Focal BOMBA 20 A1 Bedienungsanleitung

Congratulations on choosing Focal automobile vented box. To gain the best

results from your speaker, please ensure you follow these recommendations, and

keep carefully this user manual so that you can consult it later. If not followed

correctly any fault observed may not be covered by the guarantee.

Precautions

For the subwoofer to perform at its best, we recommend to use it in a location where

temperature doesn’t go below 5°C.

• The location must also be dry and offer adequate entilation.

• The supply oltage requirement is 12VDC (13.8VDC) with the negati e connection

grounded. Please make sure that the characteristics of your ehicle correspond with this

requirement before connecting the equipment.

• For safe dri ing, we recommend that you operate your sound equipment at a listening le el

that does not conceal traffic noise.

arning!

The performance of the Focal BombA 20 A1 allows high sound pressure le els to be generated.

We remind you that sustained listening beyond 110dB SPL can permanently and irre ersibly

damage your hearing. We recommend that you adjust the le el of your equipment

correspondingly.

For safety reasons, it is essential that you securely fix the subwoofer enclosure in the boot

(make sure you do not drill through the petrol tank if you fix it with screws).

Mounting kit included:

- 2 x nylon straps

- 4 x metal roll bar

- 8 x fixing screws

- 1 x template

THE FOCAL GUARANTEE ONLY APPLIES IF PAGE 19 IS

RETURNED TO US ITHIN 10 DAYS OF PURCHASE.

BombA 20 A1 User Manual

Français page 9

Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product.

Focal-JMlab - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - www.focal-fr.com

Tel. (+33) 04 77 43 57 00 - Fax (+33) 04 77 43 57 04

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Mounting

A power supply kit dedicated to the BombA cabling will shortly be a ailable at your supply.

• Unplug the “+” from the battery

• Make sure you follow the car manufacturer instructions (airbag, alarm system, computer,

immobiliser ...).

• Always use battery lead connections.

Cable routing

The 12V supply cables should be passed down one side of the ehicle and the signal

cables down the other. These cables must be suitably protected to a oid any damage to the

insulation, especially when feeding the cable through from the engine compartment to the

passenger cabin.

Installation

We ha e taken time to design a product that will work exceptionally well. To add to this we

ha e included a fixing kit to ensure the subwoofer remains securely mounted. Please follow

the below mentioned steps to ensure the subwoofer is mounted correctly.

1 - Rear seats must be positioned in their normal fixed position.

2 - Decide the best location possible that suits your automobile and space a ailable. We

recommend the best location for optimum sound quality and most secure is to position

behind the rear seats, in the trunk of the automobile. It can be positioned in either left

centre or right side locations. This will not change the sound quality, as bass frequencies

are not directional.

3 - Ensure the area for subwoofer location is clean and tidy. Any loose objects are remo ed, as

they could knock and damage the subwoofer, and this is not co ered by the warranty.

4 - Once the location has been decided, carefully attach the fixing template with scotch tape

(fig. 1).

5 - Now mark the screw hole positions for the fixing brackets. (Please erify with template).

6 - Drill two holes 2 mm for the 4 fixing brackets, at your defined locations. It is ad isable

that the drill depth be reduced to a minimum length, so to pre ent drilling to deep into the

textile of the seat (fig. 2).

7 - Now carefully position the brackets and one screw per bracket into place (fig. 3).

8 - Now take the two fixing straps and thread through the aperture a ailable on the fixing

bracket (fig. 4) and position the second screw on each bracket.

3BombA 20 A1 User Manual

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9 - Now place the subwoofer into position, lay the straps around the grille. These must be

positioned at the extremity of grille, as indicated on diagram, this ensures the straps do not

interfere with the dri er or port tube. Ensure the straps are flat and untangled (fig. 5).

10 - Attach the straps and pull tight (fig. 6).

11 - Ensure the cabinet is securely fastened into position. Adjust straps if necessary to maintain

a secure hold to the rear seat.

12 - Your subwoofer is ready to use.

Power supply 

(+) The 12V cable (BAT) must be connected to the battery with a cable of appropriate quality

and size, 8mm2 (7AWG). Protect the installation with a 15A fuse on this cable fitted less than

40cm (16”) away from the battery.

(-) The ground wire (GND) must be connected to the chassis of your ehicle with a perfect

electrical connection (remo e some paint to re eal bare metal if necessary) and with a cable

of the same specification as used for the + feed.

Connect the remote cable (REM) to the electrical aerial output or to the remote output of

your radio.

Low level input (RCA) 

Connect to the RCA output of the radio

High-level input 

Connect to the loudspeaker outputs of the radio.

Ne er connect the RCA and the high-le el inputs together.

Adjusting the Volume 

The olume setting allows you to match the le el of the BombA with the le el of the front

system. Setting:

- Turn the gain on the BombA down completely

- Turn the radio up to a normal listening le el.

- Turn the gain  up on the BombA until you get the required balance.

Phase inverter 

It allows you to phase the subwoofer (generally ad ised) or unphase it.

The right setting is determined by listening and finding the one (matching with the front

system) that pro ides the most bass.

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Adjustable cut-off frequency 

An electronic crosso er remo es medium and high frequencies beyond a point set by the user.

The ideal is to extend the bass frequencies in an e en and continuous manner from where the

front system rolls off. In general, a cut-off frequency located between 80 and 100Hz should

be suitable for most systems. This setting becomes more critical when the BombA is used

within a high-end hi-fi system.

The idea cut-off frequency will only be found after extensi e listening to a wide range of

musical.

Warning! Very few recordings possess real bass frequencies. Bass notes such as those found

in Rock, Techno, Ragga music etc. are rarely located within the extreme bass area, but more

likely in the high bass band.

As a consequence, it is recommended to select a cut-off frequency between 100 and 120Hz

for these styles of music. Howe er, you may prefer a lower cut-off frequency for classical

music.

It is possible to set the cut-off frequency anywhere between 50 and 200Hz.

This adjustment should be made in reference to the listening position and with your preferred

type of music.

For a more precise adjustment, your retailer may use an analyzer (RTA).

Dimensions :

A = 9-13/16” - 250mm

B = 13-3/8” - 340mm

L = 15-7/16” - 392mm

BombA 20 A1 User Manual

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Amplifier setting and connections

Issue Cause Solution

Can’t switch on the

BombA

No +12V on the supply

Ground not properly connected

Fuse broken

Check connections to battery

Check connection

Change fuse

The BombA is on,

but no signal

No signal

No remote

Level control ineffective

Check signal cable

Check power on the remote

Turn up the volume on the source.

Output distorted Source level too high

Gain of the amplifier too high

Turn down the source level

Turn down the gain of the amplifier

Fuses blown Output levels too high Turn the volume down

Low level inputs

(4V compatible)



High level imputs

for compatibility

with all types of installation



Adjustable cut-off

50 - 200Hz

at 18dB/oct



Adjustable

bass-boost settings

0 - 18dB



Adjustable level



Power protection fuse

and power supply



Phase settings

(o° / 180°)



Guide

Integrated Subsonic Filter 24dB/oct

SPL

Extreme Bass

Quality …

BombA 20 A1 User Manual

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Tecnical specifications

Guarantee

All Focal loudspeakers are co ered by guarantee drawn up by the official Focal distributor in

your country. Your distributor can pro ide all details concerning the conditions of guarantee.

Guarantee co er extends at least to that granted by the legal guarantee in force in the country

where the original purchase in oice was issued.

BombA 20 A1

Subwoofer 20cm (8")

Height 250mm (9-13/16")

Base width 340mm (13-3/8")

Lenght 392mm (15-7/16")

Built-in amplifier 125 Wrms / 250W max.

Frequency response 46Hz-500Hz

BombA 20 A1 User Manual

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Nous vous remercions d’avoir choisi Focal. Afin de tirer le meilleur parti de votre

produit, nous vous recommandons de suivre ces conseils et de conserver cette

notice pour vous y référer ultérieurement. Tout problème dû à un non respect des

règles suivantes pourrait entraîner une non validité de la garantie.

Précautions

Pour un fonctionnement optimal de l’appareil, il est conseillé de l’utiliser à une température

ambiante supérieure à 5°C.

• L’installation doit se faire dans un endroit sec et bien entilé.

• L’alimentation est de type 12 VDC (13,8 VDC) a ec négatif à la masse. Il est recommandé

de s’assurer que les caractéristiques du éhicule sont indiquées pour ce type d’appareil.

• Pour une conduite sans risque, nous ous conseillons un ni eau d’écoute ne cou rant pas

le bruit du trafic en ironnant.

Attention !

Les performances de BombA 20 A1 permettent d’atteindre des ni eaux sonores éle és.

Nous ous rappelons que l’écoute prolongée de musique au-delà de 110dB SPL peut

détériorer durablement os capacités auditi es.

Il est donc conseillé de régler le ni eau de otre équipement en conséquence.

Pour des raisons de sécurité, il est impératif de fixer solidement le caisson dans le coffre

(attention à ne pas percer le réser oir d’essence).

Kit de fixation fourni :

- 2 x sangles nylon

- 4 x arceaux métalliques

- 8 x is de fixation

- 1 x feuille de gabarit

POUR VALIDATION DE LA GARANTIE FOCAL, MERCI DE

NOUS RETOURNER LA PAGE 17 DANS LES 10 JOURS

Focal-JMlab - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - www.focal-fr.com

Tél. (+33) 04 77 43 57 00 - Fax (+33) 04 77 37 65 87

Dans un but d'évolution, Focal-JMlab se réserve le droit de modifier les spécifications techniques de ses produits sans préavis. Images non contractuelles. ©Focal-JMlab

9Notice BombA 20 A1

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