The Audiophonics AP300-S250NC is a stereo amplifier based on an amplification module Hypex Ncore NC252MP. This solution is ideal for anyone who wants to have a large power reserve (2x250W @ 4Ω) without sacrificing sound reproduction quality. This amplifier block will be suitable for example to accompany demanding speakers, to sound large listening rooms or for studio applications requiring a large headroom without compromising the accuracy and richness of the audio message.

All components are integrated in a simple and robust 100% Aluminium housing with openings to facilitate heat dissipation. Its design also allows it to limit the impact of interference on the signal.

Hypex Ncore NC252MP Amplification Board

The amplification circuit uses a module Hypex Ncore NC252MP. 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.

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 quality. As a result, they are able to deliver clear, rich, musical sound while remaining compact. This NCore technology combines the stability of the Hypex UcD series amplifiers with lower distortion and output impedance.

SMPS Power Supply

The NC252MP 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 NC252MP module also has an overload protection system.

Connectivity

The AP300-S250NC amplifier features a 2-pole stereo RCA input on gold-plated sockets, plus a 3-pole stereo XLR input for balanced signal processing. The XLR or RCA input source is selected via two switch buttons (right and left channel). The amplifier output is made on Elecaudio BP-209 24k gold-plated speaker terminals. They also accept banana plugs or spades for quick and easy connection. 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 is used to switch the unit on and off.

100% Aluminum Case and clean lines

The Hypex NCore NC252MP amplifier is housed in a 100% black brushed aluminum case. The thick walls of this elegantly-finished case are highly resistant, providing the components with the protection they need. The natural conduction of aluminum, together with a carefully designed air flow, helps dissipate the heat generated by the module. In addition, the acrylic front panel is screen-printed with the Audiophonics logo, and the rear with the nomenclature of each input/output. Its compact size makes it easy to integrate into any audiophile installation, offering high performance in a small space.

Measurement & performance curves

Click here to see the performance measurements of NCORE NC252MP. (Opens a new tab)