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Old 20th December 2009, 06:27 PM   #1
pmt is offline pmt  United States
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Default Sumo 9 Power Amp - Input Impedance?

I have an old Sumo 9 power amp, purchased new in the early 1980s. Does anyone know the input impedance on this amp?

Thanks in advance.
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Old 20th December 2009, 06:43 PM   #2
llwhtt is offline llwhtt  United States
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1 Meg.

Craig
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Old 2nd January 2010, 05:58 PM   #3
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I am looking for a drawning for this amp Sumo Nine can you help?
Ed Doherty
edoherty@cableone.net
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Old 2nd January 2010, 06:53 PM   #4
llwhtt is offline llwhtt  United States
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There are three different versions or I should say I have schematics for three versions. The first one is just SUMO NINE, the second two are NINE+. Determining which of the +s you will need to see what type of output transistors it uses. The first + uses 2SC1831s and the second uses 2SD555s. I have the NINE schematic loaded up and ready to go, the NINE+s I'll have to do some digging. I have tons of schematics in no particular order, unfortunately.

Craig
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Old 2nd January 2010, 07:10 PM   #5
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Default Sumo Nine

Thanks for the info could you send this drawing of the Sumo Nine amp that you have ready to send.
edoherty@cableone.net
Thanks a lot
Ed Doherty
let me know what you think of this amp or any of the others that you have. Sound Quality
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