Stray Posted April 23, 2008 Share Posted April 23, 2008 Hello Sorry if this is a dumb question, I couldent find anything explaining it on the forum. If I have 3 x 8 ohm cabs a side how many ohms is that per side? also how much power would I be getting per channel from a yamaha p7000 at that ohmage? Thanks, Gethin. Link to comment Share on other sites More sharing options...
MarkPAman Posted April 23, 2008 Share Posted April 23, 2008 2 & two thirds 1/8 + 1/8 + 1/8 = 1/Total impedance. (The 8s being the value for each speaker) You can extend this for as many speakers as you want, putting in 4 or 16 for different speakers. When all speakers are the same this simplifies to impedance/number of speakers. 8/3 in this case. By the looks of it that amp only goes that low in bridged mode, so you'll need two of them if you have six cabs. Sorry got that bit wrong! See later posts. Link to comment Share on other sites More sharing options...
Trunker Posted April 23, 2008 Share Posted April 23, 2008 2 & two thirds All depends on length of speaker wire, thickness of speaker wire etc. Link to comment Share on other sites More sharing options...
patrick_keys Posted April 23, 2008 Share Posted April 23, 2008 ... and whether you wire in series or parallel! Link to comment Share on other sites More sharing options...
MarkPAman Posted April 23, 2008 Share Posted April 23, 2008 ... and whether you wire in series or parallel!True. However, I have nerver ever seen series wiring between two (or more) different cabs except in small fixed installs. Also with 3 cabs, there is no useful way of doing it even if you wanted to. Link to comment Share on other sites More sharing options...
Stray Posted April 23, 2008 Author Share Posted April 23, 2008 So it would be running at 2.6ish ohms? it says on the p7000 data sheet that it can do 1600 + 1600 @ 2 ohm stereo, 1khz. is there a way of figuring out how much it would do at 2.6 ohms? I'm not sure of the thickness of my speaker wires. theyre not that thick tho,cables are about 10m - How much will this affect ohms + power? I think it'll be set up in parallel. its just goin out the back of 1 cab into the other. Thanks guys Link to comment Share on other sites More sharing options...
Rob_Beech Posted April 23, 2008 Share Posted April 23, 2008 But the OP didn't mention cable, just the impedance, and that is calculated how Mark says. We could say it depends on the enclosure type, size, and the frequency being played, we could bring temperature into it. Then again we could say 2 and 2 thirds, as that answers the question. Link to comment Share on other sites More sharing options...
MarkPAman Posted April 23, 2008 Share Posted April 23, 2008 it says on the p7000 data sheet that it can do 1600 + 1600 @ 2 ohm stereo, 1khz. Appologies so it does. Also says 1100 + 1100 at 4 ohms. My guess is about 1400 at 2.67 Link to comment Share on other sites More sharing options...
Stray Posted April 23, 2008 Author Share Posted April 23, 2008 ok Cheers guys!! Geth Link to comment Share on other sites More sharing options...
Simon Lewis Posted April 23, 2008 Share Posted April 23, 2008 Also says 1100 + 1100 at 4 ohms. My guess is about 1400 at 2.67 Actually, it does 1100 into 4 only at 1kHz and with THD+N=1% and on a stiff mains supply. Under more appropriate test conditions (20Hz-20kHz THD+N=0.1%) it should deliver about 950W / channel into 4Ohms and 650W / channel into 8. That's for the strangely labeled "European model". Link to comment Share on other sites More sharing options...
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