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NVA Balanced Mains Unit (BMU)

Normal mains is single ended. By changing this to balanced you remove noise and distortion from the mains by out of phase noise cancellation (like noise cancelling headphones). This is done by using a balanced line transformer to deliver the signal, in this case AC mains. It plugs in the mains wall socket and acts as a distribution box to four separate sockets mounted on the top of the unit, these can be used the same as any mains socket.

The major benefit goes beyond this though as the BMU frees up your amplifier and sources to deliver a far cleaner and more musical signal to your speakers.

This is very much a try and be shocked by the benefit product so our 30 day trial / refund period is important to give customers confidence.

So far none have been returned.


"At the risk of 'gushing' now I've experienced what the NVA balanced mains unit can bring, I'm not not wholly sure I'll be happy to live without it."

Professional Musician

Return Policy Text
Return Policy


"I've now had a chance to have a decent listen with this in the system (I have all the amps plugged into it, previously they were plugged into a couple of two gang extensions - not standard mains but screened 4mm cable). As ever, I think I'll really find out what it is doing when I take it out of the system.

But for the moment my conclusion is that it improves just about everything. The music is more 'in the room', the soundstage is bigger, there is more distinction between the different performers and parts to the music, each bit of the music has some more of it's own character, there's more dynamic range, little grace notes and pushes to the music are more apparent, the highs and the lows are clearer."


"I would suggest that if you have a mains noise problem, an AC regenerator is definitely worth a try. However, if you are looking for musical gain then you should first try a BMU. Prepared to be shocked however, as this gain is of very surprising magnitude."

Important Information - Read Before Ordering

Please note all NVA products are built to order so therefore there will be a delivery delay as the production and testing is scheduled. Average delivery time is five to seven days but can on occasion go to 10-14 days depending upon order pressure.

NVA offer a 100% trade in value on our products. If you trade up within the NVA range of products within two years of your purchase date (only applicable to direct sales from us or through eBay). After that date we will still trade in your item but on a sliding scale as to age and condition of the item. You must print out and keep your eBay receipt or invoice to verify your purchase date.

This service and offer is quite unique in the world of audio and hifi.