AUDIOPHONICS MPA-S250NCX XLR Power Amplifier Class D Stereo Ncore NCx252MP 2x250W 4 Ohm

Hypex Ncore NCx252MP Amplification Board

The amplification circuit uses a module Hypex Ncore NCx252MP. It is a versatile, high-performance Class D amplifier. It offers a very comfortable power of 2x150W at 8Ω while taking advantage of the high efficiency of Class D amplifiers.

Its main characteristics are its flat frequency response regardless of load impedance, its almost frequency-independent level of distortion and its ability to reject EMI interference. Its operation is based on a self-oscillating loop controlled by phase shift and taking into account feedback only at the speaker output.
Audiophonics MPA-S252NCX XLR Amplificateur Stéréo Class D Ncore 2x150W 8 Ohm

Audiophonics MPA-S252NCX XLR Amplificateur Stéréo Class D Ncore 2x150W 8 Ohm

SMPS Power Supply

The NCx252MP module also integrates the amplification stage. This consists of a regulated half-bridge switching power supply (SMPS) with synchronous rectification on the main output rails. Compact, powerful and efficient, this power supply is particularly suitable for supplying a Class D amplifier cleanly.

In addition, to offer complete compatibility with the voltages delivered by the various electrical networks, the power supply is equipped with an automatic input voltage doubler. The NCx252MP module also has an overload protection system.

Connectivity

The MPA-S250NCX amplifier has a 3-pole stereo XLR input on Neutrik NC3FAV2 sockets. The amplifier output is made on Elecaudio BP-209 24k gold-plated speaker terminals. They also accept banana plugs or forks for quick and easy connections. A 5-12V trigger connector in 3.5mm Jack format allows to control the automatic ignition of the amplifier when integrated in a compatible system. Finally, a bistable button allows the device to be switched on.

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

Specifications
Product type	Amplifier
Class	D
Number of channel	Stereo (2)
Max. power (@ 1kHz, THD=1%)	2x150W @ 8Ω 2x250W @ 4Ω 2x180W @ 2Ω
Input	1x Balanced Stereo XLR
Output	Speaker terminals
Trigger	5-12V
THD+N	0.0015%
SNR	121dB
Output noise	30µV
Output impedance	1.5mΩ
Frequency response	10Hz - 50kHz
Efficiency	92%
Input sensitivity	Max Power at 1.66V RMS (2x0.83V MRS)

Specifications

Product type

Amplifier

Class

Number of channel

Stereo (2)

Max. power (@ 1kHz, THD=1%)

2x150W @ 8Ω
2x250W @ 4Ω
2x180W @ 2Ω

Input

1x Balanced Stereo XLR

Output

Speaker terminals

Trigger

5-12V

THD+N

0.0015%

SNR

121dB

Output noise

30µV

Output impedance

1.5mΩ

Frequency response

10Hz - 50kHz

Efficiency

92%

Input sensitivity

Max Power at 1.66V RMS (2x0.83V MRS)

General
Supply voltage	230V / 110V (automatic switch)
Case material	Brushed Aluminium
Total dimensions (WxDxH)	145 x 355 x 64mm
Weight	1860g
Color	Black
Package	1x Audiophonics MPA-S250NCX XLR 1x Power cable

General

Supply voltage

230V / 110V (automatic switch)

Case material

Brushed Aluminium

Total dimensions (WxDxH)

145 x 355 x 64mm

Weight

1860g

Color

Black

Package

1x Audiophonics MPA-S250NCX XLR
1x Power cable

Input	XLR
Output	Speaker terminal
Color	Black
Channel	2 (Stereo)
Class	Class D / T
Amplifier chip	Hypex Ncore
Power (W)	150.0
Remote Control	No

excellent quality
MPA-S250NCX in my hand, looks really good. The brushed metal and build are excellent.

Interior had 2 minor issues: (while every cable was routed as in pics), i would have hoped this to have a little longer power cord, routed around the board (like rca-version pics show), what is less than a € of cost-or-price added to this product...

second: one of the xlr input cable wires weren't fully seated in the plug. fix was to just unplug, push the wire fully in and plug it in again.

Other than that, soldering, twisting and wire routing was very good!

Product works as expected and sounds neutral.

i gave 4 stars, bc of the mentioned small imperfections in my book.

but overall great, robust and really beatiful looking product, i want to really emphasize the case sturdiness (no flex) and especially it's looks, these picture here don't do justice how it looks in person.

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