EUPHORIA : EW9
Dual 4 Ω Subwoofer
USER MANUAL
Installation Instructions | Owners Manual
Due to continuous improvement of the product, specifications are subject to change without notice.
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Introduction
Congratulations on your purchase of a DB Drive state-of-the-art subwoofer. 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 your DB Drive subwoofer in a new system, you are
certain to notice immediate performance benefits.
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.
Recommendation
A power subwoofer’s performance is only as good as its installation. Proper installation will max-
imize the system’s overall performance. It is recommended that you have our product installed
by an authorized DB Drive retailer. However, if you decide to install it yourself, please carefully
read through this manual and take your time to do a quality installation.
IMPORTANT!
Before making any connections, disconnect the car’s battery until the installation is
completed to avoid possible damage to the electrical system.
WARNING!
Exposure to high power sound system can cause hearling loss or damange. 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.
S e r i a l # ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ _ ___ __ _ M o d e l # ___ ___ ___ ___ ___ ___ ___ ___ ___ _ _ ___ ___
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PRODUCT SPECIFICATIONS
TS Specs
EW9 12D4 EW9 15D4
Sensitivity 1W/1m) SPL 85.68 dB 87.86 dB
DC Resistance Re 3.20 Ω x 2 3.20 Ω x 2
Inductance Le 2.15 mH 2.59 mH
Free Air Resonance Fo 31.39 Hz 27.39 Hz
Equivalent Stiffeness Vas 39.17 Ltr 116.155 Ltr
Mechanical Q Qms 4.4 6.03
Electrical Q Qes 0.5 0.57
Total Q Qts 0.45 0.52
Moving Mass Mms 246.86 g 310.59 g
Motor Force BL 24.94 TM 24.16 TM
Cone Surface Area Sd 51.47m SqM 85.53m SqM
Linear Excursion (1-way) Xmax 15 mm 15 mm
Mechanical Excursion (Peak-Peak) Xmech 29 mm 30mm
Driver Displacement Disp 0.154 cuft 0.249 cuft
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8.63in / 219.2 mm
7.72in / 196 mm
6.93in / 176 mm
14.01in / 356 mm
8.30in / 210 mm
15.27 in / 388 mm
7.33in / 186.3 mm
6.47in / 164.3 mm
7.04 in / 178.8 mm
6.93in / 176 mm
12.18 in / 309.5 mm
11.06in / 281 mm
MECHANICAL MEASUREMENTS
EW9 15D4
EW9 12D4
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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
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
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
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“
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
Multiple the new totals (H x W x D) Example: 10.5 x 12.5 x 7.5 = .5696
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.
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RECOMMENDED ENCLOSURES
Sealed Box Range 1.75 - 2.5 cuft
Recomended Sealed Box 2.13 cuft
External Box Dimentions 24” W x 14.5” H x 14” D
Gross Internal Volume 2.13 cuft
Net Internal Volume 1.98 cuft
Sealed Box Range 2.75 - 3.75 cuft
Recomended Sealed Box 3.23 cuft
External Box Dimentions 22” W x 18” H x 18” D
Gross Internal Volume 3.23 cuft
Net Internal Volume 3.01 cuft
Vented Box Range 2.5 - 3.5 cuft
Recomended Vented Box 2.95 cuft
External Box Dimentions 28” W x 15” H x 15.75” D
Gross Internal Volume 2.95 cuft
Net Internal Volume 2.6 cuft
Vent dimentions 2 x 4” Diameter
Vent surface area 25.14 in
2
vent length 14”
vent tuning 38Hz
Vented Box Range 3.0 - 4 cuft
Recomended Vented Box 3.5 cuft
External Box Dimentions 24” W x 18” H x 18” D
Gross Internal Volume 3.54 cuft
Net Internal Volume 3.13 cuft
Vent dimentions 2 x 4” Diameter
Vent surface area 25.14 in
2
vent length 13”
vent tuning 35Hz
EW9 12D4
EW9 15D4
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WIRING DIAGRAMS
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8 Ohm
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2 Ohm
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4 Ohm
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1 Ohm
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2.6 Ohm
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6 Ohm
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LIMITED WARRANTY
DB Drive warrants any products purchased in the U.S.A.
from an authorized DB Drive dealer. All products are warranted to be free from
defects in material and workmanship under normal use and service for a peri-
od of one (1) year. This warranty applies to the original purchase only.
DB Drive will either repair or replace (as its option) any unit that has been
found to be defective and under warranty provided the defect occurs within
the one (1) year warranty period.
This limited warranty does not extend to units have been subjected to misuse,
abuse, neglect, or accident. In DB Drive’s judgment, products that show evi-
dence of having been altered, modified, or serviced without DB Drive’s authori-
zation, will be ineligible under this warranty.
To obtain warranty service please contact your retailer or visit our website at
www.dbdrive.net for more details.
302 Hanmore Industrial Parkway Harlingen, TX 78550
Phone (877) 787-0101 : Fax (956) 421-4513 : www.DBDrive.net
™
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