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Thread: Connecting 3 8-ohm speakers to amp |
    
Unregistered guest |
| Posted on Wednesday, August 17, 2005 - 03:03 pm: |
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I am setting up a football field sound system. We have a QSC 1850 HD amp powering 2 Electrovoice Sx500+ speakers which will be connected in parralel using Neutrik speakon connectors.
The problem is with the 3 smaller EV speakers for the home stands. We will be using 3 Electrovoice Sx80PI speakers rated at 8-ohms (nom). The QSC 850 amp has a rating of 830W at 4 ohms and 600W at 8 ohms. The amp will be running in parralel bridged/mono mode. What way would be the best to connect the 3 smaller speakers to the amp?
Thanks! |
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Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 5103
Registered: May-04
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| Posted on Wednesday, August 17, 2005 - 05:35 pm: |
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If the amp is capable of 25 or 70 volt output, that would be the best choice for a simple hookup. |
Unregistered guest |
| Posted on Thursday, August 18, 2005 - 12:38 am: |
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Would the best way be a combination of Series/Parallel wiring? The QSC specs for the RMX 850 amp are http://www.qscaudio.com. Click on Products, and the RMX series. Any help is appreciated! |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 5117
Registered: May-04
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| Posted on Thursday, August 18, 2005 - 02:22 am: |
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What?! You didn't think the answer I gave you was helpful? If the amplifier is capable of driving a 25 or 70 volt transformer coupled distribution system, that is your best solution. The amplifier sees a constant load and the power is distributed evenly across all speakers regardless of the actual impedance of the overall load.
If you don't like that answer, I would suggest you find out what the lowest impedance of the speakers falls to and call QSC. I doubt the amplifier will drive all three 8 Ohm speakers in parallel hook up. A series or parallel/series combination is probably the next best solution.
The specs for the amplifier don't mean diddly if you don't know the lowest (and highest) impedance the speaker goes down to.
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