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<blockquote data-quote="USMC_Metallica" data-source="post: 1853531" data-attributes="member: 560442">i have an MA AUDIO HK-1398 powering a pair of 12&quot; MA AUDIO XL&#039;s. subs are dual 4 ohm DVC rated at 600w/1200w and the amp is running at 700w RMS x 2 @ 2 ohm and it is class a/b power.now occasionally this thing goes into protect when it seems to be hitting lots of really deep notes. sometimes like tonight it does it when its not hot at all. i have the bass boost on the amp is maxed at 18 dB, the gain is a little over half, the bass on my h/u is 2 of 6, my h/u volume is at 15 of 31, and my x over gain is a little over half. doesnt seem like im overdoing anything except maybe the amp bass boost? tomorrow im going to turn that down a bit and give it a few days to see if it keeps going into protect. if it does, am i just better off getting a class D amp? also, will cutting that bass boost lessen the really deep notes and allow me to turn up the bass from the h/u and get a better rock sound from the subs?i have a compact truck with the box barely fitting behind my seats. i have the amp mounted on top of the box about 1/2&quot; up, so it should be getting decent ventilation?</blockquote>

[QUOTE="USMC_Metallica, post: 1853531, member: 560442"] i have an MA AUDIO HK-1398 powering a pair of 12" MA AUDIO XL's. subs are dual 4 ohm DVC rated at 600w/1200w and the amp is running at 700w RMS x 2 @ 2 ohm and it is class a/b power. now occasionally this thing goes into protect when it seems to be hitting lots of really deep notes. sometimes like tonight it does it when its not hot at all. i have the bass boost on the amp is maxed at 18 dB, the gain is a little over half, the bass on my h/u is 2 of 6, my h/u volume is at 15 of 31, and my x over gain is a little over half. doesnt seem like im overdoing anything except maybe the amp bass boost? tomorrow im going to turn that down a bit and give it a few days to see if it keeps going into protect. if it does, am i just better off getting a class D amp? also, will cutting that bass boost lessen the really deep notes and allow me to turn up the bass from the h/u and get a better rock sound from the subs? i have a compact truck with the box barely fitting behind my seats. i have the amp mounted on top of the box about 1/2" up, so it should be getting decent ventilation? [/QUOTE]

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