INTRODUCTION
Congratulations on your purchase of a DB Drive state-of-the-art
subwoofer component. Your selection of a DB Drive car audio product indicates a
true appreciation of fine musical reproduction. Whether adding to an existing
system or including a DB Drive subwoofer in a new system, you are certain to
notice immediate performance benefits.
PRODUCT SPECIFICATIONS
KEEP YOUR SALES RECEIPT
Take this time to attach your sales receipt to the manual and put in a safe place. In
case of any unforeseen reason this product may need warranty service, your receipt
will be necessary to establish purchase date. For detailed warranty information
please refer to enclosed warranty card.
RECOMMENDATION
WARNING!
A speaker’s performance is only as good as it’s enclosure. Proper installation,
enclosure size and crossover frequency will maximize the overall performance of
the subwoofer. To properly design and build an enclosure, knowledge of wood-
working as well as the proper tools are required. We highly recommend that you
have your enclosure built by an authorized DB Drive retailer. However, if you decide
to install it yourself, we have included the parameters of each driver and recom-
mended enclosure sizes. If after reviewing the enclosed information you have any
addition questions, please feel free to contact our technical dept.
CALCULATING ENCLOSURES
It is difficult to give exact box dimensions that are universal for all cars and trucks.
It is for this reason that you must be able to calculate the space in which you have
available in order to achieve the proper air volume required.
It is recommended to build your enclosure from 3/ 4” thick MDF (medium density
fiberboard). Make sure the enclosure is sealed airtight.
Calculating External Volume
1.) To calculate box volume, measure the outside Width x Height x Depth of
the enclosure. Example 12” x 14” x 9”=1512 ÷ 1728” Cubic feet
2.) Next you must convert cubic inches into cubic feet. To do this, you must
divide the cubic inches total by 1728”. Example 1512 ÷ 1828=.875 Cubic feet
Calculating Internal Volume
1.) To calculate the internal (net) volume of the above box you must first multiply
the thickness of the wood you are using by Two(2). Example 3/4” x 2= 1.5“
2.) Next subtract 1.5 from each of the outside measurements of the box.
Width Height Depth
12 - 1.5 = 10.5 14 - 1.5 = 12.5 9 - 1.5 = 7.5
3.) Multiple the new totals (H x W x D) Example: 10.5 x 12.5 x 7.5 = .5696
4.) Next you must convert cubic inches into cubic feet. To do this, you must
divide the cubic inch total by 1728”. Example 984.375 ÷ 1728=.5696
cubic feet.
Exposure to high pressure levels can cause hearing loss or
damage. Listening to your system at loud levels while driving, will
impair your ability to hear traffic sounds and emergency vehicles.
Use common sense when listening to your system.
While installing your subwoofer enclosure in the vehicle. Securely
fasten it to the frame or floorpan. If the enclosure is not secured
properly, there is danger of it becoming a projectile in a collision.
(FS)
(Qts.)
(Qms)
(VAS)
(Xmax)
(Re)
(Pe)
(QES)
(Sens)
27.52Hz
0.45
4.38
37.73L
0.98in
6.43Ω
1000/2000
0.50
83.85dB
K9 12D4
25.50Hz
0.38
4.45
40.57L
0.98in
3.83Ω
1000/2000
0.42
83.95dB
K9 12D2
24.31Hz
0.50
4.52
90.98L
0.98in
6.46Ω
1000/2000
0.56
85.55dB
K9 15D4
24.07Hz
0.45
4.61
81.10L
0.98in
3.83Ω
1000/2000
0.50
85.43dB
K9 15D2
30.29Hz
0.43
4.57
14.44L
0.98in
6.43Ω
1000/2000
0.47
81.13dB
K9 10D4
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