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Connecting monoblock tube amps to single subwoofer.

Hi all,

I have added a REL5TX sub to my system which is driven by VTL225 monoblocks.Currently the sub and amps are connected via the low level outputs on my preamp. I would prefer to use the high level connection to the REL by direct  connection to the the VTLs. I am concerned about creation of a ground loop that will cause hum on the system. I have been told that the ground loop can be avoided by running a ground wire directly between each amp. Is this a possible solution, and if so, where / how should the ground "jumper" be connected to each monoblock?

Many thanks in advance for any comments or suggestions.

128x128rbanathy
lak's avatar
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lak
4,579 posts
 

YOu should find your answer within the following. REL does a really good job of providing a lot of how-to information.

 

hilde45's avatar
hilde45
4,974 posts
 

I went through exactly this question. REL basically warns people away from doing this, but I got expert advice on Audiogon from Almarg (RIP), that the high level connection can work.

I have two quicksilver tube monoblocks. I connect the REL speakon wires thus:

RED wire to RIGHT POSITIVE on Monoblock 1

YELLOW wire to LEFT POSITIVE on Monoblock 2

BLACK wire to LEFT NEGATIVE on Monblock 2.

There is no hum, for me. YMMV. If I were you, I'd contact VTL. 

Please see this discussion:

 

mike_in_nc
1,136 posts
 

Please let us know what you think after you've tried it. Though REL has pushed hard on the idea of speaker-level connections, I am doubtful that it provides any demonstrable benefits.

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