E46 Convertible Rear Seat Amplifier Mount - image

Files (1)

E46_Convertible_Amp_Mounting_Plate.stl

STL

66.5 KB

Print plan

Exact totals not supplied

Print setup plan

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1 model file

Material plan

PETG

Published material guidance; still check heat, UV, load, and printer compatibility.

Starting setup

25% infill

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Final totals

Confirm in slicer

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Reference shelf

Recommended filament for this print

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Referenced item	What to verify	Price & availability
PETG filamentAmazon · Affiliate link	Amazon product page for 1.75 mm PETG; confirm colour, spool size, print temperature, seller, and delivery region.	Check price at Amazon

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Interior

E46 Convertible Rear Seat Amplifier Mount

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Print this part

Use the part context as a starting point, then confirm geometry-dependent values in your slicer.

Files

1 hosted model file

STL

Material start

PETG

Saved part guidance

Strength start

20-30% infill for sufficient strength and minimal weight

Saved part guidance

Orientation / supports

verify in slicer

Exact totals

Slice for grams + time

Model geometry and final settings determine both

Vehicle exposure

Cabin/interior use; avoid high-heat zones

Open the STL, 3MF, or OBJ model in your slicer before printing. Exact grams, time, and final support placement come from the actual slice. Test-fit and heat-check the part before installing it in a vehicle.

License & use

CC BY

Commercial use allowed

Attribution required

The file license permits commercial reuse, subject to any applicable attribution or share-alike terms. License status does not verify vehicle fitment, OEM rights, design patents, or safety.

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Description

This is a very simple base plate with holes that line up with existing bolt holes inside the rear seat of an E46 M3 convertible (and, presumably, other E46 convertibles). My goal was simply to do a subwoofer install that a) used no trunk space, and b) was as stock-looking as possible. I used a Timpano TPT1400 amplifier due to its physically small size. Using this plate, I was able to mount the amp completely inside the rear seat rather than in the trunk. I mounted a 10" Kicker CompVR in the ski pass, replacing the stock 6" subwoofer. I'm sure that other amps and subs would work just as well. To mount the amp to this bracket, one could probably get by with aggressive mounting tape or even sugru. Instead, I marked, drilled, and countersunk four holes FROM THE BACK OF THE PLATE and epoxied M5 machine screws into place. I mounted the amp and secured from the front with nuts. I have no idea if this will be useful to anyone else... but uploading in case it is useful or provides inspiration for your own design!