BigDaddy13440
Full Access Member
What size alternator do you have, I want to upgrade subs but don't know how powerful i can go
Your Planet Audio amp and his HiFonics amp are pretty much the same power, and probably draw about the same amperage from the alternator. FWIW, I have a stock alternator, and the "1000w rms" Lightning Audio amp I have draws enough power to make my lights dim just a little bit, but only on the very heaviest of bass (Techmaster PEB, Bass 305 and the like). I only have one battery, and it's just fine. Once you start getting up over 2000 watts rms, then you need to go to very-high output alternators, and multiple/dedicated batteries. If you're under 2000, then a higher-output stock-case alternator with a single battery should suffice - check and see if the PPV Tahoes had a 145 or 160 amp version.
Just re-read your post..... no need to change alternators or amps if you are just looking to upgrade your subs. They don't draw any power, it's the amp that does. You could get some 24" Sundown Audio subs, or a 32" Deaf Bonce sub (http://alphard.audio/us/subwoofers/deafbonce-db-832neo) from Russia, and run your same PA amp to them - your power consumption will be the same.
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