AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 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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Shipping date: 05-03-2024.

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AUDIOPHONICS HPA-S250NC

Stereo Class D Amplifier NCore NC250MP 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).

This amplifier's trigger needs to be used with a mono trigger cable (sold separately).

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%
Input sensitivityMax Power at 1.66V RMS
XLR : 2x0.83V RMS
RCA : 1.66V RMS
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
 
Data sheet
InputRCA
InputXLR
OutputSpeaker terminal
ColorBlack
Channel2 (Stereo)
ClassClass D / T
Amplifier chipHypex Ncore
Power (W)250.0
Remote ControlNo
 
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Average votes
4.6 / 5
11 reviews
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Note :
 5/5
Date :
fabrication de qualité
un peu plus encombrant que je ne l'avait imaginé, mais a la sortie quel merveille, ne chauffe pas même après une journée d'écoute et le son est tout simplement parfait !
j'éprouve a nouveau le grand frisson
Merci Audiophonics
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 2x250W 4 Ohm
Note :
 4/5
Date :
Incoparable value for money
The amp is everything you want and expect: clear, detailed, airy, neutral, but not in your face. Strong basses, tamed highs and well textured mid-range. I have it paired with a Conrad-Johnson CT-6 and Piega PL-XL4.
I observed a noticeable difference, however, when using the XLR inputs instead of RCA, even though, I am using an adaptor.
Superfast delivery, another happy customer!
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 2x250W 4 Ohm
Note :
 5/5
Date :
Agréablement surpris
Commandé le vendredi, livré le lundi : peut difficilement faire mieux !! Emballage de qualité. Très agréablement surpris de la qualité de fabrication, c'est du solide et du lourd, montage bien ajusté. Pour la qualité audio, premiere impression très positive, c'est dynamique, le grave est bien présent. Pour ceux qui trouve que c'est fade, le coupable c'est pas l'ampli mais l'acoustique de votre pièce d'écoute qui n'est pas au top, ce qui peut se corriger en actif et ou passif.
Eric
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 2x250W 4 Ohm
Note :
 5/5
Date :
A : Stephane B
J'ai fait la même expérience que vous, au départ l'ampli semble merveilleux partout, mais manque de relief, de tessiture, et devient vite ennuyeux. Fonctionne mieux dès qu'il est mis en route, soit froid, ou fatigue auditive, je ne saurais pas répondre.
Ces amplis semblent exceller dans le grave, c'est l'utilisation que j'en fais à présent.
Associez le à un Mosfet classe A pour la section médiums/aigus, ou carrément atteignez le nirvana en l'associant à des amplis type SE en 45, 2A3, 300B, 811, 845. en fonction du rendement de vos haut-parleurs, et de vos goûts musicaux.
 (1)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 2x250W 4 Ohm
Note :
 5/5
Date :
Excellent performance and well built
Excellent performance. Transparent, fast, with no specific sound signature. Impressive accuracy in sound timbre and decay, noticeable especially in percussion (cymbals) and piano. Wide and steady soundstage. In my setup drives a pair of Magnepan 1.6.

Nice and well built assembly. My only complain is the absence of indications (e.g. XLR/RCS) on the input switch selectors at the back plate. I haven't noticed any hum or similar noise when it is switched off but remains on power. In any case I switched off the power strip when not used.

Concerning the shipment, very good packaging but quite long delivery time with TNT (a whole week).
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 2x250W 4 Ohm
 
AUDIOPHONICS HPA-S250NC Power Amplifier Class D Stereo NCore NC250MP 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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