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Volume issues with clarion M309 installed on a boat

Just installed a Clarion M309 head unit in a boat connected to 4 older clarion 6.5" speakers. My first problem is max volume on the unit is 33 but the unit needs to be at 14 just to hear sound. The second problem is if I get above 25 on the volume the speakers sound like they fade in and out or cut in and out(don't know the terminology) and the led "pulses" with the bass. I do not have an amp hooked up to the speakers. The only info I can get on the speakers is that they are 100W max power rated and the head unit puts out 50W x 4 RMS. I hope the only issue is that I need an amp to push the speakers but I want to be sure before investing. I am a newbee and any help would be greatly appreciated.

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Hello jcox7704,

Your head unit is 50 watts X 4 channel maximum power and 21 watts RMS so it's possible that all you need is more power to the speakers. But even 21 watts RMS should be enough for normal speakers. Before investing in an amp, I'd check the speakers and their wiring. Measure the impedance (resistance) at the head unit side to see if they match up.

Hope this helps.

Posted on Jul 02, 2009

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