Introduction, Recommendation | DB Drive K7 15D4 instruction

INTRODUCTION

Congratulations on your purchase of a DB Drive state-of-the-art subwoofer compo- nent. 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.

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

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.

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, specications and design are subject to change without notice.

PRODUCT SPECIFICATIONS

	K7 10D4	K7 12D4	K7 15D4
(FS)	30.57Hz	27.80Hz	25.74Hz
(Qts.)	0.36	0.37	0.45
(Qms)	3.47	3.45	4.06
(VAS)	19.63L	42.77L	104.34L
(Xmax)	0.78in	0.78inV	0.78in
(Re)	6.43Ω	6.44Ω	6.43Ω
(Pe)	900/1800	900/1800	900/1800
(QES)	0.40	0.42	0.51
(Sens)	83.30dB	85.30dB	87.33dB

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.

K7 12D4, K7 10D4, K7 15D4, Subwoofer specifications

The DB Drive K7 series subwoofers, specifically the K7 15D4, K7 10D4, and K7 12D4 models, represent a blend of innovative engineering and robust performance that caters to the needs of audiophiles and casual listeners alike. These subwoofers are designed to deliver exceptional sound quality and deep bass, making them a popular choice in the world of car audio systems.

Starting with the K7 15D4, this subwoofer boasts a massive 15-inch cone designed to move significant air and produce the kind of low-frequency impact that can transform an audio experience. Its dual 4-ohm voice coils enable a range of wiring options, allowing users to customize their systems for optimal performance. The K7 15D4 also features a heavy-duty cast aluminum frame that not only enhances durability but also reduces unwanted vibrations that can interfere with sound quality.

Moving on to the K7 12D4, this 12-inch subwoofer offers a balance of size and power. It shares many features with the K7 15D4, such as the dual 4-ohm voice coils and a reinforced cone construction. However, it is particularly well-suited for those looking to conserve space without sacrificing sound quality. The K7 12D4’s ability to handle substantial power ensures a punchy bass performance that can fill any car cabin.

Finally, the K7 10D4 rounds out the series with its compact 10-inch design. This subwoofer is ideal for those with limited space but still desire high-power output. The K7 10D4 features the same robust build quality and innovative design elements found in its larger counterparts. Its efficiency and output capability allow it to enhance any car's audio system, delivering satisfying bass response even in smaller vehicles.

Across the K7 series, innovative technologies such as high-temperature voice coils and advanced cooling mechanisms contribute to enhanced durability and performance. These subwoofers are designed to withstand long listening sessions while maintaining clarity and avoiding distortion. The advanced suspension system also ensures improved linearity, allowing for a wider dynamic range.

In conclusion, the DB Drive K7 series subwoofers—the K7 15D4, K7 12D4, and K7 10D4—are exceptional choices for anyone looking to upgrade their car audio system. With their impressive features, robust designs, and powerful sound capabilities, these subwoofers are sure to satisfy even the most discerning audio enthusiasts.