i have a alpine headunit in my wite cl and also have alpine in the whole car as well and ijust bought two 10" polk subwoofers today. They are rated at 150rms easch and 400peak. Me and my uncle tried them out in the trunk without in amp and they sounds great until we closed the trunk. I want to know what can i do and what size amp to get? The front speakers are 130 peak and 30rms and the same for the backs.

 

You should get a 6-channel amp, 1 channel for each of the speakers (including the subwoofer). If you can somehow feed 100-150 watts to each of the subwoofers and 30-50 watts to each of the front and rear speakers, your audio setup will sound great! I don't know if there is an amp that would do that. If you can't find one, buy two amps. 1 - 100-150 watts x 2 for the subwoofers and 1 - 30-50 watts x 4 for the front and the rear speakers. This setup will give you the same results.

I hope this helps.

[ 07-25-2001: Message edited by: Jawo ]

 

Look into a Kicker 1302(130x2). This is what I have pushing 2 Kicker Solo L7's which RMS at like 450 a little under powdered but they still slam. Then I would go with a second 4 channel amp for the other speakers.

 

Not 100% sure on the trunk problem, possibly the trunk seal is too tight to let them breathe.... i assume your subs are not in a sealed box, if the box has ports it needs to breathe..move the air somewhere, if the trunk is too tight they might not be able to move... when it was open there is plenty of room. In any even, it should still be ok with the trunk closed but that may be the simple reason, try opening your pass thru and see if that helps. I have a Lanzar 15' in mine and it works great. My head unit is a Panasonic with sub control on it, just have outs going to the trunk and into a shitty california amp (its shitty but does surprinsingly well) cuz my buddy blew up my last one and got this to replace it. ok, you have good goods, the head may have enough juice to power all interior speakers, if not just add a small 4 channel for them. I dont have a specic reccomedation for the amp, just make sure you have enough wattage, especially if you will be running with the pass thru closed. Oh, this may be your problem, since i think of it, my 15' apparently blew the cone off track in my left rear deck speaker. It may just be too sealed back there. ok, open the pass thru and let me know what happens

 

i know in my car it makes absolutely no difference in sound if the pas throu is open or not. my 15 is in a sealed box

 

well, im not quiet sure of your set up there but as per the trunk...
if your speakers are facing the rear seats turn them around... face the speakers towards the trunk hatch... I had a similar problem... if my trunk was open, bass was bopomin, but once it was closed, sounded like a$$... the reason is that theres a sound proof steel plate on the back of the rear seat and it deadends the sound and air flow... if thats the problem, once its turned yuo will hear everything you want to hear...

 

you will need 2 amps. one for the sub and the other for the speakers (optional depending on the power of your receiver). the amp you get should peak under your speakers peak rating, that way, you wont blow them out. I used to have a pioneer 45x4 w/ mosfet and i didnt need an amp for the speakers.

 

the speaker direction and box type will affect the sound too, like mentioned above. But i think you will need an amp for the sub. I dont know anyone who doesnt use one.

[ 07-26-2001: Message edited by: 3PointZero ]

 

The seats wont bother it much, as long as u have a few inch space. The problem here is really the box type. If you have a sealed box you should be cool either way (open pass thru or not) but if its ported, the pass thru will help. update us.

 

I have proven to be a fact that the seat wil lmake a difference.. there is a metal sheeting thicker than .080 metal blockin the way to the cab of the car... IT MAKES A DIFFERENCE.. huge difference!!! TRUST ME... i went throiugh hell trying to figure out the problem... consider it very useful free help!!!!

 

It will make a difference as far as how much sound will make it to the cabin, but it will not make a difference if the speaker is 3 inches from the seat or a foot, or facing backwards. Bass is omni-directional (unlike treble which needs to be focused) and will find the same "audio openeings" no matter which way it is directed. As long as you have enough room between the port and the seat, so that it can move the air out freely, u will be ok. Just use a sealed enclosure and a woofer thats compatable for that type enclosure and youll be better off.

 

sweetwhitecl3.0

here is the best advice you can get, and it's free..

put the speakers back in the box and return them to the dealer. Let them know that you don't know jack about audio.. that should solve your problem.

 

Pointing the subwoofer towards the trunk hatch will cause the bass to reflex and bounce back towards the cabin, but I dont think this is the issue here. Read the inital post. HE DOES NOT HAVE AN AMP. That IS the problem. Get an amp and you will be fine. Problem solved.

 

Yeah 3PZ, i think u might have something there .. HA. I kinda lost focus on the initial post, and enetered a parallel topic. OH hell, Once you get an amp, if u still have problems, open the pass thru (assuming a ported enclosure) and see what happens. I would really like to know now. peace