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VIBE MonoBox III Class AB Analogue Amplifier
CONNECTIONS FOR POWER AND SPEAKERS
Figure 2: MonoBox III Rear Panel
1.
Mono Output
2.
2 x 25 Amp Fuses
3.
B12V Input
4.
Remote Turn-on Input
5.
Ground Input
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VIBE MonoBox III Class AB Analogue Amplifier
POST-INSTALLATION
After completing the installation, follow these steps to set the Gain/Crossover Controls and then perform the
Final System Checks.
1.
Turn the Gain Control all the way counter-clockwise (Min)
2.
Turn the vehicle’s ignition switch to the ON position, and then turn the ON/OFF switch on the source
unit(s) to the ON position. Set all Tone or Equalisation controls to “flat” positions, and turn Loudness
off
3.
Play your music source unit and set the Volume Control at 75% of full level. If the system uses an
equaliser, set it’s frequency controls to “flat” positions
4.
Slowly increase the Gain Control. Stop when you hear a slight distortion of audio (beyond this point
the subwoofer driver voice coil is at risk of severe damage not covered by warranty)
SETTING THE CROSSOVER
The VIBE MonoBox III features fully adjustable crossovers, low pass and subsonic.
To set the crossover, follow these steps:
1.
Using the Frequency (Hz) Control, select the desired frequency. Depending on the type of subwoofer
driver and enclosure the low pass filter should be set to achieve perfect integration between
subwoofer output and the rest of the car audio system.
2.
Switching on the subsonic filter will enable a lower frequency limit to be set. The subwoofer output
can often be cleaned up in terms of clarity and definition if the subsonic output from the amplifier is
limited.
SETTING THE BASS ENHANCE PLUS
The VIBE MonoBox III features fully adjustable BASS ENHANCEMENT PLUS, this allows up to a 15dB boost at a
frequency between 30 – 125Hz. This feature can aid in maximising the output of any subwoofer enclosure, it can
be used to boost a poor region of the frequency response or to put emphasis on a chosen frequency area. The Q
of Bass ENHANCE PLUS is approximately fixed at 2.
To set this feature, follow either of these steps:
1.
Apply a large amount of boost and sweep the frequency control, listen carefully to the output of
the subwoofer. Seek out an area of the subwoofer output that is clearly lower than the rest, this
is where this feature can be used to aid response. Back off the boost amount to give a smooth
overall subwoofer response.
2.
Apply a large amount of boost and sweep the frequency control, listen for an increase in output
at a favoured frequency area. Adjust the boost amount to a desired level.
