6
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
doesn’t go below 5°C.
• 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.
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8
BombA 27 V1 User Manual
ᕇ
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.
ᕈ
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
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9
BombA 27 V1 User Manual
Amplifier setting and connections
SPL
+ +
Extreme Bass
Quality …
+
High level imputs
for compatibility
with all types of installation
Low level inputs
(4V compatible)
ᕄ
ᕆ
ᕃ
ᕅ
3 bass-boost settings
- Classical
- Techno
- Pop
Adjustable level
Adjustable cut-off
40 - 160Hz
at 18dB/oct
ᕈ
ᕉ
Phase settings
(o°/180°)
Power
Protection fuse
ᕇ
Integrated Subsonic Filter 24dB/oct
guide
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
Check signal cable
No remote
Check power on the remote
Turn up the volume on the source.
Level control ineffective
Output distorted
Fuses blown
Source level too high
Gain of the amplifier too high
Turn down the source level
Turn down the gain of the amplifier
Output levels too high
Turn the volume down
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10
BombA 27 V1 User Manual
Tecnical specifications
BombA 27 V1
27cm (11")
Subwoofer
310mm (12-3/16")
371mm (14-5/8")
466mm (18-1/3")
150 Wrms / 300W max.
36Hz-160Hz
Height
Base width
Lenght
Built-in amplifier
Frequency response
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.
®
Focal is a trademark of Focal-JMlab
®
Tél. 00 33 4 77 43 57 00 - Fax 00 33 04 77 37 65 87
Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product. ©Focal-JMlab
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