Hey guys, I've looked all over for info on this and idk If I'm just missing it or nobody has had this problem (which I find hard to believe). Over this past weekend I installed a new Alpine head unit in my 2003 G35 coupe, the install was a breeze, everything got wired up, hell even the bluetooth worked on the first shot. But when I started to adjust the sound to my liking, I noticed no matter what I did, I couldn't get the bass to sound anywhere near how it did when I had my stock bose system in there. Which I would have just kept but I got the dreaded CD ERR FO message and it was toast. I've adjusted everything on this radio and messed with it for hours, I can get the sound to emit some bass, but nothing like before. All the speakers are working, but for some reason they just wont hit as hard. I believe the model of the deck is a CDE-103BT. Somebody please tell me something I haven't tried yet!!!!! haha

 

Bump

 

bump bump

 

Are you using the stock amp or aftermarket?

 

stock Bose amp. The wiring harness I got from crutchfield was for just straight RCA hookups, no wiring for the speakers at all.

 

Ouch

 

yeah tell me about it. I need help ASAP

 

What is the wiring harness you received? Manufacturer and model #?

 

http://www.crutchfield.com/p_1207075...s.html?tp=2977

 

Throwing out some ideas, but it appears the Bose amp is looking for the Differential-Balanced signal it is use to seeing. You are now not providing that type of signal. Another thing to consider is bad things happen in the Bose amp, as far as heavy EQ'ing at various volume levels to make up for cheap speakers the system utilizes. Also there are 6 channels for the Bose coupe, 2 front, 2 rear and 2 rear subs (6x9's in the rear deck). From the stats on that HU, you are only providing the fronts and rears and not the subs, which is where the amp sends your bass. There are a few ways to remedy this on the cheap. Split the rear channel from the HU to also supply the inputs to the Bose amp for the 6x9's is one way. Another is bypass the amp totally and let the HU power the front and rears. HU stats says 18 watts per channel, that should be enough for those Bose speakers. Any other options I could suggest require amp(s) and some more wiring. Hope that helps and good luck.

 

This is 99% likely your problem. Get the PAC ROEM-NIS2 to replace the wiring harness Crutchfield gave you. It'll fix this.

No - While there are 6 output channels from the amp, the Bose amp takes only 4 input channels.

See above.

The Alpine unit probably outputs more watts RMS than the factory amp, so this is a good option, since you'll also bypass the Bose amp's funky EQ, and it will put the full signal to the front and rear speakers, but it won't solve the lack of bass from the 6x9's, and he'll have to switch wiring harnesses to send the amplified outputs back through the stock wiring to bypass at the amp location.

Replacing the amp is without a doubt the best solution. Not the cheapest, but it'll fix everything.

 

Thanks for all the info!!!! I will definitely try that new harness first since that sounds like its the most likely issue. Also just a note, I'm still getting sound out of my rear "subs" aka 6x9's. Idk if the RCA hookups for front and rear are just grouping the front speakers on one level and the rears on another. It's weird because I can adjust the subwoofer level on the HU and it will increase or decrease the volume level for the rear speakers. Sounds to me like I just got the "wrong" harness from crutchfield. Anybody have a website they reccomend to get that new harness???

 

Aren't the factory Bose speakers 2ohm speakers and not a 4ohm like your average aftermarket replacement speaker. If so the radio can not handle this and will either blow the speakers or ruin the radio since it wont be seeing the proper impedance. Am I off on this?

 

Would that matter since it's running through the stock bose amp? All I need to do is adjust the frequency or signal that my aftermarket HU is sending to that amp so I can get the correct sound

 

Aftermarket speakers come in all varieties of ohms, just gotta get the right one.