Ohm Question on Diezel cab

[Electric]

Hi,

Here is a picture of the jack plate of my Diezel 4x12:



I use a 6505+ with options for 16, 8, or 4 ohm output. Which output should setting should I be using? Right now I have the output on the back of my 6505+ set to 16 ohm, and running into jack on my cab labeled Side A/Mono. Should I change my amp setting to 8 ohm output? Am I doing any potential harm to my gear the way I have it set currently?

[roodyrocker]

I'm guessing 16 ohm in Side A/Mono is correct for your setup as described. If you used the cab in stereo then it would be 8 ohm into each, side A and side B. I' don't own a Diezel but thats how I'm reading that from your pic. OTOH, I see side B is labled 16 ohm as well :scratch: Anyway, if you run your amp setting on 8 ohm into a cab that is either 16 or 8 ohm, you shouln't damage the head. The amp is still seeing a load on it so although there may be a slight mismatch it shouldn't hurt it. In fact some people intentionally run their amps that way because they like the sound better one way or another.

[javert]

My guess is that the mono mode is the two 16 Ohm sides in parallel, so you should choose 8 Ohm.

[veemagic]

Agree. I would read that as stereo is 16 Ohm per side and 8 Ohm is the mono side. So choose 8 Ohm.

[charvelguy]

Interesting, that's a but confusing initially but everyone is right on. I ran into similar problem on a Bogner as it says on the back of the amp its 8ohms out (either 4 or 8, there's no 16 ) but also fine to run it into a 16ohm cab which is ok for a tube amp.
Solid State amp heads would be a different matter in reverse.
This is a pic from a 2x12 cab. The question was initially asked on another forum 2 years ago. Likely not the same guy but it is the same pic.

http://www.thegearpage.net/board/showthread.php?t=761387

[Electric]

Cool. Thanks for the replies.

[dannyr]

I agree with all the replies above, but if you want to make sure go over to Rig Talk and you can ask Peter Diezel directly.