greekA6

<center><img src="http://ecominet2.alpine-usa.com:7777/img/asb/cva-1006.gif"></center><p>..the volume increases in drastic increments. Do any of you guys know what I need to get? I was told it is some kind of line converter or something. How can I fix that problem cause it's quite annoying? Thanks in advance

KenY

you have pics of the unit installed? not sure about how to get the decrements lower

Johnny Bravo

Might sound like a stupid awnser, I dont know much about Car audio.

The Bose System has its own amplifier, and the stock headunit provides line level signal, not for powering the speakers (bose option) but to be sent to the bose amp for aplification. You might have installed it incorrectly, having connected the line level signals to the Headunits speaker level output.

Im SURE that a high end unit, such as the one you have must have Line Level outputs for you to connect the bose lines too.

If you are using a wire harness adapter, then I doubt it was desined for the bose system.

I would check your connections -
supling speaker level current to an aplifier circiut whis was ment to work with line level, could easily damage your expensive bose amplier (located in the trunk).

what you need to do is...
connect the line level signals form the Headunit to the bose.

Im sure you can find the diagrams somewhere.

I hope this helps.

Keyna

Bose uses a non-standard "line level"

greekA6

thanks, i'll check it out

Keyna

Any decent stereo shop can get you one.

amiro

how's your blackout vinyl tape you have on the S4 grill trim holding up? How long have you had it on now?

PS is your email still @home.com?

AEB_Head

i have replaced my factory Bose amp with one that can handel 1.83 ohms which is the bose speakers. the amp that i have provides a nice smooth and gradual volume increase. i would like to know your exact setup to see what you did differently.

Joe (zyxt)

This is just what I noticed from doing so much work on my system. The Symphony head unit has line-level outs *and* speaker-level outs on the back. The line-level outs have no wires coming out of them in the factory harness, so those aren't even being used.

I was under the impression the non-Bose systems just used normal speaker-level outs to all the speakers, with no external amps. However, the Bose systems (I assume to keep installation cheap and simple) just use an external amp with speaker-level inputs, not line-level inputs. The speaker wires that would normally go to the speakers simply get re-routed into that Bose amp, then the amp just powers the speakers. Very cheap and simple system.

If he's using an aftermarket head unit, he'll probably need to use the speaker-level outputs into the Bose amp. However, the speaker-outs on the headunit might be much more powerful than the Symphony headunit, so that might explain the more drastic increases in volume. (Not sure if it would work that way, but that's my guess.) Seems like the only way to correct it would be to use some sort of current or voltage limiting device in between the headunit and Bose amp.

CMH

speakers run straight of the radio amp. The rear speakers have a amp right on the left rear speaker.