Need Help New Alpine Hu

[dominick1234]

I just bought a new alpine cda 9815, pulled out stock bose radio on my 93 j30 but after wiring everything the speakers give out no sound. I thought this was caused by no antenna adapter but after i bought it and still didnt work dont know what to do...

[Rex]

Are you using the (specially made) adpater to step the new HU down to the correct level for the Bose speakers?

Or did you re-wire the whole system and are no longer using the Bose speakers and amps?

A quick search for Bose adapterturned up this thread.

<Good luck, and welcome to the board>

[dominick1234]

u need a special adapter?? all i got was a wire harness, then i wired the power lead to battery like u suuposed to and attached antenna adapter that i got from best buy, am i missing something?

[dominick1234]

and i am using the stock bose speakers to answer your ?

[Rex]

Hmm, the adapter in the link is supposed to be for 1995-2000 Nissan/Infiniti cars w/Bose systems. If you want to (or have to) retain the factory speakers when swaping out head units.

The Bose system has the amp at each speaker and the amp is expecting a low level (not spreaker level) input. The amp then drive the speaker which are much lower "resistance" (1 ohm or lower) than normal car stereo speakers (4 ohm).

Unfortunately, you can't just add an aftermarket head unit to an existing Bose system car.

[dominick1234]

thanks everyone for your input and advise, number one yes you can weire an aftermarket hu to a bose system. what happened to me was that the internal amp in each speaker has a remote turn on, me not having subs yet didnt think i need to wire the rt in but apperently you do.

[dominick1234]

one more thing the radio is very loud at low volume level is this because of the 4 ohm 1 ohm difference?

[Rex]

one more thing the radio is very loud at low volume level is this because of the 4 ohm 1 ohm difference?

If you're sending a high level (speaker wire) signal to each amp, it would'could be very loud at low volume. The amp at each speaker is expecting a low level signal (like RCA jacks) and then the amp steps it up from there.

I can't say for sure, but running an amp with high level input, when it's expecting low level input would seem to me like running a 110 volt blender on 220 volts. It would Kick Arse while it ran, but eventually it would be toast.

You might ask someone at your local stereo shop. Better to be safe than sorry.

[dominick1234]

are u telling me that the original bose radio doesnt have an internal amp? only the amp that is connected to each speaker? and if it does eventually fry i could prolly upgrade the speakers?

[Rex]

From the best of my knowledge and experience, the Bose head unit does not have an internal amp. And you're right you could replace them if/when they burn up. My concern would be after pro-longedlistening that they may over heat. I don't believe they have built in fuses to help prevent any other issues that may happen due to over heating. I'd keep my nose on the look out for smoke .

<sorry, I don't mean to sound like an alarmest>

[dominick1234]

its ok thanks for all the info its much appreciated

[dBDevil]

Best idea is to use the harness you have and bypass the amps on each speaker. That's easily done by looking at the plug at each speaker. Get the two smaller gauge wires and connect those to the speaker. Be sure to compare the colors at the speakers and the radio to get the polarity right.

[ayjay]

i'm not too sure on this but i think that the impedance ratings for the bose speakers are 1ohm... that's at least what my buddy's bose speakers were in his rx7... the amp on the deck is definately not 1ohm stable, and you'll fry it really quickly tryin bypass the amps on the speakers... i think :pface

[dBDevil]

That's why you're putting in new speakers when you bypass the amps. The two small wires are the input for the amps....i.e. output from the radio. You won't have anything to worry about provided you add aftermarket speakers while bypassing the amps.