Operation Manual

18
Speakers (Right) 2 - 8 Ohms
Speakers (Left) 2 - 8 Ohms
Connect RCA cable from
head-unit with RCA input
(LINE LEVEL INPUT).
L R
2 Channel Amplifier - Applications
GTS280/GTS2175
One 2 Channel Amplifier in Stereo Mode
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/ + L - and + R -) 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.
FILTER SELECT
• If larger than 20 cm speakers are used, the FLAT position is recommended.
• For all smaller speakers (Ø8.7cm - Ø16cm) the Highpass-Position (HIGH PASS) is recommended, which eliminates the
lowest frequencies and protects the speakers from damage. Set the crossover-frequency between 60Hz - 150Hz,
depending of the size of the installed speakers. The Highpass adjustment can be done with the HIGH PASS control.
• In this configuration example the LOW 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
• Turn the BASS BOOST control into “0dB” - position.
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L RL R
Green: Left Speaker -
White: Left Speaker +
Black: Ground
Brown: Right Speaker +
Gray: Right Speaker -
HI INPUT