Operation Manual

19
2 Channel Amplifier - Applications
GTS280/GTS2175
L R
Connect RCA cable from
head-unit with RCA input
(LINE LEVEL INPUT).
Subwoofer 4 - 8 Ohms
One 2 Channel Amplifier in Mono/Subwoofer Mode
FILTER SELECT
• In 1 Channel/Mono-Mode select the Lowpass-Position (LOW PASS), which eliminates the higher frequencies.
The recommended crossover frequency ranges between 60 - 100Hz, depending on the size and response of the
Subwoofer. The Lowpass adjustment can be done with the LOW PASS control.
• In this configuration example the HIGH PASS control is not used.
INPUT LEVEL
• Turn the INPUT LEVEL control on the amplifier to 4V position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the INPUT LEVEL control clockwise until you hear some distortion.
• Then turn back the INPUT LEVEL control slightly until you can hear clean sound.
BASS BOOST
• The BASS BOOST - Control increases the bass level at 45 Hz max. +12dB.
Caution! Please use the Bass-Boost carefully. The additional boost may result in clipping or overload.
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Interconnect cable checklist:
• Connect the LINE LEVEL INPUT of the amplifier to the head unit line output with good quality
RCA to RCA cables.
• Connect the speakers with the terminal block (SPEAKERS/ + BRIDGED -) of the amplifier.
• The minimum final speaker impedance must not be below 2 Ohm per channel. Too low speaker
loads result in too high heat dissipation and may cause the amplifier run into protection.
• Please observe speaker channel and polarity as printed by the speaker terminal block.
Incorrect phasing of the speakers results in total loss of bass response.
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Caution
Be careful not to connect speaker (-) to the ground or vehicle chassis.
L RL R
Green: Left Speaker -
White: Left Speaker +
Black: Ground
Brown: Right Speaker +
Gray: Right Speaker -
HI INPUT