A question for Dave (OBBM)

[GreeneKing]

I was about to email Dave this question and thought that it may be of interest to other folk so here it is:

I'm setting up a new amp with a Summit Audio valve pre and a QSC RMX 850 power amp. In bridge mode the output of the amp is Speakon Pos +1 and Neg +2. Will the standard made up cable accommodate this okay or do I need a special cable made up for this? (I'll be ordering some new cables either way).

I've tried the amp at home semi detached cottage volumes and it sounds very warm indeed Nicely so.

Peter

[obbm]

At the time that your QSC was made there was only chassis-mount Speakon available was the 4-pole. More recent amps are now using a chassis mount version of the 2-pole Speakon.

Many Speakon to Speakon cables use the 2-pole Speakon connector as most amps and cabs only use terminals 1+/1- of the chassis mount 4-pole Speakon.

To tap into the bridged mode of your amp you need a 4-pole Speakon at the amp end of the cable, so either

a 4-pole Speakon (wired 1+/2+) to a 2-pole Speakon (wired 1+/1-)

or

a 4-pole Speakon (wired 1+/2+) to a 4-pole Speakon (wired 1+/1-)

will do the trick.

Hope I haven't confused.

[GreeneKing]

Not at all Dave, I'll order one the right length and connectors and some other stuff I need sometime today

Is the 2 pole Speakon different in appearance to the 4 pole? If so it would help in identifying which end is which.

Peter

Edited October 1, 2011 by GreeneKing

[obbm]

[quote name='GreeneKing' timestamp='1317466410' post='1390949'] Is the 2 pole Speakon different in appearance to the 4 pole? If so it would help in identifying which end is which. Peter[/quote]

It is but I always label the amp end of the cable anyway.

[GreeneKing]

[quote name='obbm' timestamp='1317466654' post='1390955']

It is but I always label the amp end of the cable anyway.
[/quote]

Excellent Dave, you have an email.

Peter