BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > F20/F21 audio upgrade...my build thread with pics...
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      05-21-2013, 11:48 AM   #23
MI35i
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progress update?
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      06-07-2013, 06:34 AM   #24
Catch_me_if_u_can
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Excellent write up, i want to try this also, been waiting for this since i got my F20
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      06-07-2013, 10:00 AM   #25
donaldt
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very nice!
just wondering
is it worth doing the upgrade if the H/K is already fitted?
do we all get a 6" underseat sub H/K or not H/K?
can I just swab the 6" for an 8" like you did without changing anything else?
I found that the major problem with the H/K is that there is a little gap between the sub and everything else
so as the bass go down, it first hit a point where there is nothing, then progressively more bass, and at a point it has too much and start to boom
perhaps swapping for an 8" would be a good idea? (not sure if the original H/K amp is powerful enough?)
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      06-07-2013, 10:05 AM   #26
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nice project!!.. I was on the wall with the HK upgrade as well.. so glad I decided to get it now!
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      07-04-2013, 05:42 AM   #27
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any progress?

cheers =)
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