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PostPosted: Sun Oct 05, 2008 6:45 pm 
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Joined: Sat Sep 18, 2004 11:26 pm
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Location: Wisconsin
Hi im driving a Volvo 850T right now (i came here instead of the volvo forums because I like the people here!). Basically the original head unit is decent sounding so Id like to keep it in until I can afford a double din replacement. Obvious problem is their are no sub outputs. Any way I can make this work? Im thinking not, but id like to hear it from you guys.


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PostPosted: Sun Oct 05, 2008 7:58 pm 
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Location: Ottawa ONT.
Couple of ways to do it. Get a line out converter and run its output to your amp. It will take the speaker level signal and convert it to line level. You would want to splice off your rear speaker wires. It won't be a true subwoofer output as you will still lose bass if you turn the fader towards the front. The other way is if your amp has a high level (or speaker input) input you just splice the rear speaker wires to the amp.

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PostPosted: Sun Oct 05, 2008 11:05 pm 
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Thanks. I'll get a converter. Just a cheap solution till I can afford a double din touch screen :twisted:


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PostPosted: Fri Oct 17, 2008 9:33 pm 
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Location: Georgetown, Guyana
There used to be active cross-overs with the line level converter built-in - that's how I did my first subwoofer (a home-brewed isobarik bazooka).

The current sub is driven directly off of the rear line outputs (no rear speakers) and I use the fader as a level control.

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PostPosted: Fri Oct 17, 2008 11:04 pm 
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Do you find you have enough power to run the sub well?

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PostPosted: Fri Oct 17, 2008 11:17 pm 
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m wrote:
Do you find you have enough power to run the sub well?


If that is addressed to me - the current sub is an active sub with a built-in cross-over and a class-d mosfet power amp fed from a mosfet dc-dc converter, so yes, I have enough power - even if my previous post suggests that there is no amp :-P

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PostPosted: Sat Oct 18, 2008 12:21 am 
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fordem wrote:
If that is addressed to me - the current sub is an active sub with a built-in cross-over and a class-d mosfet power amp fed from a mosfet dc-dc converter, so yes, I have enough power - even if my previous post suggests that there is no amp :-P



Yes I missed the line out bit and saw it as you were running the rear speaker wires to the sub.

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