Classé unveils entry-level Sigma Mono amplifier

The Sigma Mono’s power output is rated at 350W into 8 ohms and 700W into 4 ohms. Classé says it benefits from its proprietary Sigma amplifier designs, but in an even higher performance package.

Dave Nauber, president of Classé, says the new amplifier will produce a “pure, effortless sound” thanks to a “massive switch mode power supply”.

Important parts of the amplifier’s circuitry “surpass what is available in the two- or five-channel Sigma models,” he added.

The Sigma Mono features a new analogue input stage, modifications to the operation of the output stage and new output filters designed to improve the overall performance of the mono amp.

A pass-through feature allows the input signal to be passed on to a second amplifier for a bi-amplifier set-up. Alternatively, it can drive a subwoofer amplifier.

A sample set-up could see a preamp connected to a Sigma Mono, then connected to a second unit. A third, or even fourth, Mono could also be used.

According to Classé, the Mono is “the logical choice for anyone who wants the highest performance and prefers a compact, highly energy efficient design”.

The Sigma Mono will be available from October, priced $4000.

MORE: Classé launches entry-level Sigma range

Max Langridge

Max is a staff writer for What Hi-Fi?'s sister site, TechRadar, in Australia. But being the wonderful English guy he is, he helps out with content across a number of Future sites, including What Hi-Fi?. It wouldn't be his first exposure to the world of all things hi-fi and home cinema, as his first role in technology journalism was with What Hi-Fi? in the UK. Clearly he pined to return after making the move to Australia and the team have welcomed him back with arms wide open.

Latest in Stereo Amplifiers
Audiolab 6000A MkII amplifier in silver
Audiolab upgrades its five-star 6000A amplifier with a new DAC chip, enhanced circuitry and HDMI ARC
WiiM Vibelink Amp stereo amplifier
WiiM's Vibelink Amp stereo amplifier officially launches – with ultra-competitive pricing
Gryphon Audio Diablo 333 integrated amplifier
Gryphon Audio Diablo 333
Roksan Atessa Streaming Amplifier in black finish on wooden rack
Roksan’s stylish Attessa Streaming Amplifier is rocking a cool £300 off thanks to this juicy deal
Audio Research Reference 330M floating on a black background
Audio Research’s new flagship monoblock power amp is a serious high-end powerhouse
WiiM Vibelink Amp and WiiM Ultra
The WiiM Vibelink Amp is WiiM's first integrated amp with no streaming elements
Latest in News
Audiolab 6000A MkII amplifier in silver
Audiolab upgrades its five-star 6000A amplifier with a new DAC chip, enhanced circuitry and HDMI ARC
Qobuz
Qobuz reveals average payout per stream – and claims it is higher than rivals
Sonos Beam Gen 2
Quick! This five-star Sonos Dolby Atmos soundbar has dropped close to its lowest price
The Google Pixel 9a being held horizontally at waist-height so only the back is visible.
The Google Pixel 9a launches at £100 less than the iPhone 16e with a better screen
A woman flicking through stacks of vinyl records in a Rough Trade shop.
Vinyl records and music streaming both hit landmark highs – but the one growing faster in revenue may surprise you
Vertere DG X turntable in black finish
Vertere's gorgeous DG X turntable features significant updates for a more refined performance overall