8v-of-fury

I have a 50x4 JVC deck powering two 4x6 speakers up front and two 6x9 speakers in the rear. The fronts are no name walmart speakers, so they can probably handle 20w lmao.. they need to be upgraded The rears are a pair of Blue Pyramids, cant be sure of their power handling ability.. but they sound great when cranked soo..

I have a box in the trunk, its a prefab dealio, 2 10" subs in a bandpass (4th order?) box. The box is rated at 300w so im guessing each speaker can handle 150 rms? Either way i have two amps on the back of the box powering these two subs. A 340w Jensen, and a 330w Scoshe or something.

It was a dirty install, I have both amps powered from a 12 or 14g wire

I am now looking to go back on what I did and fix it I will using jumper cables to make a power and ground directly to the battery. They will be 8g and can handle 200 amps, so that will leave room for upgrade as well down the road as it will then be good for 2400w. I feel this upgrade alone will improve the bass, as it can at most be getting right now, 10v at the amps?? I mean according to my readings it is ok to run 57amps across 12g @ 10ft. So upping to 8g will allow 145a across 10ft.

I would also like to add a 4 channel amp and crossovers for the speakers. Is there a way that i can get set it up so that the fronts get mids and highs, the backs do mids and highs, and then leave the bass completely to the subs?

I'm not looking to make any sort of MAD crazy bass, as my system already suffices. Just upgrading it to to sound decent is what i'm looking for.

Denonite

iTrader: (1)

easiest way to route mids/highs to the front is by getting a 4 channel amp with built in crossovers (high pass or hp filter set at 80-100hz) will allow frequencies above that point to go to the front and rear speakers. The band pass box only plays bass due to it's design, so no low pass crossover is necessarily needed for it. On another note, those wire sizes are way too small for your system. Based on your amp's ratings (an assuming they are peak ratings) both the sub amps should be about 300 watts rms, and if you want to add a 4 channel for the front, that will add another 150 watts or so...that's a total of about 450 watts rms. A 12awg wire is good for only about 150 watts rms at 10 ft. or about 22 amps. An 8 awg is good for 350 watts rms or about 55 amps, so either run at least a 10 awg to each amp from the battery (make sure you fuse them appropriately), or a single 4 awg to a distro block, and 8-10 awg to each amp (this is the preferred method). The 200 amp ratings for the booster cables is for short periods like boosting a car.

8v-of-fury

Yah I know the wire choice was too small, it was a dirty install 4.5 years ago

Ok, what I'd like to do is run the third 4 channel amp under my dash. In my 81 I have a ton of room on the passenger side to fit a large one, so a small 300 peak amp will fit nicely. Also that way it can have its own 10g power from the battery, and the 4g can go to a distro block in the trunk, and then 10g to each amp. It will be easiest to fit a 10g power wire on the amp anyway.

I actually have two sony subs that I am going to build a bandpass box for.. The XS-L104P5B.

Details:
» 10" 4-ohm subwoofer
» five-sided polypropylene cone with rubber surround
» power range: 80-330 watts RMS (1,200 watts peak power)
» frequency response: 18-2,500 Hz
» sensitivity: 88 dB
» top-mount depth: 5-15/16"
» sealed box volume: 0.78 cubic feet
» ported box volume: 0.91 cubic feet
» Recommended Q-Logic Box Type: 1, 2



So I figure building a box to make these play about 35-40hz being powered with 600w rms at 2ohms should pound eh? I will be looking for a mono D class amplifier at that point.

I know everyone says they suck but listen to this story. No word of a lie, I built a box for my brothers car. He had one of those XS cargo visionik sub and amp combos. It was a sealed box, and i think the speaker could handle 35w rms.. I built a bandpass box out of particle board! not even mdf.. I built the box to that speakers specs. I tuned the ports so it would play frequencies of 33hz. It had two 3.5" abs pipes that were 11" long for ports.. it destroyed my dual 10's in a bandpass box with two amps on it. Just a 35w speaker and a 25w amp probably... DISGUSTING! I know if i build a bandpass specifically for these two sony's i can make a very very very good sounding system out of them.. no sealed or ported boxes for me, Bandpass all the way brotha.

Bezrq

Badpass boxes sound nice on some tunes but are not well rounded hitting... To each his own!

audio1der

AND, they hide distortion. You can do WICKED, awful things to a sub in a bandpass, and you cannot tell; it just gets louder and louder while killing tiself.