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MCRU 300b Monoblock Power Amplifier


One ex-dem pair to clear £1000 each (£2000 for the pair)

In stock



Mains Cables R Us 300b valve monoblock amplifier. Manufactured in the UK by Longdog Audio, a wholly English owned company who specialize in valve technology. Built to exacting standards in the UK, featuring fully regulated power supply and many unique features not normally assciated with a standard 300b. £3995 each, £7995 for a pair.

The amplifiers need to be heard to appreciate the sound quality, recently demo’d at the Bristol Show, the amplifiers can be sited within very short distances from your speakers thus negating the use of long speaker cables. One amplifier per speaker.  

The amplifier is a monoblock design, stereo version is available to special order. The monoblock is designed and built in the UK with a choice of finishes to suit individual requirements. The sound produced is nothing short of sublime. A well designed 300b will get to the heart of the music like no other amplifier anywhere near this price.

A pair of the amplifiers can be heard in my Huddersfield premises by appointment or I can visit you to let you hear them with your own pre-amp and speakers.

Additional Info

Additional information

Weight 25 kg

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