OWNER’S MANUAL
Control Panel Functions
1. Audio Input
- A source unit that supplies a “line level” (pre amp) audio output in the
form of RCA phono plugs is required to connect here (via a phono extension lead). A high
quality shielded lead is recommended as this will help reduce the possibility of noise
entering the system.
2. Gain Control
- Turning the knob to the right (clockwise) will increase the volume, and
to the left (anti-clockwise) will reduce the volume.
It is important to understand that
the amount of gain needed is proportional to the level of the signal coming from the
source unit. For example, it is possible for the gain knob to be at only a quarter of its
maximum, but the amplifier is actually outputting to its full potential. This could be
because the source unit is supplying slightly more power than normally expected.
Please see “Installation” section for how to calibrate the amplifier to the output of the
source unit using the gain knob.
3. Normal/Subwoofer Switch
- When powering a subwoofer, it is advisable to switch to
subwoofer mode. The amplifier employs a low-pass filter which cuts out the frequencies
other than bass. This enables the subwoofer to function more efficiently.
4. Bass Control
- This knob controls the level of the bass. Turn to the right (clockwise) to
increase the bass volume, or turn to the left (anti-clockwise) to decrease the bass volume.
5. Treble Control
- This knob controls the level of the treble (the high frequencies). Turn
to the right (clockwise) to increase the treble volume, or turn to the left (anti-clockwise) to
decrease the treble volume. This can be used in conjunction with the bass control to tailor
the output to the surroundings of the car, or listening preference.
If more than one amplifier is used, one could be used to reproduce the bass frequencies
through a subwoofer and the other one used to play only treble through midrange
speakers or tweeters.
The control panel for the TL-1092 is as follows:
OWNER’S MANUAL
6. Protection Indicator
- This LED will light if the amplifier has detected a fault and has
shut down to protect itself from permanent damage. This will be due to one of the
following: excessive heat, DC offset, short circuit or input overload. If this happens
disconnect the amplifier and investigate the problem.
7. Power Indicator
- This LED will light when power, remote and earth are all connected
to the amplifier. If this LED is not on, there is a problem with one of these connections.
8. Speaker Connections
- These are screw terminals for attaching the speaker cables.
Undo the screw head enough to slot a stripped end of speaker cable into the terminal, and
then tighten the screw. Please see wiring diagrams in the “Installation” section for how to
connect speakers to the amplifier.
9. Power Fuse
- This ATC fuse is to protect the amplifier against overdrive. In the event
that the fuse blows, it would be advisable to replace it with one of the same value.
An additional fuse is required between the battery and the amplifier. This comes as
standard in amplifier wiring kits.
10. Power Connections
– This is where all the power leads are connected to the
amplifier. Particular care must be taken when connecting, NOT to cross any of the cables.
“B+12” is the positive connection from the battery. “GND” is the negative or earth
connection and “REM” is the remote or ignition connection.
Mounting Instructions
Before mounting, please read the “Installation” section. The best place to mount the
amplifier is somewhere where it will not get damaged by the feet of passengers or by
items in the boot of the vehicle. The amplifier dissipates heat using its heat sink;
somewhere with sufficient space and air would be fine. Therefore placing the amplifier in
between items, placing items on top of it, or mounting it upside down is not advisable.
Examples of surfaces are: the floor of the boot, fake floor of boot (MDF), side of subwoofer
box, side of boot, high in the passenger footwell or under a front seat. Never mount the
amplifier outside of the car, in the engine bay or anywhere where it has a risk of getting
wet. Normally it is best to attach the amplifier to a board, and then attach the board to
the car body. This is good practice to avoid noise problems.
Before mounting, make sure that the surface is suitable and free from any obstructions.
Use the amplifier as a template and mark where the holes are to be drilled with a pencil or
pen. Drill the pilot holes with a drill bit of diameter smaller than that of the screws.
Then place the amplifier on the surface and tighten the screws (as illustrated below) until
they are holding the amplifier securely in place.
