# this is series-parallel, right?

Discussion in 'Pickups & Electronics [BG]' started by hachi kid, Jan 23, 2012.

1. ### hachi kid

Jun 2, 2008
Pelham, AL

a friend sent me this photo. he has an amp wired up this way. I'm certain it's series-parallel, but I just want to double check myself to make sure he doesn't blow his head. it's a cab wired like this loaded with 8ohm speakers. this cab is rated for 8ohms, correct?

2. ### hachi kid

Jun 2, 2008
Pelham, AL
77 views and no one can confirm?...

3. ### SGD LutherieBannedCommercial User

Aug 21, 2008
Bloomfield, NJ
Owner, SGD Music Products
You have two pairs of speaker in series and then the two pairs in parallel.

What is each speaker rated?

If each speaker is 8 ohms, then the two in series are 16 ohms, so the two 16 ohm pairs in parallel are 8 ohms.

4. ### line6man

Two speakers in series, parallel to a second set of two speakers in series.

Total impedance is:

Z[SUB]Total[/SUB]=1/([1/[Z[SUB]1[/SUB]+Z[SUB]2[/SUB]]]+[1/[Z[SUB]3[/SUB]+Z[SUB]4[/SUB]]])

5. ### ehque

Jan 8, 2006
Singapore
8 Ohms, correct.

8+8=16 (series)
8+8=16 (series)
1/16+1/16=1/8 (parallel)