Al Heeley Posted November 6, 2012 Share Posted November 6, 2012 Our guitarist has started putting one of his 2 x 12 extension cabs behind the drummer so he can hear a bit more of the guitar in a gig, only we'd like to be able to just turn it down a touch to balance with the sound from my bass cab. I'm looking for a simple passive circuit the extension cab could go through to knock a bit of volume off without stressing the guitar amp, a rather meaty Mesa dual recto head. This way the guitarist can keep his main cab blasting out forwards and the drummer can set the guitar volume in his extension cab like a personal monitor. That's the plan. Anyone know of a little circuit that could do the job? Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted November 7, 2012 Share Posted November 7, 2012 The logical thing to do would be to have a variable resistor of the correct value in line, so you can turn down the signal going to the speaker - however this will not only need to withstand an awful lot of current, it will increase the resistance of the second cab upon the amp - which will f**k things up for the amp, especially for a valve head! I think the simplest option would be to get a power amp and take a line out from the guitar amp. Or just get a cheap powered monitor running off a line out from the amp. You don't want to be messing around with the impedance (resistance) where an amp is concerned IMO. The volume needs to be adjusted at line level. Quote Link to comment Share on other sites More sharing options...
LawrenceH Posted November 7, 2012 Share Posted November 7, 2012 Put a blanket over the cab! Quote Link to comment Share on other sites More sharing options...
mart Posted November 7, 2012 Share Posted November 7, 2012 [quote name='LawrenceH' timestamp='1352310671' post='1861480'] Put a blanket over the cab! [/quote] That is exactly what I was thinking. Quote Link to comment Share on other sites More sharing options...
BigRedX Posted November 7, 2012 Share Posted November 7, 2012 The best and most amp-friendly solution will be to run the second speaker through a decent variable output speaker attenuator such as a [url=http://www.thdelectronics.com/product_page_hotplate.html]THD Hotplate[/url] or a [url=http://www.tedweber.com/atten.htm]Weber MASS[/url]. Quote Link to comment Share on other sites More sharing options...
rmorris Posted November 7, 2012 Share Posted November 7, 2012 [quote name='brensabre79' timestamp='1352308253' post='1861440'] The logical thing to do would be to have a variable resistor of the correct value in line, so you can turn down the signal going to the speaker - however this will not only need to withstand an awful lot of current, it will increase the resistance of the second cab upon the amp - which will f**k things up for the amp, especially for a valve head! I think the simplest option would be to get a power amp and take a line out from the guitar amp. Or just get a cheap powered monitor running off a line out from the amp. You don't want to be messing around with the impedance (resistance) where an amp is concerned IMO. The volume needs to be adjusted at line level. [/quote] +1 Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted November 9, 2012 Author Share Posted November 9, 2012 i think the cheap powered monitor is the way to go, we can feed some vocals through it too. Dont want to be responsible for blowing up his Mesa head. Quote Link to comment Share on other sites More sharing options...
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