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More 'Boom-Boom' for less 'Bling-Bling' in an '02 1.8T with Bose system...??

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Old 09-09-2002, 05:50 AM
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Default More 'Boom-Boom' for less 'Bling-Bling' in an '02 1.8T with Bose system...??
I'm trying to help a bud out with his Symphony II Bose system.

I've heard rumours of VAG codes and 'filters' on the trunk mounted sub... ...has anyone improved their system without resorting to aftermarket amps and subs?

Thanks.
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Old 09-09-2002, 05:54 AM
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Access to the internal equilizer was disabled for the Gen2 A4's.
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Old 09-09-2002, 06:12 AM
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Default I had found that you could change the sound slightly by recoding the head unit with a VAG-COM (more)
so that it used the non-Bose equalization settings instead of the Bose equalization settings. It still uses the Bose amp, etc., it just changes the head unit's internal equalization.

I liked it better with the Bose settings in the end, but some other members (ahem, Bob Petruska , liked it much more without them. Here is a link to his opinion about it, along with the codings I had found:<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/101511.phtml">https://forums.audiworld.com/a4gen2/msgs/101511.phtml</a></li></ul>
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Old 09-09-2002, 06:26 AM
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Default even with the VAGCOM?
so he's basically SOL?
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Old 09-09-2002, 06:29 AM
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oops, I hate the way this board posts...but anyway...so you CAN get in with a VAGCOM?!
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Old 09-09-2002, 07:02 AM
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You need a TWIN-COM or modified VAG-COM that can handle two K-lines (radio is on K-line 2)
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Old 09-09-2002, 07:03 AM
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Default Or, if you meant the hidden EQ, no, you can't get to anything custom like that.. just turn the Bose
equalization on/off.
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Old 09-09-2002, 07:40 AM
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would most dealers have this available?
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Old 09-09-2002, 07:43 AM
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Default It seems when I set the fader toward the back (with Bose) I get more signal to the sub-woofer.
It's like the sub-woofer is just treated as just another rear speaker from the perspective of the fader. In other words, the fader can be used as a kind of equalizer.
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Old 09-09-2002, 07:52 AM
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Default Dealers use Audi-provided diagnostic equipment. But yes, they can access the radio and all other(m)
modules without a problem. I'm not sure you would be able to convince a dealer to change your radio coding, though!
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