
Sealed enclosures oer a range of performance 
profi les depending on the internal air volume. 
Larger enclosures will have a smoother more 
extended response while a small enclosure 
will have increased output in a more focused 
frequency range. Sealed enclosures are the 
simplest to construct but do require that the box 
•  Make sure the woofer mounting panel is 
•  Glue all mating surfaces
•  Use silicone caulk on all internal joints
The internal volume of the 
enclosure must be determined 
to insure proper performance. 
Simply measure height, width and 
depth of enclosure you intend 
to build. Subtract the material 
thickness. Multiply these numbers 
and divide by 1728 to get the 
For enclosures with an angled 
panel, measure the larger and 
smaller depths, add these 
together and divide by two. Use 
Always consider consulting a professional audio installer 
before installing new subwoofers. High power audio 
systems have the ability create sound levels above 130dB. 
Extended exposure to high sound pressure levels can 
Always run any new wiring through safe areas that wont 
interfere with the normal operation of the vehicle.
Congratulations on your choice of a MBQuart subwoofer. 
This “Quick Start Installation” guide is meant to help you 
“hook up” and play music. For more detailed information 
on system setting, speaker and subwoofer confi guration, 
and full specifi cations by model, visit the website at
It’s a good idea to confi rm that you have purchased the 
correct size subwoofers to fi t your vehicle. If you have any 
reservations about being able to complete the installation 
yourself, we recommend contacting a professional. Be careful 
as you go. Always disconnect the negative battery terminal 
before starting any electrical work on the vehicle.
8.43”(214) 2.77”(70) 7.17”(182) 0.57”(14.4)
10.31”(262) 2.93”(74) 9.06”(230) 0.67”(17)
12.28”(312) 3.00”(76) 10.59”(269) 0.96”(24)
Vented designs are NOT recommended. This 
subwoofer is designed to perform in small