[Mechman 270a Alternator for my Lexus IS-F - Video of the Guts]

If you have amplifiers with a regulated power supply, then the slightly lower voltage doesn't affect your system at all (if like you said you have the amperage behind).

Best regards from Munich
Bari

[My new Mechman Alt installed!]

Hello,

noise is mostly produced by a bad ground or high frequent noises from the alternator.

Have you a additional ground on your alternator? Your bracket doesnt look like in best condition. Have you done the big 3? Can you test a other ground point for your amplifiers? Or a direct connection to batterys negative?

Best regards and good luck

[Mechman 320a on a 5.7 chevy sports car]

Thanks for the video man! The turn-on rpm / idle output is a very important thing. You are right that bigger are not automaticly better.

I have also "only" a 180A/200A HO Singer (stock 90A) with stock pulley. Since there is no speed limit here, its good to can drive with >155mph and dont need to worry about the alternator.

Optima is good choice, have it too.

Best regards from Munich

Bari