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<blockquote data-quote="quackhead" data-source="post: 7751971" data-attributes="member: 573547">HUH?..you set your gain to 3/4 turn clockwise??do you understand the actual function of your amp gain?..it is to match HU output voltage to the amps&#039; input voltage. When you set your gain, how much were you able to turn up the HU volume before you felt like it was loud enough, or too loud, even?..1/4?, 1/2?, 3/4?I am not too familiar with AB subs, so I cannot guess which ones they are just by power rating. But the AB amps i have ran across do close enough to rated, and maybe more during peak transients. What ohm load are you running?..is the box specd to optimum dimensions?..a little smaller might handle more power, a little bigger might handle less power.. what is the tuning frequency of your box?..this should determine the subsonic filtering, due to uncontrolled cone travel below tuning frequency. This can destroy your subs from over excursion..personally, I use the -6 db mark on my setups. Most subsonic filters use a 24-36 db/octave cut-off slope.As far as LP filtering, a good target is around 60-65 on subs and 80 on HP, to account for the 70 hz spike common in a lot of vehicles, but this also depends on your sub tuning frequency, midrange driver extension/placement. I prefer a 18 db/octave slope on subs at 63hz and 18 db/octave slope on mids at 80hz...but I usually play with that depending on my listening tastes...you prolly will too.all of the above should be taken into consideration in some form or another when setting your gain(s) as well...u might use a DMM, but trust your ears, eyes and heart.</blockquote>

[QUOTE="quackhead, post: 7751971, member: 573547"] HUH?..you set your gain to 3/4 turn clockwise?? do you understand the actual function of your amp gain?..it is to match HU output voltage to the amps' input voltage. When you set your gain, how much were you able to turn up the HU volume before you felt like it was loud enough, or too loud, even?..1/4?, 1/2?, 3/4? I am not too familiar with AB subs, so I cannot guess which ones they are just by power rating. But the AB amps i have ran across do close enough to rated, and maybe more during peak transients. What ohm load are you running?..is the box specd to optimum dimensions?..a little smaller might handle more power, a little bigger might handle less power.. what is the tuning frequency of your box?..this should determine the subsonic filtering, due to uncontrolled cone travel below tuning frequency. This can destroy your subs from over excursion..personally, I use the -6 db mark on my setups. Most subsonic filters use a 24-36 db/octave cut-off slope. As far as LP filtering, a good target is around 60-65 on subs and 80 on HP, to account for the 70 hz spike common in a lot of vehicles, but this also depends on your sub tuning frequency, midrange driver extension/placement. I prefer a 18 db/octave slope on subs at 63hz and 18 db/octave slope on mids at 80hz...but I usually play with that depending on my listening tastes...you prolly will too. all of the above should be taken into consideration in some form or another when setting your gain(s) as well...u might use a DMM, but trust your ears, eyes and heart. [/QUOTE]

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