wester399

Heres the deal ive got my amps all wired and such ...now tuning them i set the input gain adjustment which is a switch with 2 settings . 0.1v-1.0 or 1.0v-8.0v i know your supposed to match that with your head unit output. Mine is a pretty standard 2.5 volts. However when i set it to the 1-8v setting nothing happens but when i set it to 0.1v-1 it works ...confused?

RomanticMoments

The voltage isn't constant. The most accurate way of setting gains is with an oscilloscope, but they ain't cheap. I'll see if I can find Dukk's method for gain setting that he posted up here, it's probably one of if not the best low-tech way of setting gains

JohnVroom

the HU at 0 volume makes 0 volts, max out its volume at 2.5 volts with the gain at the 1 to 8 v setting you will need to advance the gain (turn the ****) somewhere between 1/2 way and max for the voltage to allow the amp to reach rated power

RomanticMoments

I can't find it, but I remember most of what he said. You need to find a 1000 Hz tone. Play it through your HU and turn up the volume until the sound goes "flat". You'll know it when it does. Then turn it down until it goes back to normal. Then do the same with the amp gain. By doing it this way, your amp will clip at roughly the same time your deck does.

madwarrior

iTrader: (3)

i find setting the gain easy. turn it to ur desired position. if its too loud and crackling and sounds hallow then turn it down. simple as that

BigRedGuy

iTrader: (11)

Maybe this will help.....

This process is a lot easier to do with 2 people....you will also need a source for the cleanest music you know well....ie. original CD....anything ripped and saved as MP3 or WMA may suffer some loss of quality during the conversion process.

In as few words as possible.....

1. Check deck and amps, ensure all boost, EQ and gains are set to minimum.

2. Plug in RCA for front R speaker only. For 5.25" HP starts at 120hz, either in deck(preferable) or on amp. Using music you know well, raise volume on deck until it starts to clip, back it off till distortion is gone. Raise gain on amp very slowly until distortion is heard again, back it off. Lower volume on deck, lower HP setting 1 step (or approx. 100hz if variable). Repeat this process until you find the setting that gets you the most volume without distortion.

3. Repeat process for front L.....if you are using rear speakers I usually leave them out of the process until later.

At this point you have as much sound from the front end as the equipment can handle.

4. Plug in sub RCAs.....set Xover at approx. same value as HP minus 20 hz. Unplug front RCAs, raise volume at deck until distortion is heard, back it off until distortion stops. Try raising gain to see if there is any headroom left in amp, after fiddling, sub should be getting as much clean power as possible.

5. Hook fronts back up, listen to system at moderate volume....listen for even volume across all freq. If you have a test disc it will help with this part. Try adjusting sub gain and Xover to help the mix if possible, having set the fronts to their maximum output it is generally better to try and match the sub output to that level rather than the other way around.

6. Once you have found the best sounding (to your ears) settings, then hook up your rears. If you have a 4 channel running the mids and highs, unplug the fronts and the subs and repeat the setting process you did for the fronts.

7 Plug them all back in.....at this point you should only have to adjust the fader or the gain for the rears to get them to blend with the other speakers until you are happy with the sound.....

Setting the subsonic ( or infrasonic if ya wanna pic nits..... ) just below Fb is a good way to keep the woofer(s) happy.....it's all about getting the most you can out of what you have.....

HTH