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<blockquote data-quote="eharri3" data-source="post: 5769050" data-attributes="member: 591579">I have a DEH 980Bt. In all honesty I can tell you from experience I set my gains, matched everything up, did some minor tweaking on the EQ. That&#039;s about it. I don&#039;t like the crossover settings on the HU so I use the ones on the amp. I ignored SLA, COMBIX (or whatever it&#039;s called) and only occasionally turn on BBE but leave it at zero. Anything that plays with some form of boost will usually affect specific frequencies below or above a certain point. If your sub is crossed over to play in the range affected by a given feature, it will get louder and clip sooner if you enable it. SW controls separately affects the volume of the subwoofer and if it works the same as it did on my Alpine, this isn&#039;t a boost. Rather anything below the max is an attenuation of the sub. I prefer to set mine with it at max and cut it as necessary (though I never have to, my components are pretty well matched.) Better to do any tweeking using sub controls rather than bass boost, as that allows you to adjust bass while leaving your door speakers out of the equation. I find it better to set the gains for max output at max subwoofer level then make cuts than to the set it with the sub controls lower and risk clipping if I decide to bump it up a bit.I prefer to adjust volume as needed myself for different sources rather than setting SLA since not every song I play on every source is at the same volume.</blockquote>

[QUOTE="eharri3, post: 5769050, member: 591579"] I have a DEH 980Bt. In all honesty I can tell you from experience I set my gains, matched everything up, did some minor tweaking on the EQ. That's about it. I don't like the crossover settings on the HU so I use the ones on the amp. I ignored SLA, COMBIX (or whatever it's called) and only occasionally turn on BBE but leave it at zero. Anything that plays with some form of boost will usually affect specific frequencies below or above a certain point. If your sub is crossed over to play in the range affected by a given feature, it will get louder and clip sooner if you enable it. SW controls separately affects the volume of the subwoofer and if it works the same as it did on my Alpine, this isn't a boost. Rather anything below the max is an attenuation of the sub. I prefer to set mine with it at max and cut it as necessary (though I never have to, my components are pretty well matched.) Better to do any tweeking using sub controls rather than bass boost, as that allows you to adjust bass while leaving your door speakers out of the equation. I find it better to set the gains for max output at max subwoofer level then make cuts than to the set it with the sub controls lower and risk clipping if I decide to bump it up a bit. I prefer to adjust volume as needed myself for different sources rather than setting SLA since not every song I play on every source is at the same volume. [/QUOTE]

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