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AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm

AUDIOPHONICS PA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
The PA-S250NC is a large single mono dual amplifier designed to meet power and precision requirements. Based on a duo of Hypex NCore NC250MP modules, this Class D amplifier is extremely efficient thanks to two switching power supply units with synchronous regulation.

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Reference : 13545
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582,50 €tax excl.

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Availability date: 2020-06-22

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AUDIOPHONICS HPA-S250NC

Stereo Class D Amplifier NCore 2x250W 4 Ohm

AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm

The HPA-S250NC is a large single mono dual amplifier designed to meet power and precision requirements. Based on a duo of Hypex NCore NC250MP modules, this Class D amplifier is extremely efficient thanks to two switching power supply units with synchronous regulation.

Like the vast majority of amplifiers based on NCore amplification modules, the frequency response is independent of the load and electromagnetic interference is strictly controlled, significantly limiting distortion and noise. The HPA-S250NC will therefore be particularly appreciated in all conditions requiring high amplification power while maintaining a high degree of neutrality in signal reproduction. It will find its place in a professional studio as well as in a private home for high fidelity listening.

Two NC250MP Mono modules

Each channel has its own Hypex NCore NC250MP amplification circuit, capable of delivering no less than 250W each. They are characterized by a flat frequency response regardless of impedance, almost totally frequency independent distortion, very low EMI radiation and a very low noise level. The control is based on a self-oscillating loop controlled by phase shift, taking into account the feedback at the output of the loudspeaker.

The SMPS power supply integrated in each of these amplifier circuits ensures high efficiency and synchronous rectifier control on the main output rails. As the power supplies are specific to each NCore module, the sound scene is refined and the dynamics preserved, without causing any additional distortion.

The internal wiring used to build the HPA-S250NC amplifier includes OCC Copper conductors with a cross-section of 2.5mm², in order to benefit from excellent conductivity and preserve all the subtleties of the signal and, in short, the quality of the sound reproduction.

AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm
AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm

Switchable inputs on RCA and XLR port

This power amplifier has two RCA input ports (double mono) and two XLR ports (double symmetrical mono). The RCA bases are 24k gold plated with a heat resistant plastic cap.

XLR connectors are high quality Neutrik connectors with metal locking latches and gold-plated contacts.

A two-position switch allows you to switch between XLR and RCA input easily. This will allow two different preamplifiers to be connected to it and the input sources to be alternated.

High quality speaker terminals compatible with banana plugs

The HPA-S250NC has two pairs of 24k gold-plated speaker terminals on its rear panel. These terminals are designed to receive banana plugs up to 4mm in diameter. The latter will also be able to accommodate bare wires thanks to a 5.3mm diameter slot that can be locked by screws.

AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm
AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm

Trigger 5-12V

A trigger plug provides the comfort of an ignition sequence and allows for a very complete integration into your audio installation.

The power supply input is via an IEC C14 socket with gold-plated copper conductors. The latter works with a 5x20mm 3.150A fuse (supplied and already installed).

Heat dissipation

Because it is capable of developing high power, the HPA-S250NC will be subjected to certain thermal stresses during its use. Heat management is a key issue to achieve a high level of audio performance and keep distortion below a controlled threshold.

For this reason, each amplifier module is mounted on a large radiator capable of efficiently dissipating heat. Similarly, carefully distributed ventilation holes will promote air circulation and heat evacuation.

AUDIOPHONICS HPA-S250NC Amplificateur Stéréo Class D NCore 2x250W 4 Ohm

Technical characteristics

Specifications
Product typePower amplifier
ClassD
Channels2 (Dual Mono)
Inputs2x RCA
2x 3 poles XLR
OutputSpeaker terminal
TechnologyNCore
Power2 x 180Wrms @ 2 Ohm 1kHz THD=1%
2 x 250Wrms @ 4 Ohm 1kHz THD=1% @1.66V RMS
2 x 130Wrms @ 8 Ohm 1kHz THD=1%
THD+N0.0015 - 0.0024%
SNR121dB @ < 10Hz-20kHz
Output noise30µV
Frequency response10Hz - 50kHz (+0/-3dB)
Trigger5-12VDC
Gain25.5dB
Efficiency (Full power)92%
General
Power supply100-240V
Automatic detection of the input voltage
Electric consumption (full power)2x350W
HousingSandblasted Aluminium
Dimensions413 (Width) x 322 (Depth) x 60mm (Height)
Weight5.1kg
Package1x HPA-S250NC Amplifier
1x Angled power cable 3x1.5mm² 1.8m
 
Data sheet
InputRCA
InputXLR
OutputSpeaker terminal
ColorBlack
ChannelDual Mono
Accepts Banana PlugsYes
ClassClass D / T
HeatsinkYes
 
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Average votes
4.5 / 5
6 reviews
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Note :
 5/5
Date :
Must have amplifier!
I have ordered 2 of these amps as I have a 4.0 setup (Nubert nuVero 140 in the front and nuVero 50 in the back)
I have replaced a Crown CT8150 amplifier that I previously had

I must say that it was definitely an "awwwwwwe" experience when I first listened to these beasts....the sound is totally amazing
It is as transparent as possible, it sounds as clean as I have never heard before (not just at home but also anywhere else)
The words "dynamic range" and "stage" have a new definition now: Hypex
Space has opened up in all 3 dimensions but in a scale I still cannot believe
Also it is worth noting that I hear instruments/sounds that I have not heard before - and believe me it is not my imagination playing tricks with me...
Warning: If you are looking for "warm" sound and all that audiophile BS please do not buy these amps as the are fully linear; they will not add any coloration or distortion; they will produce exactly what is in the recording - and that is what a proper amplifier should exactly do!
I am extremely satisfied and I would very strongly recommend these amps to anybody looking for a dynamic, linear and transparent sound
A side note: I have asked Audiophonics to remove the RCA inputs and the input selector switch which they did so congratulations to them for being flexible and customer-oriented
Thank you
 (2)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
Note :
 5/5
Date :
Excellent performance for the price
I purchased this amplifier for a pair of Kef LS50, small but a bit difficult speakers in terms of amplification (85 db sensitivity, 8 Ohm), replacing an integrated class A amplifier with 50W/ch @ 8Ohm. At a normal listening volume, the sound is richer, bass is more defined and the dynamic is much improved; the sound is detailed, balanced and non-fatiguing. Construction is good and the aluminum case is very solid.
As written in another review, I confirm that the device, when connected to the electrical grid, emits a slight buzz; however the noise is really weak and audible only if you are very close to the amp in a completely silent room (anyway for me it’s not a problem because I usually disconnect from the electrical grid all my HiFi devices when I'm not using them, simply switching off the power strip ).
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
Note :
 5/5
Date :
Excellent value for money
I have a pair of NC-400 based mono kit (built by own) , Ucd3xMP amplifiers for my own.
And I imported some NCore based amplifier for my friends.
This PA-S250NC is excellent!
- rigid body makes this well frequency reproduction balance
though not easy to open top plate... I had to struggle with many screws...
This amplifier may use uniiversal amp chassi but better than most of amps in this price class or upper class.
- Well considered simple construction
Simple and it seems easy to maintain.
- Good sound from initial
I have checked with
Source : 60000 tunes on NAS read by Win10 Pro 64bit rev1903 /foobar2000
DAC: XMOS ES9018K2M USB DAC (Headphone output to use volume knob)
Amp: this one
Speaker : All Accuton based 3way (built by own )
Accuton C173-6-191E woofer 17cm mid-bass
Accuton C50-8-044 Mid-range 50mm mid
Accuton C30-6-358 Tweeter

Bass is apparantly improved.Voice (Mid) range has distortion-less clear and smooth and silky high strings.
 (1)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
Note :
 2/5
Date :
Belle dynamique mais écoute fade et ennuyeuse
Cet ampli est assemblé dans un beau boitier sobre et solide.
à l'écoute sur des JBL 4430, avec une digione signature en source, il drive parfaitement les 38cm, normal avec un facteur d'amortissement aux environ de 1000.
Je me suis emballé au départ, séduit par la plage dynamique qui explose tous les amplis de classe A-B.
Après 48h d'écoute, repassant sur mon Audio Gd Master 3, je me suis rendu compte immédiatement à quel point le Ncore 250 était fade, trop mat, manquait de détourage sur les voix et les instruments, en un sens "normalisait" la musique, finalement je suis déçu par cette signature plutôt ennuyeuse.
Sur le papier il est redoutable, au niveau émotionnel, il ne m'a pas touché.
Attention : les modules Hypex vibrent en émettant un buzz comparable à un petit néon, émanant du boitier, même l'ampli éteint, il faut le savoir si vous projetez de l'installer dans une pièce par exemple dans laquelle vous dormez.
 (5)
 (1)
This review has been posted for AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
Note :
 5/5
Date :
Excellent amp, fantastic service.
Not only is this amplifier a superb product in terms of sound age build, Audiophonics themselves have been a pleasure to deal with in every instance, always attentive to queries and happy to help resolve issues.

I’ve used this amp alongside an SMSL SU8 DAC and Neat Iota speakers, and have been extremely happy with the results. Bass is right and full, and separation of instruments, as well as their placement in a well defined soundstage, is excellent. I also really love the speaker terminals and overall design. Very nice for the money. A huge recommend from me!
 (1)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
 
AUDIOPHONICS HPA-S250NC Stereo Class D Amplifier NCore 2x250W 4 Ohm
The PA-S250NC is a large single mono dual amplifier designed to meet power and precision requirements. Based on a duo of Hypex NCore NC250MP...

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