Gains are meant to compensate.
Say you have 2 decks, both with RCA preouts. One has 2.2v RMS ones, and the other has 8v RMS ones.
If you have 8v going into an amp, you don't have to boost it'* level. But if you run the same amp, but input 2.2v you're amp will still think it'* using 8v. Therefore you use a Gain, which is like a "booster" per se. It makes the 2.2v act like 8v etc.
It is NOT a volume control. The factory gain control is just a bass boost really though. The woofer section of the 6x9s are powered seperately from the tweeters, and the gain adjusts how loud they are to each other.
'06 Vee Dub GTI 2 door Tornado Red
- 2.0 Turbocharged, Intercooled, Direct Injected, 6 Speed DSG, Underbody Aero, 17" Classix
- Moonroof, Bi-Xenon headlamps, Interlagos Plaid Sport Seats, 6 Disc In-dash, iPod integration, GTI Monster Mats (winter)
'93 Bonneville SE Purple Pearl H4U package - picked up June 23, 2003, Traded-in June 28, 2007...