XXV GEMINI 4 CHANNEL AMPLIFIER APPLICATIONS
8
2 way active, or bi-amplified system with mono bass
2 way active, or bi-amplified system with mono bass, and faded highs/lows
Channels 3 / 4:
This application shows how easily a 2 way active system can be implemented
HI PASS (subsonic): 20 Hz
using a 4 channel amplifier.
Channels 1 and 2 will be used for highs, and channels 3 and 4 for mono bass.
LOW PASS: 100 Hz
Interconnect cable checklist:
Please note that these frequency points are suggestions only. Refer to the
We need to feed the same signal to both sets of channels, so you must use 2
loudspeaker manufacturer specifications and the section
“Setting up systems
after installation for best performance”
Y-adapters, one to feed the LEFT signal to channels 1 and 3, and the right signal
to channels 2 and 4, as shown.
Level control checklist:
Mono bass woofer wiring:
Refer to the section
“Setting up systems after installation for best performance”
Connect the mono speaker positive terminal to the LEFT +, and its negative
terminal to RIGHT -.
Minimum final loudspeaker impedances:
2 Ohms per channel in stereo mode.
CROSSOVER Switch setting checklist:
4 Ohms mono bridged.
1 / 2 CROSSOVER:
HPF
3 / 4 CROSSOVER:
LP/BP
Crossover frequency control checklist:
Channels 1 / 2:
HI PASS: 100 Hz
LOW PASS: N/A
Minimum final loudspeaker impedances:
2 Ohms per channel in stereo mode.
4 Ohms mono bridged.
Interconnect cable checklist:
Here we present a variation of the previous system. Since this is a 2 way
Use good quality RCA leads to connect the inputs of the amplifier to the source
system, we can use the front outputs from a head unit to drive the highs, and the
as shown.
rear output to drive the bass This method allows the listener to easily adjust the
relative levels of bass to highs, with the front to rear fade on the head unit.
Follow the instructions as per the previous system for switch and crossover
Channels 1 and 2 will be used for highs, and channels 3 and 4 for mono bass.
settings.
BASS REMOTE
FULL RANGE
STEREO LINE
INPUTS
BALANCED PHASE CUT/BOOST HIGH PASS
9V 0.2V -10 +10dB 40 400Hz 15 150Hz 40 400Hz LP/BP
LEVEL CUT/BOOST BANDWIDTH FREQ SUBSONIC FREQ CROSSOVER
HFR-G1
REMOTE
CH 1&2
AMPLIFIER
ROUTING
PARAMETRIC EQ
FULL RANGE
FULL RANGE CH1&2
MO ST LP/BP HP
FUSE
PARAMETRIC EQ
X1 X10
9V 0.2V 0 180 0 180 -10 +10dB 40 400Hz
MONO MIX CH1 CH3 INPUT LEVEL LEFT RIGHT 0dB BANDWIDTH FREQ FREQ HP CH3&4
X1 X10
X1 X10
X1 X10
DIAGNOSTICS
AMBER - THERMAL
RED - SHORT CIRCUIT
RED - CLIP
GREEN - PRE-CLIP
AMBER - NEAR CLIP
RED - CLIP
GREEN - PRE-CLIP
AMBER - NEAR CLIP
+12V REM GND
POWER INPUT
+
CH1
-
+
CH2
-
+
CH3
-
+
CH4
-
BRIDGED
SPEAKER OUTPUT
BRIDGED
CH3 & 4
CH3 & 4
CH1 & 2
CH1 & 2
REMOTE TURN-ON
CHASSIS GROUND
TO B 12V VIA FUSE
CH2 CH4
CH4
2CH 4CH
MODE
OUTPUT INPUT
-6dB
-20dB 0dB
CLIP
GREEN: PRE-CLIP
AMBER: SOFT CLIP
RED: HARD CLIP
GREEN: POWER
DIAGNOSTICS
RED: SHORT
AMBER: THERMAL
XXVR-1
BASS REMOTE
LEFT TO
CHANNELS
1 AND 3
RIGHT TO
CHANNELS
2 AND 4
BALANCED PHASE CUT/BOOST HIGH PASS
9V 0.2V -10 +10dB 40 400Hz 15 150Hz 40 400Hz LP/BP
LEVEL CUT/BOOST BANDWIDTH FREQ SUBSONIC FREQ CROSSOVER
HFR-G1
REMOTE
CH 1&2
AMPLIFIER
ROUTING
PARAMETRIC EQ
FULL RANGE
FULL RANGE CH1&2
MO ST LP/BP HP
FUSE
PARAMETRIC EQ
X1 X10
9V 0.2V 0 180 0 180 -10 +10dB 40 400Hz
MONO MIX CH1 CH3 INPUT LEVEL LEFT RIGHT 0dB BANDWIDTH FREQ FREQ HP CH3&4
X1 X10
X1 X10
X1 X10
DIAGNOSTICS
AMBER - THERMAL
RED - SHORT CIRCUIT
RED - CLIP
GREEN - PRE-CLIP
AMBER - NEAR CLIP
RED - CLIP
GREEN - PRE-CLIP
AMBER - NEAR CLIP
+12V REM GND
POWER INPUT
+
CH1
-
+
CH2
-
+
CH3
-
+
CH4
-
BRIDGED
SPEAKER OUTPUT
BRIDGED
CH3 & 4
CH3 & 4
CH1 & 2
CH1 & 2
REMOTE TURN-ON
CHASSIS GROUND
TO B 12V VIA FUSE
CH2 CH4
CH4
2CH 4CH
MODE
OUTPUT INPUT
-6dB
-20dB 0dB
CLIP
GREEN: PRE-CLIP
AMBER: SOFT CLIP
RED: HARD CLIP
GREEN: POWER
DIAGNOSTICS
RED: SHORT
AMBER: THERMAL
XXVR-1
