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Brera: Retrofit Sub

Finally fitted the Sub, that I ordered a few weeks
ago, to try and improve the standard install's lack
of low end.

To keep the space usage down, got one of these:


Unit switches on when it detects a signal at the high speaker inputs.

Bought an ISO DIN speaker socket with bare leads
and also screw fit ISO DIN speaker plug to create
a patch cable.

Connected this to the High/Speaker inputs (for the rear
speakers) at the back of the head unit. (Without having
to cut into the loom. )

Ran the cable back alone the centre console.
(One bit still needs to be hidden.)

Power was obtained by removing the parcel shelf,
unscrewing the LHS shelf mount and detaching the
rear fuse box. Nice big always-on +ve available
from the unused fuse holders.

Ground was easily available from a LHS rear light cluster
bolt. (Once I gone and bought an offset 10mm ring spanner.)

Unit was then screwed to the back of the LHS rear
passenger seat. (Need to use shorter screws than those

Job done. Not the sharpest piece of kit, but small, black
and fills in the missing bass from the standard rear set-up.

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Re: Brera: Retrofit Sub

nice one nev...

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Re: Brera: Retrofit Sub

Nice one.

Has anyone tried a retrofit for the standard speakers yet??

I tried turning fader to full rear and that sounds awful. Obviously front tweaters make a big difference but not sure if better rears would help. The Bose in the GTA had twin cone fronts but not sure if it had twin cone rears.

Any thoughts ?

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Re: Brera: Retrofit Sub

The mids in the rear are def the problem.

Also my front woofer trims are starting
to rattle a bit.
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Re: Brera: Retrofit Sub

whats the bass like off the sub unit? do you have it installed with the factory fitted HU and speakers? Whats the system like now as a whole? Thanks.
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Re: Brera: Retrofit Sub

Originally Posted by lawrence_craig View Post
whats the bass like off the sub unit? do you have it installed with the factory fitted HU and speakers? Whats the system like now as a whole? Thanks.
It's a compromise: Not as good as the factory Bose, but
enough to gives good thump and easy to fit.
It brings it up to an acceptable standard.
The standard HU isn't too bad, but the speakers
are a bit of a let down in the Brera IMHO.

For B&M type functionality there is a blaupunkt
phone/MP3 kit available. (try

(I fitted a Kenwood tethered-FM transmitter
MP3/Aux kit that uses RDS for the menu control.
Again it's a compromise in terms of sound quality,
but the menu-ing system displayed on the head-unit
gives that "fully integrated" feel. )

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Hi Nev

I know its been a few years since you installed your Blaupunkt Active Sub, But I am about to do the same.
Can you remember which fuse you used in rear fuse box to supply the always on +ve?
Also, where did you manage to route the speaker cables in the center console ? It looks pretty tight to me !

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I pushed the 2 wires from the amp from behind the fusebox
through a blank fuse holder and looped them through and inserted the stripped
ends into the fuse-holder pins that were connected to the largest
+12v feed. I think it was always on and the amp powered
down automatically when the input levels dropped.

They were still secure when I removed the amp when I sold
the Brera Christmas before last.

The fuses for the amp were in-line ones that I tie-wrapped
to the loom so that I could get at them from the LHS
light cluster access panel.
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Bump for the lazy mod who'd rather PM than search.

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A bit late... but thanks

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