• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are daily reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Various Hypex NCx500 amp builds

MikeO

Member
Forum Donor
Joined
Jan 16, 2023
Messages
5
Likes
13
I will order a pair of Hypex NCx500 monoblocks to listen to in my system. It seems many companies today are using Hypex designs, so why not give it a listen?

There are many "online companies” that sell these NCx500 monoblocks as a basic design or with optional/upgradable OP Amps or binding posts. A quick Google search will bring up at least five companies from the USA or Europe (the NCore available at Deer Creek Audio, Nord One NCX500MB, VTV Amplifier, Buckeye Amps, Apollon Audio).

It’s difficult to tell if these are garage operations or something more advanced, but the quality of the website does factor in a warm, fuzzy feeling or not...

Deer Creek Audio NCore shows a (what I assume is a factory) implementation when compared among the other ones. They don’t seem to sell with other “build options” like optional OP Amps.

The Nord One has their new buffer board with the inputs soldered right on it among a few other possible improvements. How it will measure and sound compared to the build at Deer Creek is yet to be determined.

So, has anyone here given these a listen with a particular build? Thoughts?




Same insides as above but with a thicker case (as confirmed by Apollon):


I'll compare them to my Theta Enterprise monoblocks. I like the sound of the Thetas even though they may not measure as nicely and their design is much older.
 
Last edited:

Martin S.

New Member
Joined
May 31, 2023
Messages
3
Likes
0
I have been reading lots and lots about Class D and I finalished a listeneing session with amongst others:
-Primare integrated Multi Channel amp: SPA 25 based on Hypex UcD250LP
-Primare power amp A35.2

Both with DIrac disabled, 2 channel stereo only in a pre seriously configured listening room.

I was super impressed with sound of both also in comparison with Arcam AVR 20 which is a ClassA/B integrated amp.

There are some threats of both primare machines already in this Forum.

Pls share your expieriences with all Class D equipment you get the opportunity listening to!!
 
Last edited:

boXem

Major Contributor
Audio Company
Joined
Jun 19, 2019
Messages
2,005
Likes
4,779
Location
Europe
Unless they significantly fucked up, all of these amps should sound exactly the same. If you want one, look for features, looks and budget.
When I see the lack of care for thermal design that a lot of them exhibit, I am not sure that all of these amps will last the same.
 

voodooless

Master Contributor
Forum Donor
Joined
Jun 16, 2020
Messages
9,988
Likes
17,282
Location
Netherlands
When I see the lack of care for thermal design that a lot of them exhibit, I am not sure that all of these amps will last the same.
Good point! That wasn't the question though ;)
 

boXem

Major Contributor
Audio Company
Joined
Jun 19, 2019
Messages
2,005
Likes
4,779
Location
Europe
Good point! That wasn't the question though ;)
Indeed, but in my ideal world I wish that people would ask themselves questions like "Will the electronics be properly cooled in a pizza oven?" instead of asking for listening impressions. Just me dreaming awake :facepalm:
 

wizardofoz

Member
Joined
Feb 16, 2019
Messages
39
Likes
33
Location
Singapore
I have an Apollon 8350 which has 4 x NC502MP modules and these have additional Heatsinks attached to each amp plate, but the cooling options in the case vents are a little bit limited so have installed some slow running fans to keep things in check.
IMG_7112.jpeg
 

restorer-john

Grand Contributor
Joined
Mar 1, 2018
Messages
12,431
Likes
37,746
Location
Gold Coast, Queensland, Australia
I have an Apollon 8350 which has 4 x NC502MP modules and these have additional Heatsinks attached to each amp plate, but the cooling options in the case vents are a little bit limited so have installed some slow running fans to keep things in check.View attachment 315295

With the Hypex stuff, it's spot temperatures that are too high for long term reliability.

You need a lot of forced air cooling to bring the output filter inductors down to reasonable temperatures, along with the two SMPS transformers (main and aux) which pretty much always sit above 75 to 85 degrees C when just idling (no signal). The output filters run hot all the time. Thing is, they are also passively heating the adjacent components to those temperatures too.

I've got a Nord One on my bench that has cooked itself and the idle temperatures are in my opinion, too high for no forced air cooling, especially in Australia.

The output stages barely contribute any heat, until the amplifiers are really being driven hard.
 

NoMoFoNo

Active Member
Joined
Mar 1, 2020
Messages
261
Likes
317
Has there been an issue with unusual failure rates with Hypex modules? I've seen the threads here about Topping PA5 amps but am unaware of widespread complaints about Hypex (or Purifi) stuff.
 
Top Bottom