Capacitor question

[diddlebrittle]

I have Rockville db15 and a 240 amp alternator for autotech engineering. It charges around 15V. The amp goes into safe mode temporarily after a hard bass to no bass .I think its because it hits over 16 volts just for a second from the Alternator. Would a capacitor fix this issue? If so what would you recommended thanks!

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[AnthonyO 10+ year member]

Capacitor will not fix this issue. Sounds like you need a voltage regulator or your alternator is bad. According to their website that alternator should be at factory specifications. Which is not 16v.

 

[highfigh]

I have Rockville db15 and a 240 amp alternator for autotech engineering. It charges around 15V. The amp goes into safe mode temporarily after a hard bass to no bass .I think its because it hits over 16 volts just for a second from the Alternator. Would a capacitor fix this issue? If so what would you recommended thanks!

Who spec'd the alternator? Did it come with a pulley? If that's smaller than the OEM pulley, swap them. If you can't swap them, find a pulley that fits and will reduce the RPM.

Call Autotech and ask about this- it may be defective, but the pulley change will work and they should be able to advise you on that.

 

[diddlebrittle]

Thank you everybody for the replies. I sent them a email a little while ago and they said "you would have to go with a external regulator or a voltage control module unfortunately we don't have a regulator that is set to the lower voltage" and they have 14.8v to 15.8v regulators. They recommended me this one ] and was wondering if you have any experience with it and if it will work. Thanks!

 

[AnthonyO 10+ year member]

Amazon.com

 

[AnthonyO 10+ year member]

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[mahc 10+ year member]

I have Rockville db15 and a 240 amp alternator for autotech engineering. It charges around 15V. The amp goes into safe mode temporarily after a hard bass to no bass .I think its because it hits over 16 volts just for a second from the Alternator. Would a capacitor fix this issue? If so what would you recommended thanks!

Big3 upgraded?

 

[Old_Slapper]

Who spec'd the alternator? Did it come with a pulley? If that's smaller than the OEM pulley, swap them. If you can't swap them, find a pulley that fits and will reduce the RPM.

Call Autotech and ask about this- it may be defective, but the pulley change will work and they should be able to advise you on that.

The pully wouldn't make a difference in voltage output. Otherwise, higher RPMs would cause the voltage to keep rising. A voltage regulator is used to keep voltage from going beyond the desired voltage.

 

[mahc 10+ year member]

Maybe replace the $20 internal regulator first?

 

[diddlebrittle]

Yes I would love to change the internal regulator. Do you know of anywhere that sells a 2 wire one?

 

[mahc 10+ year member]

Yes I would love to change the internal regulator. Do you know of anywhere that sells a 2 wire one?

I don't know what car you have. I'd contact Autotech before buying anything tho.

 

[highfigh]

The pully wouldn't make a difference in voltage output. Otherwise, higher RPMs would cause the voltage to keep rising. A voltage regulator is used to keep voltage from going beyond the desired voltage.

The practice of 'under-pullying' is older than most members of this forum. The voltage regulator is supposed to make sure the voltage is correct, but we all know that not everyone will buy a regulator that's capable and reliable. For those who swapped an alternator and left it at that, using a smaller pulley is the easiest and least expensive way, if you don't count the cost of buying or driving around to borrow a pulley puller.

 

[Mitchell Fosgate III]

No. Already at 16 volts. More storage energy from the capacitor will only create other problems. Irregular peak amplitude by the AC currents. Called a DC offset. It creates no volume. Then shut down.