BMU

All things NVA
Andy-831
Posts: 101
Joined: Mon Aug 07, 2017 8:34 am
Great Britain

BMU

Unread post by Andy-831 » Fri Nov 24, 2017 9:30 am

Doc

Knowing you would answer this honestly could I ask a question about mains and the BMU.

I built a dedicated listening room 10 years ago and at that time I had the sparkie run a 10mm radial to 6 Unswitched MK sockets direct from the consumer unit to the listening room as a dedicated supply for the Hi Fi.

I never ever get any clicks pops or interference of any kind from other electrical items in the house, but because I live out on the moors I appear to be first dwelling off the transformer which is about 50m away in the next field up some poles, so my mains does run a bit hot at 248v. It has never been measured below or above this figure so is steady away at that value which I understand is within the allowable +/_ % variation allowed under EU law.

Given this scenario would the BMU bring anything to the party?

Andy
Analogue
301 / 3012 / 2m black
401 / PU7 / AT33ev / Highphonics SUT
Phono 2 + extra PSU
Digital
Vortexbox, SBT / Teac Dac
Cambridge CXC
Amps
Glasshouse TVC, P50 Sa or Quad 34/44
Quad 303; 606 or Bel Canto Set 40 or NG 300B Set Monoblocks
Speakers
Tannoy GRF Memory.
Q Acoustic 3020.

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Hemmo1969
Posts: 99
Joined: Sun Sep 24, 2017 11:57 am
Great Britain

Re: BMU

Unread post by Hemmo1969 » Fri Nov 24, 2017 9:42 am

Good points Andy, would like some more 'user info' on the BMU as I'm thinking of adding one myself.

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Dr Bunsen Honeydew
Posts: 26901
Joined: Wed Jul 11, 2012 7:26 pm
Location: Muppet Labs
Great Britain

Re: BMU

Unread post by Dr Bunsen Honeydew » Fri Nov 24, 2017 9:46 am

The BMU does two things. Its original purpose which is to take noise and DC out your mains feed into your system. The bigger effect that I didn't understand would happen and still don't know why it happens is the music takes a step up as well. So yes you will get benefit.. Side effect for you (if you want it) is I can get a special transformer made that is 230v in and 110v / 110v out so giving you a 10v drop in line voltage, it will put extra delay on delivery.

Andy-831
Posts: 101
Joined: Mon Aug 07, 2017 8:34 am
Great Britain

Re: BMU

Unread post by Andy-831 » Fri Nov 24, 2017 9:59 am

LOL

I really do not understand how that happens or even really what it means but bugger it I am going to try one.

Time delays are not a problem for me, either for a BMU or the Phono 2, just put me to the back of the queue if your inundated I am happy to wait.

Andy
Analogue
301 / 3012 / 2m black
401 / PU7 / AT33ev / Highphonics SUT
Phono 2 + extra PSU
Digital
Vortexbox, SBT / Teac Dac
Cambridge CXC
Amps
Glasshouse TVC, P50 Sa or Quad 34/44
Quad 303; 606 or Bel Canto Set 40 or NG 300B Set Monoblocks
Speakers
Tannoy GRF Memory.
Q Acoustic 3020.

User avatar
Dr Bunsen Honeydew
Posts: 26901
Joined: Wed Jul 11, 2012 7:26 pm
Location: Muppet Labs
Great Britain

Re: BMU

Unread post by Dr Bunsen Honeydew » Fri Nov 24, 2017 10:09 am

Do you want the voltage drop.

Andy-831
Posts: 101
Joined: Mon Aug 07, 2017 8:34 am
Great Britain

Re: BMU

Unread post by Andy-831 » Fri Nov 24, 2017 10:12 am

Yes please I have sent an email via Ebay
Analogue
301 / 3012 / 2m black
401 / PU7 / AT33ev / Highphonics SUT
Phono 2 + extra PSU
Digital
Vortexbox, SBT / Teac Dac
Cambridge CXC
Amps
Glasshouse TVC, P50 Sa or Quad 34/44
Quad 303; 606 or Bel Canto Set 40 or NG 300B Set Monoblocks
Speakers
Tannoy GRF Memory.
Q Acoustic 3020.

Lupus-Dei
Posts: 17
Joined: Sun Nov 26, 2017 10:29 am
Romania

Re: BMU

Unread post by Lupus-Dei » Sun Dec 03, 2017 1:50 pm

I am very much looking forward to experimenting with the BMU, and hopefully of experiencing similar benefits as reported by adopters currently running with one of Richards units.

My mains as of the present have Source and Pre powered via an Power Inspired AG-1500 with my Mono Blocks running through a Schuko distribution box via an Isotek Titan II.

I would be most interested the hear from BMU users as to how they have configured a BMU into their own systems, whether in isolation or in combination with other mains related products or equipment.

As matters stand I shall have a number of connection options and combinations with which to play around with.

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_D_S_J_R_
Posts: 3690
Joined: Mon Feb 03, 2014 9:53 am
Location: The end of the road.
Wales

Re: BMU

Unread post by _D_S_J_R_ » Sun Dec 03, 2017 4:32 pm

You shouldn't need all that shit to listen to music at home, but I do admit an awful lot of areas have worse mains quality than ever and the gear isn't as immune to it as one would like.

Here on the coast, the mains seems pretty consistent day to day (it wasn't in Luton I remember) and the BMU was a luxury really. It DOES seem to help though - and not just on NVA amps either! - and here it stays..

My take on mains regenerators is that they're trying to shut the door after the horse has bolted. Just my take and not all of us have huge spending money to buy a large enough one. The BMU is about as cost-effective as I reckon most would need and it looks acceptable out on show as well, which I don't think others do...
...I have renounced the worldly bustle and live in peace at a quiet place,
I live alone in this my heaven, in my love (and) in my songs.

Lupus-Dei
Posts: 17
Joined: Sun Nov 26, 2017 10:29 am
Romania

Re: BMU

Unread post by Lupus-Dei » Sun Dec 03, 2017 7:25 pm

Well......All part of the experiment, there are well founded reasons both measurable and subjectively audible as to why I run my incumbent PS rig, I have not been at this mains tuning lark in my listening room all of two mins David.

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kimangelis
Posts: 530
Joined: Tue Jul 08, 2014 9:01 pm
Location: Stow, Scottish Borders.
Great Britain

Re: BMU

Unread post by kimangelis » Mon Dec 04, 2017 6:52 pm

Makes a real difference to me. Rural location and mains sort-of OK. After about three months of having the BMU in my system, I tried without... for about 15minutes then re-instated the BMU.... I don't have Golden Ears by a long chalk, but the difference was marked.
Primare CD22. Primare DAB/FM radio. NVA TCS. AP10H(JS), with Denon AH-D7100's. A70 MkII's. Cube2's. LS7. BMU. Interconnects all TIS.

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