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AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm

AUDIOPHONICS MPA-S75NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
The Audiophonics MPA-S125NC incorporates a Hypex Ncore NC122MP power amplifier module. This is a solid base to build a powerful stereo HiFi system, capable of delivering 2x75W under 8Ω.

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Audiophonics MPA-S125NC RCA

Power amplifier NCORE 2x75W 8Ω Black

Audiophonics MPA-S252NC RCA Amplificateur Stéréo Class D Ncore 2x150W 8 Ohm

An amplifier with solid performance

The Audiophonics MPA-S125NC incorporates a Hypex Ncore NC122MP power amplifier module.

This is a solid base to build a powerful stereo HiFi system, capable of delivering 2x75W under 8Ω.
On a single double-sided PCB it is composed of a low power supply for standby, a high-performance switching power supply but above all an extremely efficient Class D amplifier circuit.

The amplifier used on this NC122MP module offers a high efficiency of 92% and allows it to be used for very different uses, whether for studio use or to be integrated into a high fidelity audio system.

The distinctive characteristics of this amplifier are its linear frequency response whatever the load impedance and consequently its accurate restitution, its very low distortion but also its very low EMI radiation rate
The control of the amplifier is based on a self-oscillating loop with phase shift, taking into account the feedback only at the output of the loudspeaker, always with sound transparency in mind.

The main SMPS power supply to the amplifier is a regulated, high power, high efficiency half bridge converter with synchronous rectification on the main output rails. An ideal power supply to provide this Class D amplifier with the power it needs.
In order to be compatible with supply voltages of 100-120V and 200-240V, it is equipped with an automatic input voltage doubler.

POINTS CLÉS :

  • High efficiency
  • Load-independent flat frequency response
  • Low output impedance
  • Frequency-independant ultra low distorsion
  • Very low noise
Hypex NC122MP

NCore Technology

NCore amplifiers are the first Class D amplifiers to approach the performance of operational amplifiers, but also to surpass them in terms of sound reproduction quality. 
Thus, they are able to deliver a clear, rich and musical sound while remaining compact.

This NCore technology combines the stability of Hypex UcD series amplifiers with lower distortion and output impedance.

Amplificateur Ncore

100% Aluminium Housing

We integrate this Hypex NCore NC122MP amplifier in a 100% black brushed aluminum housing.

This case offers an elegant finish, the thick walls give it a great resistance, allowing it to protect components properly.
The natural conduction of aluminium, together with a studied air flow, allows the heat produced by the module to be dissipated.
In addition, the case is screen printed on the front with the NCore logo and on the back with the nomenclature of each input/output.

Its very compact format with a small width reduces space to a minimum, thus offering high performance in a small space.

This amplifier is DC pass-through , there are no decoupling capacitors at the input.
Be sure that your source is DC free before use.
The DC protection triggers at 12V DC, which is a quite high value.

In addition to the usual connection system, there is a trigger input on the rear panel. 
This 3.5mm jack input allows the module to be switched on with a DC voltage signal from 5 to 12V to synchronize it with a preamp having this type of output.
It is also possible to chain 2 amplifiers, and to switch on both simultaneously by controlling only one, the input being transformed into an output if the power button of one of the amplifiers is pressed.

Also present on the front is a diode relaying the status of the module, lighting up if a DC voltage is detected at the output.

Test Qobuz hypex PA s125 NC amp stereo Audiophonics

Discover the test by Qobuz

The MPA-S125NC (previously PA-S125NC) was the subject of a test from Qobuz.

Click here to read it.


Technical characteristics

Specifications
Amplifier typeClass D
Power2x75W 8Ω @ 1kHz THD=1%
2x125W 4Ω @1Khz THD=1%

2x 37W 8Ω @ 10Hz-20kHz THD=0.0015%
2x 62W 4Ω @ 10Hz-20kHz THD=0.0015%
THD+N0.0015%
SNR118dB
Output noise30µV
Frequency response10Hz - 50kHz
Efficiency92%
Gain25.5dB
Input sensibility125W 4ohm @ 1.17V RMS
Channels2 (Stereo)
TechnologyNCore
InputStereo RCA
Input / OutputTrigger 5-12V DC
OutputSpeaker connectors
General
Housing material100% brushed Aluminium
Power supplyMain : IEC (included cable)
Autoswitch (115 / 230V) US grid compatible
Trigger : Jack 3.5mm 12V (not included)
ColorBlack
Dimensions28.7 x 10 x 6cm
Weight1310g
 
Data sheet
InputRCA
OutputSpeaker terminal
ColorBlack
StructureAluminium
Channel2 channels (Stereo)
Accepts Banana PlugsYes
ClassClass D / T
Total Power (W)100-150
Power (max)75W
 
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Average votes
4.8 / 5
13 reviews
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Note :
 5/5
Date :
Impressionant
J'ai eu des amplis de classe A, de classe AB, à lampes, à transistors, à 500 euros, à 3000 euros.
Pour ne pas mourir idiot je me suis dit qu'il fallait que je teste un classe D. Après recherche je me suis dirigé vers celui-ci, les modules ncore semblants être parmi les plus réputés, en me disant qu'au pire il fera power pour mes arrières s'il est moyen.
Que dire... J'ai été bluffé !
Il se retrouve à amplifier des klipsh Cornwall depuis un an, et pas de changite en vue.
Les écoutes sont très naturelles, transparentes, avec des basses bien péchue et profondes, pas trainantes. Les aigus sont détaillés mais pas agressifs. Très équilibré, exactement ce que je demande à un ampli. Neutralité, transparence, pêche.
En plus c'est minuscule, ça ne prend pas de place, royal.
Du top, ne vous fiez pas au prix.
Pour du HR ça va impeccable, pour du rendement plus faible prenez la puissance supérieure si vous aimez les écoutes musclées.
Je recommande chaudement.
 (0)
 (0)
This review has been posted for AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
Note :
 5/5
Date :
Bill
Waited 2 weeks to be in stock, took 3 weeks to deliver.
I wanted to check out company and products.
Amp is first rate. You get what you pay for!
Very happy with it!
 (0)
 (0)
This review has been posted for AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
Note :
 5/5
Date :
Fred
Great performance! What goes in comes out. In combination with a good pre-amp you have a beautiful sound.
 (1)
 (0)
This review has been posted for AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
Note :
 4/5
Date :
Very nice companion for my KEF LS50
Previously I was using NAD D3020 (internally uses Hypex UcD102-based output stage) as amplification for my KEF LS50 speakers. I've purchased this amplifier as an "upgrade" to grant some more natural output to the speakers. I am quite satisfied with the result. This tiny amplifier drives full dynamics of the speaker with ease. The amplification / sound performance alone would be 5 star!

However, I am not totally happy with the chassis, and thus giving only 4 stars. It may be just my module, but I am having a tiny physical hum noise from the amplifier, near transformer side: This is tiny (i.e. tiny noise you can hear only within 50cm or so), and it is a typical 50hz mains hum. It comes out both in standby / on. Minor issue, since this is strictly on physical side, and not on signal side. So it isn't affecting output at all. However, I hate any such noise from my audio equipment. To identify further the exact source of the noise, I've opened the case (okay, warranty sticker removed and void now, but I don't care) and tried to identify which component is making this noise. But surprise surprise, the noise is gone when the top cover is off. I suspect some magnetic effect between one of transformer component with the enclosure cover. If the enclosure was slightly bigger, I guess this won't happen. Running with the cover-off can be very dangerous (NC122MP document shows front side of components with red color of dangerous voltages). So for the moment, I am with this hum. I am planning to do some DIY with a slightly bigger enclosure.

It would have been 120% perfect (?), if the module was supplied with a slightly bigger enclosure, with both XLR & RCA connection. Well, for this, 699 euro PA-S250NC is exactly that kind of stuff, but I didn't need that much gain for my current setup, so I am rather happy with this cheap-but-great amplifier.

Well, all in all, I am totally happy with it. Great job, Audiophonics, on providing one of the most economic NCore amplifier.
 (2)
 (0)
This review has been posted for AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
Note :
 5/5
Date :
Sans concurrence.
Finition et construction assez sommaire. Je regrette les connecteurs très exigus à l'arrière, ainsi que le placement: Les borniers devraient être en dessous des emphases RCA et non l'inverse. A noter que l'ampli est aux normes: Terre rattachée au châssis et phase bien à gauche de l'entrée IEC.

Ceci étant dit, cet ampli, qui est le moins cher du marché en Ncore (ampli monté) est tout juste excellent pour une entrée en la matière. Les chiffres mesurés parlent d'eux même: La majorité de la puissance est disponible en dessous de 0.005% de Distorsion Harmonique + Bruit, soit la limite théoriquement audible. Dans la pratique, cela ce ressent, on peut pousser l'ampli dans ses retranchements (sensibilité d'entrée max à 1.17V - 3.6 dBu). Tout en profitant d'une puissance particulièrement propre. Signature très neutre: pour les personnes qui n'attendent pas d'un ampli qu'il apporte une quelconque coloration (ce qui n'est, en aucun cas, le rôle d'un tel matériel).

Hautement recommandé. Je l'ai tellement apprécié que je ne pouvais pas en rester là! j'ai donc commandé deux PA-M250NC Mono pour aller plus loin en puissance disponible.
 (2)
 (0)
This review has been posted for AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
 
AUDIOPHONICS MPA-S125NC RCA Stereo Class D Power Amplifier NCore 2x75W 8 Ohm
The Audiophonics MPA-S125NC incorporates a Hypex Ncore NC122MP power amplifier module. This is a solid base to build a powerful stereo HiFi system,...

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