Apollon Audio Class-D Amp Build Quality

[pos]

@Apollon Audio, what will be the gain of the nc2k amp?

 

[Apollon Audio]

@Apollon Audio, what will be the gain of the nc2k amp?

The gain in our PNC2K is 34dB by default and PNC1200 is 28dB by default. We can also make the gain custom if desired.

All PNC series amplifiers have 100 kΩ input impedance.

 

[Apollon Audio]

Here are some additional pictures.

 

[pos]

The gain in our PNC2K is 34dB by default (...) We can also make the gain custom if desired

How low can it be set to? How many dBu can the input buffer handle without clipping?

 

[NielsMayer]

I was talking about this one. The zoomed in picture is not the same unit. My major complaint would be taken care of by moving the XLR inputs to the right of their respective outputs. Nobody looks behind the amp anyways so the external grouping is unimportant.

"I zoomed in our NC800SL stereo unit"

View attachment 27142

 

[pos]

How low can it be set to? How many dBu can the input buffer handle without clipping?

to put things in perspective:
gain of the bare nc2k module (buffer-less) is 20dB/x10, implying a 23.2dBu/11.3Vrms sensitivity for a 8 ohms load (and a bit less at 4 ohms).
A 34dB/x50 gain (ie 14dB gain in the buffer) implies a 9.2dBu/2.3Vrms sensitivty @ 8ohms.

So to rephrase my question: can the buffer be made unity gain, and can it in that case handle 23dBu without any sign of clipping/distortion?
If not, what is the lowest possible/sensible gain setting?

 

[Apollon Audio]

I was talking about this one. The zoomed in picture is not the same unit. My major complaint would be taken care of by moving the XLR inputs to the right of their respective outputs. Nobody looks behind the amp anyways so the external grouping is unimportant.

This unit also has the additional pin from the XLR Neutrik connector soldered to the pin1. It is hard to see on this photo, because it is covered with insulation.

 

[Apollon Audio]

also regarding above chassis, although you can basically multiply the size of all those holes in the bottom by 4-10 x, and then use that to determine the wavelengths of the frequencies they will allow to pass through nearly unhindred. Certainly not an issue for the fundamental modulation frequenciy but not necessarily the harmonics. What does the FCC say about these units?

What does an FCC-compliant chassis using an NC-XXX module look like??

Actually the baseplate is not on the bottom of the amplifier. There is an additional 4mm Aluminium cover underneath the baseplate.

 

[Apollon Audio]

to put things in perspective:
gain of the bare nc2k module (buffer-less) is 20dB/x10, implying a 23.2dBu/11.3Vrms sensitivity for a 8 ohms load (and a bit less at 4 ohms).
A 34dB/x50 gain (ie 14dB gain in the buffer) implies a 9.2dBu/2.3Vrms sensitivty @ 8ohms.

So to rephrase my question: can the buffer be made unity gain, and can it in that case handle 23dBu without any sign of clipping/distortion?
If not, what is the lowest possible/sensible gain setting?

The lowest we went with the NC2K module was 28dB so 8dB gain in the buffer. We have to test lower gain settings. I will get back to you with the answer if unity gain is possible.

 

[Matias]

@Apollon Audio any chance of sending an NC800SL PRO and/or an PNC1200 for @amirm to review?

 

[maty]

@Matias

Tarragona (Spain) is closer! Amirm can take charge of the objective measurements using tones and other noises and I of the subjective ones with really well recorded music with high/very high DR!

But better than not, I will not have to reject the decision made last week to keep my second audio system as it is.

"Father, if you are willing, take this cup away from me; still, not my will but yours be done." Luke 22:42

 

[maty]

If by chance it sounded worse than mine (why not?), it will be a compromise. If I said it, almost nobody would believe it. And having no objective evidence would create an endless discussion!

Send it directly to Amirm , and do not make me fall into temptation.

 

[Matias]

@maty, which amplifier would you be sending to @amirm, if he accepts?

 

[maty]

The first, with Hypex NC500 and ALL buffers.

The second must be very expensive! Well, some people read car magazines/sites to know how good the last Ferrari was.

Later, according to how good Amirm was, the second

Just in case, I would accompany it with potica.
https://en.wikipedia.org/wiki/Slovenian_potica

Slovenian potica consists of a rolled pastry made of leavened paper-thin dough filled with any of a great variety of fillings, but most often with walnut filling. The most characteristic Slovenian poticas are made with ground walnut, tarragon, quark, hazelnut, pumpkin seed or poppy seed, salted ones even with cracklings or bacon, and other fillings...

Better than not, stop it at customs!

 

[Tks]

Tell me what. I must miss sugar. They call me to cook a fideuá. https://www.google.com/search?q=fideua

I love the way you talk sometimes

 

[Samoyed]

He scares my donkey.

 

[maty]

Off topic

My alter ego is so hungry that he is eating the person

[IMG, link] http://maty.galeon.com/portada/monster2.jpg

[Spanish] https://nauscopio.wordpress.com/200...okie-monster-cumple-40-anos-mi-avatar-solo-8/

https://en.wikipedia.org/wiki/Cookie_Monster

Me want cookie!

 

[Matias]

Here is a crappy picture of my NC800 SL with Sparkos Pro SS2590 opamps. Love it!

 

[maty]

I highly recommend reading this thread to anyone interested in the Hypex modules and the different buffers available.

Apollon architecture Hypex: NC800SL: retour d'expérience

[French] https://www.homecinema-fr.com/forum...ex-nc800sl-retour-d-experience-t30087239.html

to English:

* https://www.translatetheweb.com/?fr...ex-nc800sl-retour-d-experience-t30087239.html

* https://translate.google.com/translate?sl=fr&tl=en&u=https://www.homecinema-fr.com/forum/amplificateurs-de-puissance-haute-fidelite/apollon-architecture-hypex-nc800sl-retour-d-experience-t30087239.html

 

[maty]

Apollon Audio NC1200 SLM with Sonic Imagery 990ENH

https://www.apollonaudio.com/hypex-nc1200-monoblock-amplifier-apollon-audio-nc1200slm/

Picture optimized