeks as well. It seemed like a fine match. I thought the KEF R6 was a center channel? Using 2 for stereo?

I understand that we should hear no difference between amps if all things considered are pretty equal but I'd pick a Nilai over any past Hypex or Purifi...though I can't speak for the newer monster power units.

I wouldn't stick a Stereo Nilai in an enclosed area to idle though. I had mine
 
In a semi enclosed area..open in front & back with a few inches open on top. Running it at high volumes is no issues. Letting it sit for multiple hours on idle and it heats up. I let it sit over night idling & when I cranked it up in the morning it popped a fuse. Go monoblock and stick it behind the speaker. Shorter speaker wires that route anyway. Good luck.
Any of these Hypex or Purifi amps will get the job done & then some.
 
blackiridium said:
So the Purifi 9040 would be a better choice?
Click to expand...

The Purifi 2-channel 1ET6525SA would be my pick for your particular needs. It offers plenty of power and offers the coolest running and most energy efficient option available. It won't over heat and you will be totally happy. The Hypex designs need more cooling than you can provide in a close cabinet.

Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!
www.buckeyeamp.com www.buckeyeamp.com
 
amper42 said:
The Purifi 2-channel 1ET6525SA would be my pick for your particular needs. It offers plenty of power and offers the coolest running and most energy efficient option available. It won't over heat and you will be totally happy. The Hypex designs need more cooling than you can provide in a close cabinet.

Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!
www.buckeyeamp.com www.buckeyeamp.com
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Yeah, I’m eagerly waiting for these to come out
 
I have the Hypex Nilai Stereo. It has air holes in the top cover. I placed it in an audio cabinet in a space that is 22.5" W x 22.75" D x 5.38" H. When listening at moderate levels the front door to the cabinet usually is closed. When I play it fairly loud I usually open the cabinet door. In both cases, the amp gets a little warm, but not hot to the touch.
 
terryforsythe said:
The 1ET9040BA looks like a clean unit. The gain is pretty low, though: 14.4 dB according to the data sheet. Some of the older Purify amps, and the Nilai, have multiple gain settings. I do not see that in the 1ET9040BA Data Sheet.
Click to expand...
Most manufacturers offer either adjustable gain settings or their buffer boards have gain built in.
 
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