BombA 27 V1 User Manual

Congratulations on choosing Focal automobile speakers. To gain the best results from your speakers, please ensure you follow these recommendations, and keek 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 doesnt go below 5C. The location must also be dry and offer adequate ventilation. The supply voltage requirement is 12VDC (13.8VDC) with the negative connection grounded. Please make sure that the characteristics of your vehicle correspond with this requirement before connecting the equipment. For safe driving, we recommend that you operate your sound equipment at a listening level that does not conceal traffic noise.

Warning!

The performance of the Focal BombA 27 V1 allows high sound pressure levels to be generated. We remind you that sustained listening beyond 110dB SPL can permanently and irreversibly damage your hearing. We recommend that you adjust the level 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 11 is returned to us within 10 days of purchase.

Mounting

A power supply kit dedicated to the BombA cabling will shortly be available 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 vehicle and the signal cables down the other. These cables must be suitably protected to avoid any damage to the insulation, especially when feeding the cable through from the engine compartment to the passenger cabin.

Power supply

(+) The 12V cable must be connected to the battery with a cable of appropriate quality and size, 8mm2 (7AWG). Protect the installation with a 30A fuse on this cable fitted less than 40cm (16) away from the battery. (-) The ground wire must be connected to the chassis of your vehicle with a perfect electrical connection (remove some paint to reveal bare metal if necessary) and with a cable of the same specification as used for the + feed. Connect the remote cable 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. Never connect the RCA and the high-level inputs together.

Adjusting the Volume

The volume setting allows you to match the level of the BombA with the level of the front system. Setting: - Turn the gain on the BombA down completely - Turn the radio up to a normal listening level. - Turn the gain up on the BombA until you get the required balance. Bass-boost 3 settings: -Classic - Techno - Pop Note that these settings should be used together with the level adjustment.

Phase inverter

It allows you to phase the subwoofer (generally advised) or unphase it. The right setting is determined by listening and finding the one (matching with the front system) that provides the most bass.
Adjustable cut-off frequency
An electronic crossover removes medium and high frequencies beyond a point set by the user. The ideal is to extend the bass frequencies in an even 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 extensive 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. However, you may prefer a lower cut-off frequency for classical music. It is possible to set the cut-off frequency anywhere between 40 and 160Hz 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 = 12-3/16 - 310mm B = 14-5/8 - 371mm C = 6-11/16 - 170mm L = 18-1/3 - 466mm
Amplifier setting and connections
+ SPL + Extreme Bass + Quality
Low level inputs (4V compatible)
High level imputs for compatibility with all types of installation

Adjustable level

3 bass-boost settings - Classical - Techno - Pop
Adjustable cut-off 40 - 160Hz at 18dB/oct

Phase settings (o/180)

Power Protection fuse
Integrated Subsonic Filter 24dB/oct
Issue Cant switch on the BombA The BombA is on, but no signal Cause No +12V on the supply Ground not properly connected Fuse broken No signal No remote Level control ineffective Output distorted Fuses blown Source level too high Gain of the amplifier too high Output levels too high Solution Check connections to battery Check connection Change fuse Check signal cable Check power on the remote Turn up the volume on the source. Turn down the source level Turn down the gain of the amplifier Turn the volume down

Tecnical specifications

BombA 27 V1 Subwoofer Height Base width Lenght Built-in amplifier Frequency response 27cm (11") 310mm (12-3/16") 371mm (14-5/8") 466mm (18-1/3") 150 Wrms / 300W max. 36Hz-160Hz

Guarantee

All Focal loudspeakers are covered by guarantee drawn up by the official Focal distributor in your country. Your distributor can provide all details concerning the conditions of guarantee. Guarantee cover extends at least to that granted by the legal guarantee in force in the country where the original purchase invoice was issued.
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Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product. Focal-JMlab

MDF vented box, 16mm thick, internal absorbent material More rigidity, less vibrations

BombA 27 V1

Polyglass line
50mm voice coil, 4 layers High power handling
Large NBR surround Excellent reliability
27cm (11") polyglass cone subwoofer Neutral sound without coloration
Streamlined vent hole Less noise of air
Many settings available including:
High and low (4V compatible) level inputs Direct wiring in a speaker output or line output from your car radio Bass-Boost switch, 3 settings (Classic, Techno, Pop) Response curve setting Cut off frequency setting (40-160Hz ; 12dB/oct) Optimization of mid/low coupling
Voice-coil cooling system No dynamic compressions
Exact product details likely to change. Focal-JMlab reserve the right to modify the specication, technology and price of the products without notice. Items may vary from those shown in the photographs. - Focal-JMlab - SCFR050426/1
27cm (11") subwoofer Height: 310mm (12-3/16") Depth: 371mm (14-5/8") Length: 466mm (18-1/3") Max. Power: 300W Nom. Power: 150W Sensitivity (2,8V/1m): 90dB Frequency response: 36Hz-500Hz 300W max. amplifier Phase adjustment (0-180)

It makes the difference

Focal technologies from the beginig of the range. Very good value for money product. Numerous settings, very good complementarity with your audio system.
Focal is a trademark of Focal-JMlab BP 374 - 108, rue de lAvenir - 42353 La Talaudire cedex - Tel. 00 - Fax 87 - www.focal-fr.com