DB Research Quantum Audio QWX4000/8D4 Installationsanleitung und Benutzerhandbuch - Seite 2

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NTRODUCTION

Congratulations on your purchase of a Quantum Audio state-of-the-art subwoofer

component. Your selection of a Quantum Audio car audio product indicates a true

appreciation of fine musical reproduction. Whether adding to an existing system or

including a Quantum Audio subwoofer in a new system, you are certain to notice

immediate performance benefits.

EEP 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, or visit QuantumAudio.net.

ECOMMENDATION

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 woodwork-

ing as well as the proper tools are required. We highly recommend that you have

your enclosure built by an authorized Quantum Audio retailer. However, if you

decide to install it yourself, we have included the parameters of each driver and

recommended enclosure sizes. If after reviewing the enclosed information you have

any addition questions, please feel free to contact our technical dept.

WARNING!

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.

Due to continuing product improvement, speci cations and design are subject to change without notice.

RODUCT SPECIFICATIONS

QWX4000/8D4

QWX4000/10D4

Fs [Hz]

51.30 Hz

42.76 Hz

Re [Ohm]

3.4 ohm+3.4 ohm

9.87 N/A

9.782 N/A

Cms

106.587 um/N

84.22 um/N

Mms

90.280 g

164.483 g

18.869 mM²

31.416 mM²

Qes

0.478

0.739

Qms

3.122

4.258

Qts

0.415

0.630

Vas

5.389 L

11.803

ALCULATING 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

12 - 1.5 = 10.5

14 - 1.5 = 12.5

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.

QWX4000/12D4

QWX4000/15D4

45.48 Hz

37.904 Hz

3.4 ohm+3.4 ohm

15.007 N/A

10.631 N/A

30.818 um/N

68.080 um/N

397.289 g

258.97 g

49.087 mM²

80.425 mM²

0.857

0.873

4.596

4.648

0.722

0.735

10.545

62.530

Height

Depth

9 - 1.5 = 7.5