DB Drive EUPHORIA EW7 8D4, EUPHORIA EW7 10D2, EUPHORIA EW7 10D4, EUPHORIA EW7 12D2, EUPHORIA EW7 12D4 User Manual
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EUPHORIA : Subwoofers
EW7 8D4
EW7 10D2 / EW7 10D4
EW7 12D2 / EW7 12D4
EW7 15D4
USER MANUAL
32
PRODUCT SPECIFICATIONS
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 # ___ ___ ___ ___ ___ ___ ___ ___ ___ _ _ ___ ___
EW 7 12D2 EW7 12D4 EW7 15D4
Sensitiv ity 1W/1m) SPL 86.402 dB 89 dB 87.93 dB
DC Resista nce Re 1.99 Ω x 2 3.20 Ω x 2 3.20 Ω x 2
Inductance Le 1.128mH 1.272 mH 1.75 mH
Free Air Resonance Fo 28. 356 Hz 31.747 Hz 27.64 Hz
Equivalent St iffeness Vas 71.162 Ltr 68.8 02 Ltr 146.177 Ltr
Mechanical Q Qms 6.673 6.119 4.94
Electrical Q Qes 0.572 0.498 0.765
Total Q Qts 0.527 0.46 0.663
Moving Mass Mms 166.543 g 137.428 g 235.54 g
Motor Force BL 14.389 TM 18.788 TM 18.56 TM
Cone Surf ace Area S d 51.472m sqM 51.472 mM 85.530 mM
Linear E xcursion (1-way) Xmax 10.5mm 11mm 11mm
Mechanical Excursion Xmech 28mm 28mm 28mm
Driver Displacement Disp 0.126 cu ft 0.126 cuft 0.216 cuft
TS Specs
EW7 8D4 EW7 10D2 EW7 10D4
Sensitiv ity 1W/1m) SPL 84.31 dB 85.106 dB 86. 48 dB
DC Resista nce Re 3.20 Ω x 2 2.0 0 Ω x 2 3.20 Ω x 2
Inductance Le 1.113 mH 1.129mH 1.79 mH
Free Air Resonance Fo 9.24 Hz 32.20 Hz 38.19 Hz
Equivalent St iffeness Vas 3.44 Ltr 31.805 Ltr 26.90 Ltr
Mechanical Q Qms 4.04 6.249 5.13
Electrical Q Qes 0.903 0.504 0.51
Total Q Qts 0.738 0.467 0.47
Moving Mass Mms 51.67 g 130.854 g 109.94 g
Motor Force BL 10.96 TM 14.508 TM 18.02 TM
Cone Surf ace Area S d 21.64 mM 34.63m sqM 34.63 mM
Linear E xcursion (1-way) Xmax 7mm 10.5mm 11mm
Mechanical Excursion Xmech 19.5mm 28mm 28mm
Driver Displacement Disp 0.044 cuft 0.086 cuft 0.086 cuft
54
MECHANICAL MEASUREMENTS
EW7 10D2 / EW7 10D4EW7 8D4
6.34 in / 161 mm
5.55 in / 141 mm
10.12 in / 257 mm
5.75 in / 146 mm
9.11 in / 231.5 mm
6.10 in / 155 mm
8.24 in / 209.3 mm
7.14 in / 181.3 mm
4.75 in / 120.6 mm
4.93 in / 125.3 mm
4.23 in / 107.5 mm
4.75 in / 120.8 mm
8.08in / 205.2 mm
7.16in / 182 mm
14.01in / 356 mm
5.75in / 146 mm
7.74in / 196.7 mm
15.27 in / 388 mm
12.18 in / 309.5 mm
6.87 in / 172.3 mm
5.92 in / 150.3 mm
5.75 in / 146 mm
6.49 in / 164.8 mm
11.06 in / 281 mm
EW7 15D4EW7 12D2 / EW7 12D4
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 e nclosure from 3/ 4” thick MDF (medium density fiberboar d).
Make sure the en closure is sealed air tight.
Calculating External Volume
To calculate box volume, measure the out side Width x Height x Dept h of
the enclo sure. Example 12” x 14” x 9”=1512 ÷ 1728” Cubic feet
Nex t you must convert cubic inches into cubic feet. To do this, you must
divid e 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 ar e using by Two (2). Example 3/4” x 2= 1.5“
Nex t subtract 1.5 from each of the outside measur ements of the box.
Width Height Depth
12 - 1.5 = 10.5 14 - 1.5 = 12.5 9 - 1.5 = 7.5
Multiple the new tot als (H x W x D) Example: 10.5 x 12.5 x 7.5 = .5696
Nex t you must convert cubic inches into cubic feet. To do this, you must
divide the cubic inch total by 1728”. Example 9 84.375 ÷ 1728=.5696
cubic feet.
76
RECOMMENDED ENCLOSURES RECOMMENDED ENCLOSURES
Sealed Box Range .54 - .15 cuft
Recomended Sealed Box .54 cuft
Exter nal Box Dimentions 10” W x 10” H x 9” D
Gross Internal Volume .54 cuft
Net Interna l Volume .4 8 cuft
Vented Box Range . 5 - .8 cuft
Recomended Vented Box .63 cuft
Exter nal Box Dimentions 15” W x 10” H x 11” D
Gross Internal Volume .63 cuft
Net Interna l Volume .5 8cuft
Vent dimentions 2 x 8” Diameter
Vent surface a rea 3.14in
2
vent length 8 ”
vent tuning 38Hz
EW7 8D4
EW7 8D4
Sealed Box Range 1.1 - 1.3 cuft
Recomended Sealed Box 1.14 cuft
Exter nal Box Dimentions 16.5 ” W x 13” H x 13” D
Gross Internal Volume 1.14 cuft
Net Interna l Volume 1.07 cuf t
Vented Box Range 1.3 - 1.75 cuft
Recomended Vented Box 1.54 cuft
Exter nal Box Dimentions 20” W x 13” H x 14” D
Gross Internal Volume 1.53 cuf t
Net Interna l Volume 1.35 cuf t
Vent dimentions 4” Diameter
Vent surface a rea 12.57in
2
vent length 15”
vent tuning 39Hz
EW7 10D4 / 10D2
EW7 10D4 / 10D2
9
RECOMMENDED ENCLOSURES RECOMMENDED ENCLOSURES
Sealed Box Range 2.5 - 3.5 cuft
Recomended Sealed Box 2.7 cuft
Exter nal Box Dimentions 21” W x 18” H x 6” D
Gross Internal Volume 2.7 cuft
Net Interna l Volume 2.5 cuft
Vented Box Range 3 - 4 cuft
Recomended Vented Box 3.4 cuf t
Exter nal Box Dimentions 23.5” W x 18” H x 18” D
Gross Internal Volume 3.4 cuft
Net Interna l Volume 3.10 cuft
Vent dimentions 2 x 4” Diameter
Vent surface a rea 25.14 in
2
vent length 12”
vent tuning 36Hz
EW7 15D4
EW7 15D4
Sealed Box Range 1.25 - 1.75 cuft
Recomended Sealed Box 1.5 cuft
Exter nal Box Dimentions 14” H x 19.5” W x 13” D
Gross Internal Volume 1.50 cuft
Net Interna l Volume 1.39 cuf t
Vented Box Range 1.4 - 2 cuft
Recomended Vented Box 1.78 cuft
Exter nal Box Dimentions 22” W x 14” H x 13.5” D
Gross Internal Volume 1.75 cuft
Net Interna l Volume 1.58 cu ft
Vent dimentions 4” Diameter
Vent surface a rea 12.57 in
2
vent length 12”
vent tuning 38Hz
EW7 12D4 / 12D2
EW7 12D4 / 12D2
1110
+
-
+
-
8 Ohm
+
-
+
-
2 Ohm
+
-
+
-
+
-
+
-
4 Ohm
+
-
+
-
+
-
+
-
1 Ohm
+
-
+
-
+
-
+
-
2.6 Ohm
+
-
+
-
+
-
+
-
+
-
+
-
6 Ohm
+
-
+
-
WIRING DIAGRAMS NOTES
12
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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