XXV GEMINI 4 CHANNEL AMPLIFIER APPLICATIONS
7
4 CHANNEL FULL RANGE SYSTEM
2 or 3 CHANNEL FULL RANGE SYSTEM
Level control checklist:
Here we show how to use the 4 channel amplifiers as straightforward discrete
Refer to the section
“Setting up systems after installation for best performance”
4 channel full range units.
Minimum final loudspeaker impedances:
Interconnect cable checklist:
2 Ohm per channel stereo.
Connect the four inputs of the amplifier to a Radio/CD with good quality RCA
cables.
4 Ohms Bridged.
Crossover Switch setting checklist:
1 / 2 CROSSOVER:
FULL
3 / 4 CROSSOVER:
FULL
Crossover frequency control checklist:
Channels 1 / 2:
HI PASS: N/A
LOW PASS: N/A
Channels 3 / 4:
HI PASS: N/A
LOW PASS: N/A
Channels 3 / 4:
Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel
HI PASS: N/A
units by taking advantage of the mono bridging capability of all HiFonics
amplifiers.
LOW PASS: N/A
The following example shows how to create a 3 channel system by mono
TIP:
If you are using the mono sub bass output of an active crossover, there is
bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow
nothing wrong with switching in the low pass filter in these amplifiers for a
the example to also mono bridge channel pair 1 / 2.
steeper low pass rolloff.
Interconnect cable checklist:
Level control checklist:
Connect the inputs of channel pair 1 / 2 to a suitable stereo source, e.g. a head
Refer to the section
“Setting up systems after installation for best performance”
unit with good quality RCA cables.
A MONO signal source is required to bridge channel pair 3 / 4, such as would be
Minimum final loudspeaker impedances:
available from the mono sub bass output of an active crossover, whether
2 Ohm per channel in stereo mode.
standalone, or built into a head unit or equalizer.
Important:
Do not be tempted
4 Ohms mono bridged.
to connect the hot, or positive outputs, from any source together to obtain a
mono signal, as this could very well damage the output stage of that source.
It is necessary to feed the SAME signal to both left and right inputs via a
Y-adapter RCA cable.
Connect the mono speaker positive terminal to
the LEFT +, and its negative terminal to
RIGHT - as shown.
Crossover Switch setting checklist:
1 / 2 CROSSOVER:
FULL
3 / 4 CROSSOVER:
FULL
Crossover frequency control checklist:
Channels 1 / 2:
HI PASS: N/A
LOW PASS: N/A
FULL RANGE
SPEAKERS
BASS REMOTE
1 STEREO
1 MONO
FULL RANGE
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
REMOTE TURN-ON
CHASSIS GROUND
CHASSIS GROUND
TO B 12V VIA FUSE
TO B 12V VIA FUSE
BASS REMOTE
FULL RANGE
STEREO LINE
INPUTS
Channels 1 & 2
Channels 3 & 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
CH2 CH4
CH4
2CH 4CH
MODE
OUTPUT INPUT
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
-6dB
-20dB 0dB
CLIP
GREEN: PRE-CLIP
AMBER: SOFT CLIP
RED: HARD CLIP
GREEN: POWER
DIAGNOSTICS
RED: SHORT
AMBER: THERMAL
XXVR-1
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
