Expert: Ernesto R - 3/16/2010

Question
Hello Ernesto,
I am just wondering that after I have hooked new head unit Alpine up (1 din) and connect all harness for speakers I can listen radio only, no sound for usb and cd.
Infiniti G35 2001, bose amplifier and subwoofer. The head unit has buil in amplifier 50W-4. Anyway there were labels on each wire front-rear-left-right and I am pretty sure that connections were done well. I reckon it is impossible to use both amplifiers together but I can listen radio and quality of sound is pretty good.
I tryed to turn power of internal amplifie off by sound menu of Alpine unit and sound disappeared at all it means that internal amplifier works but still no sound from CD (I can see time and name of cd track only)
I disconnect Bose amplifier and connected wires from head unit (bypass factory amplifier) to speakers and no result, did not work anything. The sound depends on factory Bose amplifier but cd and usb it doesn't recognised.
I am really confused and nobody can fix that.

Thanks,
Nick

Answer
this is a very easy fix, the main problem now is the signal that you have,
your factory radio power was 1/4 of a watt x 4  total 1 watt
and the bose amplifier take the signal to make it stronger

now you are using a high power radio, 45w x4 this is working now but it is going to kill your bose amplifier,in a few weeks, did you notice how loud it is ?
if the amplifier is bad it will cot over 400.00 to replace, if you decide to unplug the amplifier and wire the speakers to the radio, the radio will burn or go in protection mode and
there will be no audio,
factory bose speakers are 1 ohm  alpine and any other radios don't like speakers under 4 ohms

to solve the problem  you need to install this
http://www.oemautosound.com/pc-598-166-oem-interface-differential-converters-uni...


after that is done cut the blue wire and change it using the other blue from the radio

don't cut corners and try to save money now because , it is going to cost a lot more in repairs

good luck