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Old 08-01-2014, 01:51 PM   #1
UnknownAlly
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Default Setting level on amplifier amp Jenson XA2250

The manual says to turn down amp "level" knob all the way down. Then turn up the volume until I hear distortion. Turn it down a tad.
Then it says to turn up the amp level until I hear distortion and then turn it down a bit.

My question is am I listening for distortion from the door speakers or subwoofer?
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Old 08-01-2014, 11:05 PM   #2
aerosaaber
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if there's only one level adjustment knob you're listening for whatever distortion happens first.
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Old 08-02-2014, 01:45 AM   #3
TXwrxWagon
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first there is an audio-specific forum on Nasioc.

next: the basic process is simple.

1. choose the type of music you listen too MOST in the format you use most, so if you listen to Metalica/Seven Dust on iPhone then that's the genre and format.

2. set one song you know VERY well on repeat in the format of choice.

3. turn the gain(s) on the amp all the way down.

4. Whatever head unit you have will have a "level range" example Alpine usually goes 1-35. Pioneer 1-40 or 50. Kenwood used to be 1-25... whatever the top level is figure out 75% of max volume. Alpine would be a volume rating of roughly 20-25 of 35.

5. with the amp all the way down take the Head Unit up slowly to 75%.

6. when you hit 75%, now go back to the amp and VERY SLOWLY bring the gain up until you hear audible distortion. back it off 1/8-1/4 turn.

7. Change songs and verify other tracks don't have higher dynamics.

using the "75% rule" leaves you room for more dynamic recordings without worry of trashing speakers.

~Rob
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Old 08-02-2014, 11:39 AM   #4
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Old 08-02-2014, 01:05 PM   #5
TXwrxWagon
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huh..... who'd a thunk it... the old guy (me) might have it right...

http://www.wikihow.com/Set-the-Gain-on-a-Car-Amplifier

~Rob
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Old 08-13-2014, 02:17 AM   #6
UnknownAlly
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my speakers aren't amplified by the amp, only my subwoofer
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Old 08-13-2014, 08:52 AM   #7
bobditts
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Quote:
Originally Posted by UnknownAlly View Post
my speakers aren't amplified by the amp, only my subwoofer
you still have to adjust the gain properly. It will be difficult to hear distortion from the sub (unless it is severe) so use the DMM method to adjust your gain.
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