DB Drive EUPHORIA EW7 8D4, EUPHORIA EW7 10D2, EUPHORIA EW7 10D4, EUPHORIA EW7 12D2, EUPHORIA EW7 12D4 User Manual

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.