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Old 22nd April 2003, 10:36 AM   #1
cld1354 is offline cld1354  Italy
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Join Date: Apr 2003
Location: Ancona
Default Driving double coil woofer

Hello,
I'm trying to realize a sub as a part of multiamp loudspeaker that I will cut at about 150 Hz.
I have for this a pair of Monacor SPH-380 that have 4+4 ohm 250watts double coil.
There are problems to drive each coil with an amp of, I say, 200 w
rather than with an amp of 400 w driving the parallel of coils?

Thanks
Marco
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Old 23rd April 2003, 11:28 AM   #2
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Join Date: Mar 2003
Location: Lisbon, Portugal
Red face Series

Don't connect the two coils in parallel, or you'll have a 2 ohm speaker.
Make a series connection, and you'll get an 8 ohm woofer, much easier to drive.
Then you can use the 400w amp.
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