Indicators And Controls - Jensen DUB 11000D Manuel D'installation

DUB Edition Amplifiers

Indicators and Controls

Power Indicator (POWER)
The power indicator provides a visual indication that the amplifier is turned
on.
Input Level Control (LEVEL)
The input LEV EL control matches the output of your radio to the input of
the amplifier. After the installation is complete, make sure the input level
control on the amplifier is turned down all the way (counter-clockwise or all
the way to the left). Play a tape or CD (make sure bass and treble settings
or B ass EQ are flat) and turn the volume up slowly until you j ust start to
hear distortion. B ack the volume down j ust a bit. On the amplifier, slowly
turn up the input level control (clockwise or to the right) until you j ust start
to hear distortion, then back it down a bit. N ow your radio and amplifier
levels are matched.
BASS EQ
The B ass EQ is continuously adj ustable from 0 to + 12dB @
Adj usting the B ass B oost level allows different subwoofer/ enclosure
combinations to be equaliz ed. Use this control to increase the level of low
bass available from your subwoofer/ enclosure combination. Ported and
B and Pass enclosures should be limited to about + 6 dB to + 9 dB of boost.
Sealed enclosures should be able to accept the full + 12dB of boost, if
necessary. The full + 12dB of boost should be reserved for special
applications since improper use of the B ass B oost could damage your
subwoofers at high volumes.
Low Pass Filter (LPF)
The Low Pass Filte r controls adjust the crossover point. Typical crossover is
between 60Hz and 80Hz for ported and sealed enclosures. Bandpass boxes
will typically use a higher crossover setting between 125Hz and 150Hz. Since
musical tastes vary, you should play music that you would normally listen to in
your vehicle, with the a bove settings as a starting point. If necessary, set the
crossover by ear.
High Pass Filter (HPF)
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Phase Switch
T he Phase Switch is selectable to 0 degrees (normal polarity) and 180
degrees (inverted polarity). Depending on the size and location of your
subwoofer and main speakers, you may need to adjust the Phase
Switch to provide the best blend in the midbass (60 - 150Hz).
To determine the appropriate phase setting, select either regular (0°)
or inverted (180°) and perform a sound test. Listen carefully to the
sound quality while playing a CD with male voices and/or low bass
such as percussion or bass lines, then select the position that
produces the fullest and most dynamic bass. You may need to adjust
the Input Level Control and the Low Pass Filter control after setting
the Phase Switch.
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