User Guide

7
Settings
Adjusting The System
Once the system is operational, the rst thing to do, is set all crossover points to approximate settings. In the case of the basic sub woofer system Low Pass lter crossover at 100Hz or
so. Set the bass equalizer controls to 0 dB.
Now you should set the ampliers Input Sensitivity adjustment. The knob accessible on the side of the amplier marked LEVEL or INPUT LEVEL adjusts the input sensitivity. To adjust
the input sensitivity, turn the control using a small at head screwdriver fully counter clock wise to the minimum position. Do not apply any pressure while turning as this might break the
control unit. Adjust your radio volume level to maximum volume. Now turn the level control on the amplier clockwise towards the Maximum marking until audible distortion occurs. When
you begin to hear any distortion in the sound, back down one notch and your amp is set. It is helpful to have a second person to help you set the gain.
When setting up a multi-amp system, set each amplier’s gain separately. Start off with the bass amplier, then adjust the highs amplier’s level control to match.
Once you are satised with the level control settings, use any equalizer controls to adjust the system tonal level for personal preference. Keep in mind that after equalizing, you may have
to go back and reset the amplier’s level controls.
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The level control of any car amplier should not be mistaken for a volume control. It is a sophisticated device designed to match the output level of your source unit to the input level of
the amplier. Do not adjust the amplier gain to maximum unless your input level requires it.
If your unit has been professionally installed please do not change the gain settings set by the installer, he is the professional!
Your system can also be extremely sensitive to noise when the LEVEL is set to maximum and does not match your input signal. The gain adjustments need to be made only once when
rst setting up the system.
Using The Electronic Crossover - 4 Channel Models
The four and ve channel models feature separate crossovers for channels 1-2 and 3-4. All the dB Series ampliers feature 12dB per octave fully adjustable low-pass and high pass
electronic crossovers.
Four Channel Amplifier Configurations
1. All four channels on High Pass for internal component speakers in doors and rear decks.
2. Channels 1 and 2 on High Pass for front component speakers, while channels 3 and 4 are wired to sub woofers.
3. Bridge channels 1 and 2 for single high power sub woofer channel. Bridge channels 3 and 4 for second high power sub woofer channel.
For Low Pass systems, set the CROSSOVER MODE switch to LOW PASS. Now the knob marked LPF will control the low pass frequencies from 50Hz to 250Hz. A frequent mistake made
is setting the low pass frequency too low, especially when using vented sub woofer enclosures. We recommend that for most installations you do not set the frequency knob lower than