INSTALLATION BASICS
6
ADJUSTING THE SYSTEM
Once the system is operational, the first thing to do, is set all crossover points to approximate
settings. In the case of the basic sub woofer system Low Pass filter crossover at 100 Hz or so. Set the
Bass Boost equalizer controls to 0 dB ( Flat Switch Position.)
Now you should set the amplifiers Input Sensitivity adjustment. The knob accessible on the side of
the amplifier marked INPUT GAIN adjusts the input sensitivity from 150mV to 5Volts.
To adjust the input sensitivity, turn the control using a small flat 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
amplifier 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 amplifier’s gain separately. Start off with the bass
amplifier, then adjust the highs amplifier’s level control to match.
Once you are satisfied 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 amplifiers level controls.
***
The level control of any car amplifier 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
amplifier. Do not adjust the amplifier 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 first setting
up the system.
USING THE ELECTRONIC CROSSOVER - 4 CHANNEL MODEL
The four channel models feature separate crossovers for channels 1-2 and 3-4. All the
Flash Series amplifiers feature 12dB per octave fully adjustable low-pass and high pass
electronic crossovers. Mono Block bass amps feature 24dB crossovers.
FOUR CHANNEL AMPLIFIER CONFIGURATIONS.
1.
All four channels High Pass for internal component speakers in doors and rear decks.
2.
Channels 1 and 2 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 FREQUENCY will control the low pass frequencies from 30Hz 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 100Hz (the 12 o’clock position).
When using the amplifiers for component speakers or coaxial, you will want to set the
CROSSOVER MODE switch to HIGHt PASS. The FREQUENCY control knob adjusts the
high pass frequencies between 30Hz and 250Hz. Do not attach tweeters directly to the
amplifier even in the high pass mode without a secondary passive crossover to protect
them. 250Hz high pass is not a frequency high enough for tweeters.
SUBSONIC FILTERING
For sub woofer installations with a passive LP crossover, you can set the amplifier’s
CROSSOVER MODE selector to HIGH PASS while setting the FREQUENCY KNOB to 30Hz,
this will act as SUBSONIC FILTER for all signals below 30Hz. This is especially useful for
vented enclosures where the port tuning frequency falls below the sub woofer tuning
frequency to protect against sub woofer unloading.
Содержание Flash F200-2
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