Усилители мощности стерео — Ayre Acoustics VX-R TWENTY

The VX-R Twenty is a two-channel Ayre Acoustics power amplifier, offered in its current finale version that received an updated input stage in 2026. It has no volume control or source switching of its own and is meant to be driven by a separate preamplifier, and it uses a discrete balanced signal path that operates with zero feedback.

Key specs that matter

Continuous output is 200 W per channel into 8 ohms and 400 W per channel into 4 ohms. Gain is fixed at 26 dB, and the balanced input presents 2 megohm, or 1 megohm per phase. Bandwidth is specified as DC to 250 kHz. In standby the amplifier draws 45 W, rising to 200 W when operating with no signal. The chassis is 438 mm wide, 476 mm deep and 95 mm high, and the unit weighs 35 kg.

Engineering and use context

The linear analog AyreLock power supply is built with two transformers, which Ayre describes as sized to cope with difficult loudspeaker loads. In the finale update the supply capacitance was raised by 33.3 percent, and the revised input stage was introduced at the same time. The output section uses the Ayre Double Diamond topology, and the EquiLock technology developed by the company is used alongside it. The circuit boards use an ultra-low loss material, and the parts list includes custom audio-grade resistors and polystyrene capacitors made to Ayre's own specification. The Ayre Conditioner, a line filter at the power inlet, is intended to reduce radio frequency and electromagnetic interference arriving through the power line. The AyreLink communication system allows the amplifier to be switched on and off together with other Ayre components that carry the same link. The smaller VX-5 Twenty has the same gain and bandwidth, while the VX-R Twenty is the heavier of the two by 11 kg.

Pairing

Since the amplifier accepts a balanced signal into a very high input impedance, it is best partnered with a preamplifier that has balanced outputs, and Ayre's own KX-5 Twenty and KX-R Twenty preamplifiers provide both XLR outputs and AyreLink control. The doubled power into lower impedance gives substantial reserve for loudspeakers that present a low load, and the fixed gain matches the output levels of typical line preamplifiers.

Alternatives

The Ayre VX-5 Twenty is another stereo power amplifier in the Twenty line rated at 175 W per channel into 8 ohms and 350 W per channel into 4 ohms, weighing 24 kg.