Use Your Power Amplifier; Select Filter Mode; Select Lpf Frequency; Adjust Input Level - Philips CMQ205 User Manual

4 Use your power
amplifier

Select filter mode

Select Filter Mode according to the connected
speaker type.
1
Slide FILTER MODE to the selected
position.
HPF (high-pass-filter): Select this
•
mode when mid-range speakers and
tweeters are connected for high
frequency output.
• LPF (low-pass-filter): Select this
mode when woofer and subwoofer
are connected for low frequency
output.
• OFF (flat): Select this mode when
both tweeters and woofers are
connected.

Select LPF frequency

When FILTER MODE is set at LPF position, you
can select the range of frequency that is to be
filtered.
Note
•
When FILTER MODE is set at OFF or HPF
position, LPF FREQUENCY does not work.
1
Slide LPF FREQUENCY to the selected
position.
80Hz: More high frequency signal
•
is filtered. Select 80Hz if you prefer
stronger bass effect.
• 180Hz: Less high frequency signal is
filtered.

Adjust input level

To ensure sound quality, adjust input level to
match it with the car audio's output voltage.
1
Check the line output voltage of the
connected car audio.
2
Rotate INPUT LEVEL to select a matched
voltage: 0.3V to 6V.

Adjust bass boost

To enjoy more bass sound:
1
Set FILTER MODE at OFF or LPF mode.
2
Slide BASS BOOST to 12dB position.
Tip
• BASS BOOST is set at 0dB position, no extra
If
bass will be boosted.
Note
• FILTER MODE is set at HPF mode, the bass
If
frequency will be filtered.
About the protector
indicator
The amplifier has a built-in protection circuit to
protect the transistors and speakers in following
conditions:
• The amplifier is overheated.
• A DC current is generated in
speakers.
• The battery voltage is too low or too
high. Or
• The speaker terminals are short
circuited.
When the PROTECTED indicator
lights up in red, the amplifier shuts
down automatically. In this case
please:
EN 9