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#1
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How to Adjust Balance on JL 300/4 Amp
How do I adjust the balance on a JL Audio 300/4 amp? I know I am supposed
to play with the input sensitivity but how do I know how much and which way to put it? Also I get a bit of hissing at higher volumes. Should I increase the volume at the HU and lower the gain at the amp? Thanks. Jason |
#2
Posted to rec.audio.car
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How to Adjust Balance on JL 300/4 Amp
Jason Danziger wrote:
How do I adjust the balance on a JL Audio 300/4 amp? I know I am supposed to play with the input sensitivity but how do I know how much and which way to put it? If by "balance" you mean the relative levels between front and rear, what I'd probably do is set the front input level first to what's "appropriate", then adjust the rear input to the "proper" level to match. Of course, what's "proper" is whatever sounds best to YOUR ears. Also I get a bit of hissing at higher volumes. Should I increase the volume at the HU and lower the gain at the amp? The more you turn up the gain on the amp, the more you boost the signal AND whatever noise is produced by the HU and picked up in the cables. The method I usually use is to turn the amp gain down low, then turn the deck up until the sound starts to distort: this is the level where you're either overdriving the deck's output, or clipping the amp's input. Back it off a hair from there, and you'll have the hottest signal your deck can provide cleanly. Leaving the deck volume where it is, then start brining up the input gain on the amp's front channel, again, until you start getting distortion/clipping, indicating either the amp's maximum clean output, or the speakers' max handling. Finally, bring up the rear input level to about the same point as the front, and sit in the car as you would when driving normally (doors, trunk, windows closed). If necessary, adjust the rear level to balance out with the front. Theoretically, you want the sound to appear to be coming from directly in front of you, so the rear speakers would normally be a bit lower than the fronts, but once again, unless you're building a competition system, think more about what sounds good TO YOU. Hope that helps.... |
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