Box Specifications

Fits 1999-2005 BMW 3 Series
Fit Sedan Only
Hole cutout for 8" Sub: 7 1/8"
Hole cutout for 10" Sub: 9 1/8"
Hole cutout for 12" Sub: 11 1/8"
Subwoofer Mounting Depth: 7.50"
Dual Subwoofers Airspace: 0.87 cubic ft. Per Sub/Chamber
Single Subwoofer Airspace: 0.87 cubic ft.
Made with 0.75" MDF
Speaker Wire Terminals: 1 Per Subwoofer
Box Type: Sealed Box
Box Finish - Carpet
Installed Pictures Shown in Light Grey
Subwoofers & Amps Not Included
Hole Cutouts adjustable per request
Dual Subwoofers airspace can be reduced if requested
Single Subwoofers airspace can be changed from .70-1.74 if requested

Box Specifications

Fits 2006-2012 BMW 3 Series
Fit Sedan and Coupe
Hole cutout for 8" Sub: 7 1/8"
Hole cutout for 10" Sub: 9 1/8"
Hole cutout for 12" Sub: 11 1/8"
Subwoofer Mounting Depth: 7.75"
Dual Subwoofers Airspace: 0.93 cubic ft. Per Sub/Chamber
Single Subwoofer Airspace: 0.93 cubic ft.
Made with 0.75" MDF
Speaker Wire Terminals: 1 Per Subwoofer
Box Type: Sealed Box
Box Finish - Carpet
Installed Pictures Shown in Light Grey
Subwoofers & Amps Not Included
Hole Cutouts adjustable per request
Dual Subwoofers airspace can be reduced if requested
Single Subwoofers airspace can be changed from .625-1.87 if requested

Box Specifications

Fits 2006-2012 BMW 3 Series
Fit Sedan and Coupe
This Box Features an area for Amp Placement Under the Box
Hole cutout for 8" Sub: 7 1/8"
Hole cutout for 10" Sub: 9 1/8"
Hole cutout for 12" Sub: 11 1/8"
Subwoofer Mounting Depth: 7.75"
Dual Subwoofers Airspace: 0.93 cubic ft. Per Sub/Chamber
Single Subwoofer Airspace: 0.93 cubic ft.
Made with 0.75" MDF
Speaker Wire Terminals: 1 Per Subwoofer
Box Type: Sealed Box
Box Finish - Carpet
Installed Pictures Shown in Light Grey
Subwoofers & Amps Not Included
Hole Cutouts adjustable per request
Dual Subwoofers airspace can be reduced if requested
Single Subwoofers airspace can be changed from .625-1.87 if requested
Amp mount area under box........Pictures show two different amplifiers under the box. The longer grey amplifier (21" wide) is a lower profile amp and fits completely under the box. The black amplifier is more common with 2.5" of height. Amps with this height will not totally fit under the box (due to the floor angling upward under the box) and will stick out a couple inches but will still provide a great look and place to put your amp.