Усилители мощности стерео — Exposure 3510 Stereo Amplifier

The 3510 Stereo Amplifier is a stereo power amp made by Exposure, a British company building hi-fi electronics since 1974 and based in Lancing, West Sussex, where this unit is designed and manufactured. It belongs to the 3510 series, which Exposure introduced in 2021 to take over from the long-running 3010 generation, and it sits beside a 3510 preamplifier, an integrated model, mono power amplifiers and a CD player. Technology in the 3000 family is handed down from the higher 5010 range of the same company. The UK price was GBP 2,400 and the Canadian price CAD 4,599, and the guarantee covers three years.

Key specs that matter

Each channel is rated at 110 W RMS into 8 ohm at 1 kHz with harmonic distortion under 0.015% at full output. Exposure specifies 20 Hz to 20 kHz within 0.5 dB, noise more than 100 dB below rated output and channel separation greater than 60 dB across the audio band. Full power is reached with 1.85 V at 1 kHz at the input, which presents an 18 kohm load to the source. The chassis is 440 mm wide, 115 mm high and 300 mm deep, and it weighs 12 kg net or 14 kg in its carton. Consumption stays below 400 W with both channels driving 8 ohm, and the mains voltage is fixed at the factory for either 110/120 V or 220/240 V regions.

Engineering and use context

Each channel carries two pairs of Toshiba bipolar output transistors, and the linear power supply draws on a custom toroidal transformer of the same large size used across this tier of the range. Signal-path capacitors are specified to a higher grade than generic parts. There are no controls on the front panel at all, since the company decided a power amplifier needs none. The case is all aluminium with an extruded front panel, finished in black or titanium to match the rest of the series. Speaker cables connect to shrouded terminals arranged in two pairs for bi-wiring, and they accept 4 mm banana plugs only, so spade lugs and bare wire cannot be used.

Pairing

The input sensitivity suits the 3510 Pre-Amplifier or any line-level control unit with a variable output. Exposure intends the amplifier to be added to its 3510 Integrated Amplifier for bi-amping, where the integrated drives one set of drivers and this unit the other through the split terminals, a setup the company proposes for loudspeakers that present a difficult load.

Alternatives

The Exposure 3010S2 Stereo Power Amplifier is the preceding class AB model from the 3010S2 series, built with all-discrete components in a full-width case.