Focal BombA 20 A1 Manuel D'utilisation page 4

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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 driver 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
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and size, 8mm (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 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 (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.
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
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.
up on the BombA until you get the required balance.
BombA 20 A1 User Manual