Jett2009

Ok ive searched and searched till i couldnt anymore. i think i just dont know what key words to go with. When i upgraded my system with a d-din radio i wanted to keep the bose in order. I just now want to know if there is any way to control the amount of base going to the door speakers. Is it just something that got hooked up wrong. i pulled the system and ran a rca to speaker wire cord for the bose but im not hearing any change in base when i mess with the settings. I figured it would do it job but idk. Also with the wires running to the bose amp. IF(idk for sure) the bose amp is supplying the tweeters, if the cossover "relay" i guess is the right way to put it going to keep my tweets from overloading or do i need to just pull the system back out and hook up my old 10" subs form my old car??? i swear ive read every post i could but just cant figure it out. First time ive hooked up a system with Bose.

Carbon8

iTrader: (4)

Firstly idk what you have done, but your thought process and fundamental knowledge on car audio is non existent. Cross overs are not relays they are an RL/RC filter blocking a range of frequencies, they do not control or limit amplitude. So if you blow them it's because your tuning was crap.

Metra kit is all you need, why are you hooking up RCA's? Those are only for aftermarket amps.

Bose amp utilize high output inputs via the factory wiring harness. As such all tuning is done on the head unit via the equalizer there is no way to tune the bose amp itself

Stars25

iTrader: (1)

That is actually incorrect. With the bose system and and aftermarket head unit you have to use the RCA plugs rather than the speaker wire connections.

Carbon8

iTrader: (4)

Maybe next buy the proper Metra kit that has the bose amp interface. Also enlighten us as to how you connected RCA's up to the bose amp when LOC's will only convert a high level signal to low level. LOC's will not convert a low level to a high level.

Jett2009

I know its not a relay, i just dont know what to call it. Ive never hooked up a full blow out the azz system. Ive only done small little things which was i posted this lol. Everything ive read has said to get RCA cables to run to the Bose amp. If there is a better system i didnt/dont know about it. I just would much rather have this done properly and i know the audio places around here dont know jack about it ( ive asked n got looked at stupid). and the best buy here blew up my friends radio and his wire harness melted so i dont trust them for anything. Like i said though, i just feel like something isnt right. my bose subs do nothing with the equ on the radio.

Carbon8

iTrader: (4)

Still wondering where you all are getting at saying you can hook up RCA's to the Bose amp. Also the Bose system does not have factory subs. It has 9" free air door drivers that cover a completely different frequency range than subs do. Like I said buy the metra kit, read the instructions. It is one of the most complicated kits to install due to the HVAC and OBD interface. I would highly reccomend you take it to a shop.

Molloy9874

I have to agree if you don't know what your doing the metra kit is great but extremely complicated and if you don't know what your doing get someone who does to do it for you worth the money as it can be a headache

firebirdude

iTrader: (3)

The factory Bose headunit outputs a very low-level signal to the Bose amp. Though it uses regular speaker wire connections, the amplitude is very low. Installing an aftermarket headunit with built-in amplifier can create some problems. Instead of sending a signal of 0.5-3W/channel to the Bose amp, you're sending 10-12W. As many have found out, this leads to extremely high volume levels with the aftermarket headunit volume set very low. Increasing the volume further leads to heavy distortion. The two solutions we have come up with is to use a resistor padding method for connection OR use the low-level RCA outputs from the aftermarket headunit. I'm not sure why you're getting so bent out of shape over this. This is nothing out of the ordinary or anything specific to the RX8. This is the case with many factory amplified systems, regardless of make/model. Metra makes several harnesses with RCA built right in. Here's one for a Toyota amplified system.

An RCA connection is nothing special. It's still just a positive and negative AC signal.


In regards to your comments about low RCA output voltage, I'll certainly agree that manufacturers have been moving the wrong direction on this. 2V has been the standard recently. Whereas 4V was common on even mid-range headunits ~8 years ago. Very odd. But as I said above, the factory Bose headunit outputs a very low-level signal to the Bose amp. Though 4+V RCA outputs would certainly be beneficial from a noise rejection standpoint, they're not absolutely vital to get you up and running in this case.

k_9virus

I agree...after setting up my deh-4500bt with my BOSE system I've noticed that the door handles rattles even at low volume...Even if I fine tune the built-in equalizer and some tweaking in the headunit Im still not satisfied with the sound quality that came out of BOSE amp ... but overall it's clean output maybe im just gonna put some dynamat as solution to rattling issue