Sound City 50 plus - Ohm advice

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Sound City 50 plus - Ohm advice

Postby Chop5 on Sun Jan 13, 2013 3:14 pm

Hi there
im currently running my 50 plus through a 2 x 12 cabinet, the speakers in there are 4ohm and wired up in series to 8, if I was to add another 2 x 12 cab wired up the same do I keep the amps ohm selector at 8 or do I need to change that to 16?
Also, can you mix cabs wired up in series and cabs wired up in parallel?
Cheers
Anth
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Re: Sound City 50 plus - Ohm advice

Postby Papa Dog on Mon Jan 14, 2013 4:35 pm

Chop5 wrote:Hi there
im currently running my 50 plus through a 2 x 12 cabinet, the speakers in there are 4ohm and wired up in series to 8, if I was to add another 2 x 12 cab wired up the same do I keep the amps ohm selector at 8 or do I need to change that to 16?
Also, can you mix cabs wired up in series and cabs wired up in parallel?
Cheers
Anth


Neither.
2 8 ohm cabs run in parallel (e.g. one cab into each speaker out) will give you 4 ohms, which is where the selector should be set.

How the cabs are wired internally is of little consequence, so long as they "present" either 4, 8, or 16 ohms at the jack.
The thing to remember is that no matter how the cabs are wired internally, both cabs should present the same impedence at the jack, then divide by 2, and that is the system impedence. In no case should the system impedence be below 4 ohms for a Sound City 50 plus.
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Re: Sound City 50 plus - Ohm advice

Postby Chop5 on Mon Jan 14, 2013 9:09 pm

Thanks for that Papa Dog - i was starting to get myself a bit confused!
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Re: Sound City 50 plus - Ohm advice

Postby MajorWatt on Tue Jan 15, 2013 6:58 am

Like Papa says, divide by 2 at the amp. I have never met an amp that doesn't have the speaker jacks in parallel... Except may some combo possibly..

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Re: Sound City 50 plus - Ohm advice

Postby saiamps on Sat Mar 30, 2013 10:30 am

Chop5 wrote:Hi there
im currently running my 50 plus through a 2 x 12 cabinet, the speakers in there are 4ohm and wired up in series to 8, if I was to add another 2 x 12 cab wired up the same do I keep the amps ohm selector at 8 or do I need to change that to 16?
Also, can you mix cabs wired up in series and cabs wired up in parallel?
Cheers
Anth

set to 4 ohms mick
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