[rxter]

The PO installed JL Audio TR400s in the rear and TR525CSIs in the front. Highs and mids are very good. Lows are weak weak weak. I added a 10" sub in the trunk with provides the very very lows. It works fine to provide the thumps. If I increase the crossover to higher than 80Hz and try to use it to compensate for no bass in the little JLs it just goes all wrong - muddy lows and overboosted thumps. So I thought I might add some bigger speakers in the rear of the cab. Maybe some 6s in a box where the cab cubbies go. I don't want to remove the 4's in the rear sidepods as they provide nice spacing - I just want to get better lows.



If I tried that I'll have a resistance problem - 4ohm + 4 ohm = 2 ohm IIRC. So, is there a way I can add something in line that would allow me to add a pair of 6's to the 4's, or would I have to replace the 4's alltogether? Other ideas?



Thanks



Joe

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[flash]

nothing larger will fit in the rear of a cab - the problem is the mechanism gets in the way - been there



the 400s only go down to 71 hz in a perfect world, and likely really only go down to about 85 - you're never going to get much out of those, and i wouldn't try, as you are far more likely to just get distortion



the 525s go down to 63, so some help can be had there, but it will all come down to the enclosure





the best you can do is dynamat the heck out of the car, and enclose what you have - then play with the crossovers on those speakers (not the sub) - if you put caps to cut off anything below 150 in the rear, and then let the fronts work a bit more by improving and sealing up the enclosure, you should find that you gain at least a good portion of the low mids you are looking for



if that isn't enough, you could cut into your door panels and mount a larger driver up front where the mid would go

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[AJG]

Low bass even in a decent size room can be a problem sometimes. Never mind a car! With 4 smaller drivers, series parallel gets you back to 4 ohms or two 8 ohms in parallel = 4 ohms. The trouble with bass speakers is (1)If their infinite baffle then enclosure volume increases massively for little real gain in bass extension/quality. (2)If ported then all of these speakers, regardless of claims by manufacturers suffer from various maladies as there is an un controlled resonating air column in the speaker. No the port does not control that before you reply/insist! Best base is from a transmission line type enclosure which dissipates rear energy more convincingly and can even help to reinforce the lowest frequncies. Requires a big cabinet, but there is a metal full range driver from E J Jordan which might do it. Don't know if its compatible with in car hi-fi amplifiers.



Andy

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