99Eternal

as the first poster mentioned have you tried just moving the band down a db or 2 on your eq on whatever frequency band that produces this mid bass you want to tone down? also what do you have your SSF set to on the amp? If that's set too low it will cause popping, hollowness, frequency shifting that will in fact make it sound to me anyways like the LPF and gain aren't doing what they should regardless of how they are adjusted. I'm not well learned with EQ's but I can't see one allowing you to avoid setting the SSF, LPF and GAIN correctly on the amp. Try setting the SSF to around 29-30hz see if that clears up your sound. Took me alot of adjusting before I finally realized I'd had my SSF too low and it has been the biggest improvement moreso than any other setting I've fiddled with. To give you a ballpark mine is set around 2/3 anything lower I get shitty sound. If you have a dmm you can play a 29hz tone medium volume, look at AC voltage on your speaker terminals, and starting with the SSF all the way down to 10hz, slowly turn it up until you see the voltage change. When it begins to change this means the "top" of the 24db/octave cutoff slope on the SSF is at whatever frequency tone you are playing (29hz in this example). You now are just starting cutting off 29hz to the least degree possible, and each frequency below this is cut off at an increasing rate. It's the best way i know of to know whereabout (within the range of the cutoff slope) your SSF actually is. Note this is not a precise setting and does not mean you have cut out 29hz and below. The cutoff starts at 29hz as soon as the voltage changes.

Thanks I think i'm good now. One thing - when you say dual inputs are for multiple runs of wires, do you mean from the battery to the amp, or from the alt to the batteries? Or both? I ask because I am debating 1 or two runs of 1/0 from alt to batteries, I could still run just 1 pos and 1 neg to the amp without issue, correct?

Alright. But see I don't have a battery up front. As mentioned, Chevy Cobalt stock batt location is in the trunk. So it will only be 2 batteries totaI. Most of the info i can find on this is with a starting battery up front. I know electrically the connections should be the same, just want some confirmation. I am starting to think I was wrong about doing a run from alt to each battery postive. http://www.stevemead..._1#entry1980603 according to that thread I should be connecting my alt to only one battery? and then link that battery to the second, and connect the amp to the second batt? That seems logical I suppose..any input? EDIT - I think i was wrong in first post saying 1 pos run to each battery. I thought that was the point of two runs, to give even alt power to each battery but now I am starting to think it's just to effectively double the size of your wire. Is that correct? Is 1 run to each batt pos from the alt a no-no? I'd love some more input on this...I'm mentally exhausted from work and just can't get this straight in my head.

EDIT: I found a good tutorial on here. http://www.caraudio.com/forums/wiring-electrical-installation-help/398527-dual-battery-wiring-tutorial-why.html It answered my questions. I didn't understand why 2 fuses are required in between the two batteries, I would think one would pop breaking the circuit. Someone had said because if one end comes out of a fuseholder, it could start a fire. I see how that is added safety. But on the other hand, even with the second fuse, if the wire on the battery side of the fuseholder came loose, you'd have a fire, and with two fuses there's double the connections that could come loose. I guess in the end it's still slightly safer. Hey everyone, my first post here. I am about to start upgrading my electrical in preparation for my two DC level 4 15's on a 3.5k, and I have a few questions. I've searched through many threads on this topic but I can't seem to find an answer. **Chevy puts the battery in the trunk** in the cobalt which I have already replaced with an XS D3400 around a year ago and I plan to add a second D3400(or possibly a larger one), as well as upgrade my alt to a 240+ with all 1/0 wire. I'd like to confirm the connections for both the alt to the batterys, and ask about connecting the amp to the two batteries. From what I understand for alt to battery I would: 1) do two fused @ 300a (+) runs of 1/0 from the alt, one going to each + on the battery. 2) jumper the batteries, + to +, - to - with a 300a fuse on just the positive jumper? or negative jumper as well?. 3) ground both batteries to the frame. but do I go from each (-) battery post to frame? I assume so but would like confirmation. 4) make sure all my factory grounds are upgraded to 1/0. Then for the amp...I think I understand how dual inputs would work. each battery positive would go to one of the inputs on amp, same with negatives? Is that right? What I really don't understand is, if i wanted to do this without dual inputs, how I would connect the 2 batteries to the amp? Just pick a battery? I am sure I have seen multiple batteries with only 1 + and - neg input. I just can't wrap my head around it. Eventually I will probably do dual inputs anyways but I want to understand this before I put power to my new equipment! Thanks for any help!