DLS BP-flexi75, BP-flexi 110 Owner's manual

Brand: DLS

Model: BP-flexi75, BP-flexi 110

Type: Owner's manual

THE KIT CONTAINS:

 2 pcs conical flanges (1 large & 1 small) in ABS-plastic

 1 pc black flexible tube.

 1 pc mounting instruction.

DIMENSIONS:

BP-flexi 75

BP-flexi 110

Tube length 410 mm (16,4") 410 mm (16,4")

Mouinting hole 115 mm (4,6") 145 mm (5,8""

Inner diameter 69 mm (2,715") 104 mm(4,095")

Outer diameter 75 mm (2,95") 110 mm (4,33")

Inner tube area 37,39 cm

84,95 cm

(5,79 sq. inch) (13,16 sq. inch)

CALCULATION OF PORT LENGTH:

If you don´t have a computer calculating program you can use

this formula for calculating the port length:

L = 17914 x

x Vb

17914 = constant

L = port length in cm

d = port inner diameter in cm

Vb = net box volume in liter

Fc = box resonant frequency in Hz

NOTE!

The distance from the port opening inside the box, to the wall

behind it, should be at least 1 - 1,5 times the port diameter in order

not to stop the airflow.

When you test the box with music you should be able to feel the

air-flow from the port. At high volumes with a lot of bass, the air-

flow should increase a lot. If the airflow is low the portlength is

wrong, check your calculation and the speaker data again.

It is important that the box is absolutely air-tight, the air should

come out only through the bass-port.

Thank you for buying a DLS BP-flexi bass-port kit. This kit can be

used together with all types of vented speaker boxes where you

need a flexible port. Modern subwoofers are often designed for

small boxes, and small boxes often requires long ports. DLS

flexible ports takes care of this problem. They use the same

conical flanges as BP 75 / 110 but uses a flexible tube. The tube

can be bent and can also be made longer by pulling it. The tube

can be extended from the normal 41 cm up to approx. 54 cm.

INSTALLATION:

DLS BP-75 and BP-110 can be installed easily, no special tools

are required. All that needs is a round hole of the same size as

the outer ring on the large flange in the kit. The bass port can be

mounted from the outside if you wish.

The best result is achieved if the bass port is mounted on the

same side as the speaker element. If there is not room enough to

do so, you can mount it on some other side, but the result may be

worse.

DO LIKE THIS:

Calculate the port length, by hand or in a computer program.

Then cut the tube, 22 mm (7/8") for the BP-110 and 20 mm (3/

4") for the BP-75, shorter than the calculated length when using

conical ports in both ends. This is a compensation for the length of

the flanges. Cut the tube to the calculated length with a sharp

knife or a hack saw as straight as possible.

NOTE! When you bend the tube it becomes longer, a fully bent

tube increases the length about 10%. On a bent tube you must

measure the tube length in the centre of the tube.

Make a round hole in the box where you want to mount the

bass port.

Mounting hole for BP-75 is 115 mm / 4,53"

Mounting hole for BP-110 is 145 mm / 5,7"

The larger flange should be mounted in the box. Fasten it to the

box with screws or glue. There are pre made drill hole markings

on the back of the flange.

The smaller flange is for the inner end of the tube. Use a

PVC-glue to fasten it to the tube.

Then glue the tube to the port mounted in the box.

Since the inner flange is smaller you can also mount it all

together on the outside, and then put it in the box afterwards.

Since the fitting of the details are very good, you can also mount it

together without glue and then make a sound test to see that

everything works alright. When you, after an eventual

readjustment of the port length, are satisfied, glue the pieces

together. Tighten with sealing compound round the flange and in

the joint between the flexible tube and the flange to make it

absolutely airtight.

After bending the tube in the correct position it must be fixed

to the box with some type of mounting loop of metal or wood,

use one or two mounting loops depending on the legth of the

tube. When the installation is ready, and you are satisfied with tthe

sound result, we recommend you to fix the joints of the flexible

tube with a spray glue.

The tube can be bent in any direction inside the box but

there must be a free space behind the port opening of at

least the tube diameter. The tube length can be changed by

pulling it out. You can also make fine adjustments of the tube

diameter by screwing the tube clockwise or counter clockwise.

Don´t screw to much, the tube can brake.

DLS Svenska AB

P.O.Box 13029,

SE-402 51 Göteborg, Sweden

Tel. +46 31 840060

Fax +46 31 844021

E-mail. [email protected]

www.dls.se

DLS BP-flexi75 / BP-flexi 110 bass port kit

DLS BP-flexi gives the following advantages:

 Minimizes the risk for port noise.

 Low loss

 Improved dynamics

 Easy and good looking mounting

 Flexible

 Adjustable in length

If you have any questions about this product, please contact

DLS customer support center on the telephone number below.

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DLS BP-flexi75, BP-flexi 110 Owner's manual

Brand: DLS

Model: BP-flexi75, BP-flexi 110

Type: Owner's manual

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svenska: DLS BP-flexi75, BP-flexi 110 Bruksanvisning

DLS BP-flexi75, BP-flexi 110 Owner's manual

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