Усилители мощности стерео — Einstein Audio Components The Poweramp

The Poweramp is a stereo power amplifier from Einstein Audio Components, the German manufacturer based in Bochum that designs and hand-builds its electronics in-house. Einstein is known for keeping products in its range for many years and replacing them only when a new design brings a real technical step, and The Poweramp was introduced as the successor to the company's The Light In The Dark amplifier.

Key specs that matter

The amplifier is rated at 90W per channel into 8 ohms, rising to 140W into 4 ohms. Signal-to-noise ratio exceeds 100dB, distortion is below 0.01% and the damping factor is above 250. The chassis measures 430mm wide, 170mm high and 410mm deep, and weighs 21kg.

Engineering and use context

The combination of a heavy chassis with a moderate power rating indicates a design built around a generously sized power supply and heavy chassis rather than maximum output figures. The rise in output as impedance halves shows that the supply keeps delivering additional current into lower loads, even if it does not quite double. The high damping factor means the amplifier's output impedance is very low compared with the loudspeaker's, which gives it firm electrical control over the bass drivers and keeps the speaker's own impedance variations from altering the frequency response. The noise and distortion figures put the design in the low-noise, low-distortion class, which matters with high-sensitivity loudspeakers where amplifier noise becomes audible at the listening position. Einstein uses single-ended circuitry, and the design drew on the company's mono amplifier The Silver Bullet OTL, whose approach it brings into a stereo chassis. Einstein builds each unit by hand in Germany, in a full-width chassis that fits standard equipment racks. Its long product life cycle means buyers can expect support and continuity rather than rapid model changes.

Pairing

As a power amplifier, The Poweramp needs a preamplifier, and Einstein's own preamplifiers are the natural partners for a matched two-box system. The moderate power ratings suit loudspeakers of average to good sensitivity in medium-sized rooms, while very low-sensitivity designs with difficult impedance curves are better served by more powerful amplifiers. Its high damping factor makes it a good match for loudspeakers whose bass tuning relies on tight amplifier control.

Alternatives

Einstein Audio Components' own The Silver Bullet OTL is an output-transformerless mono power amplifier for buyers who want one chassis per channel.