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Kustom "200" [message #9719]

Wed, 01 October 2008 13:09

gmorley
Messages: 2
Registered: October 2008

Junior Member

This may have been asked before but I am new to this site and rather than scroll thru all messages, I will ask. I have a Kustom "200" head with the 3/12 cabinet (have had it since about 1972/3) and there is one RCA jack on the back of the head that I have never known the purpose of. I got the amp used back then and never needed an owner manual and now cannot obtain one. The purpose of this jack has always puzzled me. Can anyone out there fill me in on the purpose of the above mentioned jack? thanks in advance.

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Re: Kustom "200" [message #9720 is a reply to message #9719]

Wed, 01 October 2008 21:07

rodak
Messages: 514
Registered: October 2001
Location: Georgia

Senior Member

I believe it's a preamp-out jack, meant to plug into a secondary power amp. They used to call it a "slave out". I have no idea why it's an RCA and not a 1/4" - maybe they thought people would try to plug it into speakers....or a footswitch!

www.combo-organ.com

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Re: Kustom "200" [message #9721 is a reply to message #9719]

Thu, 02 October 2008 07:06

stevem
Messages: 4746
Registered: June 2004
Location: NY

Senior Member

Its really a tape record out put jack thats why its a RCA.
It can be used to feed a mixer or a power amp but some power amps these days need a input drive voltage of 1.4 volts ( or just about +4 DB) to get the full rated wattage out of them, and that RCA jack will not provide that much volatge.
A simple line output box can be made with two 1/4" jacks, 1 resistor, and one pot. this will go in line with the amps speaker output jack and give you the needed voltage to drive some of these newer power amps.The higher drive voltage needed by these new power amps provides a much improved signal to noise ratio.

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Re: Kustom "200" [message #9722 is a reply to message #9721]

Thu, 02 October 2008 11:45

gmorley
Messages: 2
Registered: October 2008

Junior Member

Thanks guys for your responses. I always figured it was for something like that but simply need to make sure.

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