Factory Radio with Sub Question

[Chas87]

Hi, i just recently upgraded from a J30 to my new I35, i had Subs in the old one but used a different Radio, now i want to keep the factory one cause it looks better, so now my new problem is keeping it and still having subs. Heres where im at now, i will get the MTX re-Q (http://www.crutchfield.com/App/Product/ ... EQ&tp=6870), which will restore better bass to the factory signals, which then can be plugged into my old amp and subs, but im stuck at connecting that unit to my radio. Since Infiniti uses the bose system and it has the amps on the speakers. Can i safely splice the wires and connect them to that box, then to my amp etc, will it interfere with the signal being sent to the speakers with it split like that? sorry if my wording is confusing, and if there is an easier way to do it let me kno, Ive read i can use a PAC adapter, but i want the best sound possible while keeping they factory HU, so some type of EQ adjusted is a must. Thanks much for any help.

[coolhand]

Hi, i just recently upgraded from a J30 to my new I35, i had Subs in the old one but used a different Radio, now i want to keep the factory one cause it looks better, so now my new problem is keeping it and still having subs. Heres where im at now, i will get the MTX re-Q (http://www.crutchfield.com/App/Product/ ... EQ&tp=6870), which will restore better bass to the factory signals, which then can be plugged into my old amp and subs, but im stuck at connecting that unit to my radio. Since Infiniti uses the bose system and it has the amps on the speakers. Can i safely splice the wires and connect them to that box, then to my amp etc, will it interfere with the signal being sent to the speakers with it split like that? sorry if my wording is confusing, and if there is an easier way to do it let me kno, Ive read i can use a PAC adapter, but i want the best sound possible while keeping they factory HU, so some type of EQ adjusted is a must. Thanks much for any help.

A low buget fix is the RCA line converters that converts you speaker wire to RCA outputs.

A high buget fix is the sound processor that crutchfied offershttp://www.crutchfield.com/App...=6870they will allow you to controll the frequency gains and dB's.

Here is the problem, using the output from the Bose amp will deliver an input to the amp that is too high and you will have to turn the gains down to the min because of the amp will clip. If you use the speaker inputs before the amp, the signals will be too weak for the amp to amplify.

My 95 had that problem and I am not sure about your system. I would try it and see what happens. You may get it to work with some tuning.

[the converted]

That MTX peice will take care of any level matching that you need so you can grab the signal wherever you want to and adjust it at the processor. I'm interested in exactly how that works to restore the sub signal but it does look like nice.

[Chas87]

Here is the problem, using the output from the Bose amp will deliver an input to the amp that is too high and you will have to turn the gains down to the min because of the amp will clip. If you use the speaker inputs before the amp, the signals will be too weak for the amp to amplify.

Yea,So my last concern is if the Factory speakers will receive a much lower signal with the processor cut in at the HU but before the speakers. I can easily adjust up the gains on the processor so the signal to the sub's are sufficient, but there is the problem of the factory speakers, i may or may not be able to adjust those gains, so thats where im at now.

Also, would i need to cut into all 4 channels of the HU, because if the factory speaks are robbed of some signal power, i can much more accept 2 channels being less powered rather than all 4. Sorry if this sounds confusing (i drew a so -so picture , but thanks for all the help.

[the converted]

speaker output won't change at all. You only need to hook up 2 channels to the processor. What I usually do is hook up ot the front because I tend to fade to the front .

[coolhand]

One question: What year is your car?

Yea,So my last concern is if the Factory speakers will receive a much lower signal with the processor cut in at the HU but before the speakers. I can easily adjust up the gains on the processor so the signal to the sub's are sufficient, but there is the problem of the factory speakers, i may or may not be able to adjust those gains, so thats where im at now.

Also, would i need to cut into all 4 channels of the HU, because if the factory speaks are robbed of some signal power, i can much more accept 2 channels being less powered rather than all 4. Sorry if this sounds confusing (i drew a so -so picture , but thanks for all the help.

You should use the sub speaker wires as your input to you re Q box. The box should have a sub input port.

Try the lines out of the factory amp. If they are to powerful for you tastetry the ones before the factory amp.

I see you stay in Orland Park, not too far from Chicago. If you are gamed I can help you with the install.

[the converted]

Actually, you'll probably want to get the ones before the amp, less chance of signal degradation there.

[Chas87]

One question: What year is your car?

You should use the sub speaker wires as your input to you re Q box. The box should have a sub input port.

Try the lines out of the factory amp. If they are to powerful for you tastetry the ones before the factory amp.

I see you stay in Orland Park, not too far from Chicago. If you are gamed I can help you with the install.

Its a 2004, last year for the I35. "you should use the sub speaker wires as your input to you re Q box. The box should have a sub input port."Dont really understand what your asking me here, other than you may be confused on where im wiring from, the box does indeed have sub support, which it pulls from the 4 channels, the factory HU does not have sub preamp outs, which im assuming your thinking of, no matter everything is ordered up, ill have my car in 25 days after my cousin buys his new G37. Ill post up here later with pics and such, thanks again for all the help too, i really appreciate it

[coolhand]

"you should use the sub speaker wires as your input to you re Q box. The box should have a sub input port."Dont really understand what your asking me here

Sorry I mean your MTX Q box should have a input port for the subs.

[Chas87]

Hey guys, just wantd to stop in and say thanks again for the help, for the future, that box works great, all i ended up having ot do was disconnect my factory sub and run the wires straight to it, it def adds a lot of bass back into it. I have a few finished pics here. http://i41.photobucket.com/alb...1.jpgh ... lb...2.jpg

One question tho, how much would 2 drivers powered at 500RMS hit if they are rated at 350 each, so im 250RMS underpowered, in a vented box it should still be louder than one driver in a bandpass im hoping i dont need to invest in another amp.