16
2-Channel Amplifiers - Speaker & RCA-Connection
QE 450.2 / QE 900.2
2-Channel-Mode: 2 Speakers / Stereo
Cable Connections:
• Connect the AMPLIFIER INPUT SECTION of the amplifier to the head unit line output with good
quality RCA to RCA cables.
• Connect the speakers with the terminal block (SPEAKER L - and + R -) of the amplifier.
• The minimum final speaker impedance must not be below 1 Ohm per channel.
Too low speaker loads result in too high heat dissipation and may cause the amplifier run into protection
status.
• 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.
•
Caution
Please avoid to connect speaker (-) to the ground or vehicle chassis.
FILTER - Switches & Controls
•
If larger than 20 cm speakers are used, the HP FILTER MODE "OFF" position is recommended.
For all smaller speakers (8.7cm - 16cm) the Position FILTER MODE "HP" 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 FILTER FREQ. HP control.
In this operation-mode FREQ. FILTER LP and BASS REMOTE CONTROL is not used. Set LP FILTER MODE to "OFF"
GAIN - Control
• Turn the GAIN control on the amplifier to "MIN." position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the GAIN control clockwise until you hear some distortion.
• Then turn back the GAIN control slightly until you can hear clean sound.
BASS-EQ - Control
• Turn the BASS-EQ control into “0dB” - position.
4 OHM
4 OHM
