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Old    Slingshot            07-06-2009, 3:39 PM Reply   
I heard that if you use a stereo capacitor in a boat, they won't last very long because the boat is grounded only to the battery. Is this true?
Old     (topside_marine)      Join Date: Sep 2005       07-06-2009, 4:14 PM Reply   
I don't believe that would be supported by current electrical theory since the definition of ground means that you ultimately have to come back to the battery to complete the circuit.
Old     (murphy_smith)      Join Date: Dec 2005       07-06-2009, 4:19 PM Reply   
Not sure, but that does not sound right.

Why do you want to add a capacitor?
Old     (wakeboardin2k4)      Join Date: Sep 2006       07-06-2009, 4:59 PM Reply   
Well the battery is grounded to the block. Which is of equal ground strength as anything in your car.
Old     (jonyb)      Join Date: Nov 2008       07-06-2009, 7:15 PM Reply   
A capacitor is pretty worthless in a boat IMO.
Old     (mikeski)      Join Date: Aug 2003       07-06-2009, 10:41 PM Reply   
It really depends on the wiring and the batteries. If your sub amp is trying to pull more than these systems are capable of delivering instantaneously then a cap will help. If not, then it is a waste of money. Many car wiring systems suffer from such deficiencies that's why they are popular in cars.
Old     (wakebrdr38)      Join Date: Sep 2006       07-07-2009, 7:34 AM Reply   
mine went out before I ever got to use the damn thing. Condensation formed one morning on it, and that was that.
Old     (david_e_m)      Join Date: Jul 2008       07-07-2009, 10:16 AM Reply   

Since a capacitor only provides instantaneous reserves to meet peak transients, I've always considered it to be of some esoteric value only in systems where the voltage is good. In a boat where you're often running below an optimum voltage, especially when at rest, I don't see a real benefit.

Earmark Marine


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