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6 speakers 1 powered mixer
For an up and coming gig my band are hoping to connect six speakers
through one powered mixer. Two of these will act as monitors and the other four will face the crowd. The problem is that we have no idea how to set up such a system and whether it would even be safe. I know the specifcation of one set of speakers and the powered mixer... MIXER - 80watts/channel in to 4 ohms (18V RMS), 50watts/channel into 8 ohms (20V RMS), 4 0r 8 ohm load (4 ohms min. load), two speaker output channels. EACH SPEAKER OF A PAIR - nominal impedance: 8 ohms power capacity: 200watts Spec. of other speakers - accept as the same as above but would also appreciate advice for the system setup if these other four speakers varied in any way I would greatly appreciate any advice on setting up such a system as frankly we have no idea. Cheers, Mike. |
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6 speakers 1 powered mixer
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#3
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6 speakers 1 powered mixer
Michael Henson wrote
For an up and coming gig my band are hoping to connect six speakers through one powered mixer. Two of these will act as monitors and the other four will face the crowd. The monitor speakers will typically require at least a separately adjustable volume, and possibly a different mix, from the audience speakers. I know the specifcation of one set of speakers and the powered mixer... MIXER - 80watts/channel in to 4 ohms (18V RMS), 50watts/channel into 8 ohms (20V RMS), 4 0r 8 ohm load (4 ohms min. load), two speaker output channels. EACH SPEAKER OF A PAIR - nominal impedance: 8 ohms power capacity: 200watts If you keep it to 4 speakers in total, it's straightforward. Two 8ohm speakers in parallel is 4ohms, so you can put two speakers in parallel on each channel. Each speaker will have the same volume (assuming the speakers are of the same type). If you have 4ohm speakers and parallel them the result is 2ohm. Many amps will be unhappy with that load especially if driven hard. For 6 speakers it's a bit more complicated. Possibly best doing 4 speakers on one channel, and 2 speakers on the second channel. The 4 speakers on one channel is wired in series/parallel as: + ---------|----------| | | + + SPKR SPKR | | | | + + SPKR SPRK | | | | - ---------|----------| You need to get the speakers in phase (ie the + and - terminals the right way round). If you want to calculate the impedances, speakers in series are added and for speakers in parallel the reciprocals are added. So for the series/parallel mix shown, we have two sets of speakers in series, wired parallel: Series: 8ohm + 8phm = 16ohm. Parallel: 1/16 + 1/16 = 2/16 = 1/8 = (undo the reciprocal) 8/1 = 8ohm. Owain |
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