Another speaker ohm question

Fran · Post by **Fran** » Sun Jul 18, 2010 11:47 am

Our bassist went and bought a cab without checking the ohms rating of his Amp, turns out the Amp is 8 ohms and the cab is 4 ohms (4 x 4 ohm speakers, series/parallel i assume).
I can't wire this for 8 ohms can i? Can only find diagrams for 16 ohms in series, which from what i can gather will be safer than leaving it at 4 ohms.

Post by **Doog** » Sun Jul 18, 2010 12:05 pm

To get 4 ohm total, you'll need to to wire up 2 pairs of speakers in series, then wire those pairs to the input jack in parallel.

Fran · Post by **Fran** » Sun Jul 18, 2010 1:47 pm

It's in 4 ohms now, he wants it 8 ohms to match the amp.

robroe · Post by **robroe** » Sun Jul 18, 2010 1:51 pm

Doog wrote:To get 4 ohm total, you'll need to to wire up 2 pairs of speakers in series, then wire those pairs to the input jack in parallel.

brain hurt

laterallateral · Post by **laterallateral** » Sun Jul 18, 2010 1:59 pm

Hmmm I think you're screwed unless you want to wire up a 4 ohm dummy load (in series) into your speaker array, which you probably don't.

Post by **Doog** » Sun Jul 18, 2010 2:12 pm

Fran wrote:It's in 4 ohms now, he wants it 8 ohms to match the amp.

Fuck, I'm a skimidiot, sorry!

Yeah, it looks like 16 or nothing, without changing speakers or using a dummy load, like Lat said.

brandon. · Post by **brandon.** » Sun Jul 18, 2010 2:23 pm

I've heard about these, interesting idea, not sure if it works great...
might be expensive too.

laterallateral · Post by **laterallateral** » Sun Jul 18, 2010 2:41 pm

Oh man...

"Do not switch under power"

WHEEEEEEEEEEEEEEEEEEEE!!!! *BLAM!*

Fran · Post by **Fran** » Sun Jul 18, 2010 3:48 pm

Thanks for the replies. 16 ohms it is then

Julian · Post by **Julian** » Mon Jul 19, 2010 6:11 am

Well to have a 4 ohm quad, that either means that you've got four 16 ohm speakers in parallel, or two pairs of series 4 ohm speakers in parallel.

Either case, the best you can do is rewire it for 16.

Rayjaysonic · Post by **Rayjaysonic** » Tue Jul 20, 2010 2:37 pm

brandon. wrote:I've heard about these, interesting idea, not sure if it works great...
might be expensive too.

I had a friend who used one of those. As far as I know it did the job. Not sure what he payed for it though.