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Dirty-South Blues Harp forum: wail on! > Speaker in series and parallel
Speaker in series and parallel
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shbamac
342 posts
Jun 22, 2013
3:53 PM
So it took a little while to figure this out but I got it working. So now my cab is set it to run various combinations and impedances. I can run two amps at the same time. One amp to 2x10" at 4 or 16 ohms, another amp into 2x6x9" and 12" at 4 or 16 ohms. Or one amp into all speakers at 2, 3.2, 8, 16 or 32 ohms. Not that I would use some of the higher ohms (16 - 32). Switches and jacks are mounted on a temp board for now.



DukeBerryman
65 posts
Jun 23, 2013
4:58 PM
Very cool - I just did something similar, though much simpler, my first time wiring something in series. Hope your amp likes it!
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Duke Berryman - Chicago blues, harmonica, guitar
Jim Rumbaugh
871 posts
Jun 23, 2013
7:48 PM
Since you have different makes of speakers, do you check their phase?

Back in the day, we would take a 1.5 volt battery and apply a test voltage to make sure all the speakers were going out at the same time. Or maybe everything is standardized today and it's no longer needed??
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theharmonicaclub.com (of Huntington, WV)
Greg Heumann
2222 posts
Jun 23, 2013
8:51 PM
Jim - you are right to bring it up. You should never assume that "+" on one speaker means the same as "+" on another. It SHOULD - i.e., a positive signal on the + side should move the cone out - but it isn't a given. I've even seen 2 Weber speakers where one was the opposite of the other.
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shbamac
343 posts
Jun 24, 2013
6:30 AM
"Since you have different makes of speakers, do you check their phase?"

Why would I do a silly thing like that... Of course I would! I wouldn't take the time to wire all this up and not check the phase. I all ways check my speakers.

All done



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