View Full Version : polk audio mm651
07-09-2009, 08:52 PM
:rolleyes:just hooked up 2 sets of the mm651's in my boat the deck is a kenwood and when I get the volume over 20 the deck shuts off until I turn it down. Is this because I don't have an amp yet and the speakers are wanting to much power? the speakers I pulled out of the boat did'nt have the same problem.
07-29-2009, 04:06 PM
I was thinking about putting these same speakers in my boat. I also have a kenwood deck and when I crank it up with the stock speakers, it cuts out too. Any light to be shed on this situation would be great. Thanks
07-29-2009, 04:24 PM
The amp in your hu is clipping and then shutting down. Get an amp.
Guy's youre driving a 100watt rms speaker off a 15watts rms power source, and then youre trying to crank it....:)
The MM series are solid. To hear the true potential you have to amp them
07-29-2009, 04:38 PM
Quick reply, awesome thanks.
07-30-2009, 08:58 PM
Not sure if thats the problem. Yeah youre clipping the head unit and yeah a head unit is the WORST power source but it shouldnt cut the head unit off. Sounds to me youve got either a bad ground and/or bad power wire termination and its not drawing enough power. Even at full clip, the head unit should still play.
07-30-2009, 10:06 PM
I wish I could tell you where the ground was but it is on a boat. All I did was connect the black wires from the stock HU to the new one.
08-13-2013, 08:26 PM
old thread but the issue is you're using 2.7 ohm speakers on a head unit that is only stable down to 4 ohms. get an amp that is stable at 2 ohms
10-05-2013, 06:53 PM
I had the same issue,all new components! The Kenwood head would just shut down! The problem ended up being low voltage to my
entire console. Not sure how,or why. I ran a dedicated powerline to the Head unit,and solved it instantly!
Hope this helps.
10-06-2013, 12:22 AM
I just put a pair in my car and a pair of MM6501's and they are working great! 100 watts per channel coming from a JL Audio XD400/4 amp
you can see my install pics here: http://www.salsleaf.com/leaf_stereo/index.htm
10-06-2013, 12:57 AM
Just FYI from someone who knows more about car audio than home audio...Marine grade speakers, regardless of manufacturer will require a ton of power to drive correctly, they are built to a heavier duty standard than their non marine counterparts. Thus, requiring more power to get a decent level of sound out of them. Most headunits are good for right around 18 watts RMS output...
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