Capacitor of spare Battery to save Alternator

Big_T

Junior Member
Hello,

I have :

Phoenix Gold Octane R5.0:4 4x50watts rms running to the 4 factory components

PPI 4240 4x30watt running 2 of the 4 channels bridged to 120 watts rms driving a single12 inch sub. (2 channels unused)

My question is : Would it be prudent to use a secondary battery or capacitor to insure the longevity of the alternator? I've been reading that capacitors can help give a surge of power for those low bass notes but what about relieving the stress on the alternator?

My playing style is usually playing at normal average level with a couple loud sessions once in a while.

The car is a Jaguar XJ8. It has a fairly large battery but (as with all things jaguar) replacing the alternator will undoubtedly be an expensive affair.

Many thanks

 
dont listen to the people messing with ya, a capacitor adds more strain to the alternator. If you are experiencing voltage drops get a second battery. With that little power all your going to need is a very small battery. Stay away from capacitors.

 
Did anyone else bother to read that the OP is running maybe 350 watts RMS?

Both a Cap and a secondary battery are going to add strain on the alternator, believe it or not both require to be charged at some point in time.

OP, 350 watts is not going to harm your alternator, I wouldn't worry about it at all.

 
Did anyone else bother to read that the OP is running maybe 350 watts RMS?
Both a Cap and a secondary battery are going to add strain on the alternator, believe it or not both require to be charged at some point in time.

OP, 350 watts is not going to harm your alternator, I wouldn't worry about it at all.
yeah hes right, unless your trying to run 350w off a motorcycle battery, your stock batt and amp should work just fine, if you want some insurance, swap out your stock batt for the largest deka or yellow top or powermaster (insert car audio battery) you can fit and youll be fine

 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

About this thread

Big_T

Junior Member
Thread starter
Big_T
Joined
Location
Purgatory
Start date
Participants
Who Replied
Replies
9
Views
2,292
Last reply date
Last reply from
Louisiana_CRX
IMG_20260516_193114554_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0
IMG_20260516_192955471_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0

New threads

Top