Crunch GPA1000.1, Instruction Manual, Page: 6 / 14

GPA700.2 / GPA1100.2 / GPA1800.2 2-CHANNEL AMPLIFIER APPLICATIONS
4
Stereo high pass with mono low-pass in a 2 way active, or bi-amplified system
In this application we will use a 2 channel amplifier for the high frequencies, and a second
one for the low frequencies, or mono sub bass. Please consult the speaker specifications
to determine maximum amplifier power requirements.
Connect the inputs of the HIGHS amplifier to a Radio/CD with good quality RCA cables.
Connect the LINE OUT of the HIGHS amplifier to the inputs of the BASS amplifier with a
stereo RCAto RCAcable.
Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to
LEFT -.
switch in the position.
switch in the position.
switch in the position.
switch in the position.
Please note that these frequency points are suggestions only. Refer to the loudspeaker
manufacturer specifications and the section
- Refer to the section
Interconnect cable checklist:
Mono bass woofer wiring:
Switch setting checklist:
- Highs amplifier: X-OVER
HPF
MODE STEREO
- Lows amplifier: X-OVER LPF
MODE MONO
Crossover frequency control checklist:
Highs amplifier:
- HI PASS: 100 Hz
- LOW PASS: N/A
Lows amplifier:
- HI PASS (Subsonic filter): 10 Hz to 40 Hz
- LOW PASS: 80 Hz
Level control checklist:
Minimum final loudspeaker impedances:
- 2-Ohms per channel stereo.
- 4-Ohms mono bridged.
“Setting up systems after installation for best
performance”
“Setting up systems after installation for best performance”
FULL RANGE
STEREO LINE INPUT
STEREO
INTERCONNECT
RCA CABLE
MONO BASS
SPEAKER
REMOTE TURN-ON
REMOTE TURN-ON
CHASSIS GROUND
CHASSIS GROUND
TO B 12 volts VIA FUSE
TO B 12 volts VIA FUSE
FULL RANGE
SPEAKERS