Just recently had my two 12" subs installed. I have a 500 watt mono amp pushing these and I have another 600 watt amp pushing my door speakers. Up until I put in the subs, my voltage meter would never bounce, now it does. Usually when bass hits hard the meter will go down to about 12 and up to 16 volts and lights will flicker a bit. Now my question is, should I upgrade my alternator? I currently have 130 Amp in my 00 Tahoe. I don't want to put too big of a alternator in and fry my system. I'm also looking to upgrade my lights to LED so I know I'll need something a bit more powerful for the future. Any recommendations are greatly appreciated.

 

Do the "Big 3" first and foremost.

 

I had a stock 120amp alternator upgraded to 270amp Mechman I have no more problems now.

 

I have a 220amp fitzall HO alt if u are interested in buying

 

If youve got money to throw around, then get one of the high output or severe duty ones the folks are suggesting here, but if your like me then just go to autozone and get one w/lifetime warranty. I bought one a year ago for around $149.

Before everyone jumps on me and says that they are junk, mines been on for about 20K miles now.

 

Eagleauto on ebay makes a decent high output alternator for under $300