BOMBA 27 V1 - Car Speaker FOCAL - Free user manual and instructions
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USER MANUAL BOMBA 27 V1 FOCAL
Congratulations on choosing Focal automobile speakers. To gain the best results from your speakers, please ensure you follow these recommendations, and kek 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^ .
- 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 12 IS RETURNED TO US WITHIN 10 DAYS OF PURCHASE.
C E
Focal® is a trademark of Focal-JMlab® - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - Tel. (+33) 04 77 43 57 00 - Fax (+33) 04 77 43 57 04 - www.focal-fr.com

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 ⑦
(+) The 12V cable must be connected to the battery with a cable of appropriate quality and size, 8mm^2 (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) ①
Connect to the RCA output of the radio.
High-level input ②
Connect to the loudspeaker outputs of the radio.
Never connect the RCA and the high-level inputs together.
Adjusting the Volume ③
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 ③ up on the BombA until you get the required balance.
Bass-boost ④
3 settings:
Classic
- Techno
- Pop
Note that these settings should be used together with the level adjustment.
Phase inverter ⑤
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 ⑥
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 :

$$ A = 1 2 - 3 / 1 6 ^ {\prime \prime} - 3 1 0 m m $$
$$ B = 1 4 - 5 / 8 ^ {\prime \prime} - 3 7 1 m m $$
$$ C = 6 - 1 1 / 1 6 ^ {\prime \prime} - 1 7 0 m m $$
$$ L = 1 8 - 1 / 3 ^ {\prime \prime} - 4 6 6 m m $$
Amplifier setting and connections
- SPL + Extreme Bass + Quality …
Low level inputs (4V compatible)
Integrated Subsonic Filter 24dB/oc

High level inputs for compatibility types of installation
3 bass-boost settings
- Classical
- Techno
- Pop
Adjustable cut-off 40-160Hz at 18d/b/act
Phase settings (0^ / 180^)
Power Protection fuse
Guide
| Issue | Cause | Solution |
| Can’t switch on the BombA | No +12V on the supply | Check connections to battery |
| Ground not properly connected | Check connection | |
| Fuse broken | Change fuse | |
| The BombA is on, but no signal | No signal | Check signal cable |
| No remote | Check power on the remote | |
| Level control ineffective | Turn up the volume on the source. | |
| Output distorted | Source level too high | Turn down the source level |
| Gain of the amplifier too high | Turn down the gain of the amplifier | |
| Fuses blown | Output levels too high | Turn the volume down |
Technical specifications
| BombA 27 V1 | |
| Subwoofer | 27cm (11") |
| Height | 310mm (12-3/16") |
| Base width | 371mm (14-5/8") |
| Lenght | 466mm (18-1/3") |
| Built-in amplifier | 150 Wrms / 300W max. |
| Frequency response | 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.
For the validation of the Focal guarantee, send back this sheet within 10 days to the following address:
Your e-mail address:
Your hobbies:
At home, do you own Hi-Fi loudspeakers?
□-Yes □-No
If yes, specify the brand:
Do you read the press?
□-Yes □-No
If yes, which magazine(s)?
Your audio/video equipment (brands and models) before the acquisition of Focal products:
CD player/tuner:
Multimedia player:
Navigation system:
Amplifier:
Speakers:
Enclosure/subwoofer:
Other elements:
Your choice for the purchase of this Focal model was made according to:
Dealer's advice
-
Friend's or family's advice
-
Visiting an exhibition/a show
-
Quality-price ratio
-
Sound quality/listening room
-
- Already own Focal products
-
Reliability/manufacturing quality
-
Catalogues
-
Design/Finish
-
French product
□ - Article in the press (if yes, specify the title of the magazine)
□-Other:
Your Focal product:
Model:
Serial number:
Dealer's name:
City:
Date of your purchase:
Price of your purchase:
Did you leave the product installation to your dealer's care?
-Yes
If not, why?
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