page 10
UNiKA
S-4000/S-5000/S-6000
Do Not Use
CH-2 Input
S-4000 Rear Panel
SUBWOOFER MODE :
This mode sends low frequencies to your speakers without the use of an external cross-over. The subwoofer operation can be operated in
stereo, parallel or bridge modes. Change the different operating modes by flipping the mode switch on the rear of the unit to your desired operating mode. Also, set the
subwoofer mode button to the “SUBWOOF” position. Use the frequency selector to adjust the subwoofer output frequency from 20Hz to 200Hz. The different subwoofer
modes are listed as follows:
BRIDGE SUBWOOFER -
This operation allows you to get the most possible power out of your amplifier for the sole purpose of running a high powered subwoofer
loudspeaker in mono. To avoid amplifier overheating, never run the amplifier below 4 ohms in this mode. In this mode you may use the frequency adjustment on the rear
of the amplifier, to control the frequency output level. Frequencies may be adjusted from 20Hz to 200Hz. Page 10 / Figure 17 details a typical Bridge Subwoofer set-up.
STEREO SUBWOOFER -
This operation is similar to the Bridge Subwoofer operation but in stereo. This operation allows you to run several subwoofers down to a
minimum of 2 ohms. To avoid amplifier overheating, never run the amplifier below 2 ohms in this mode. Set up this mode as you would a standard Stereo set-up. Be sure
both channels are set to “SUBWOOF”. In this mode you may use the frequency adjustment on the rear of the amplifier, to control the bass frequency output level.
Frequencies may be adjusted from 20Hz to 200Hz. Page 11 / Figure 18 details a typical Stereo Subwoofer set-up.
PARALLEL SUBWOOFER -
This operation is similar to the Stereo Subwoofer operation but in parallel. When running subwoofers, it is usually recommended to run
them in mono mode to achieve a cleaner tighter low end. This operation allows you to run several subwoofers down to a minimum of 2 ohms. To avoid amplifier
overheating, never run the amplifier below 2 ohms in this mode. Set up this mode as you would a standard Stereo set-up. Be sure both channels are set to “SUBWOOF”
and the mode switch is set to “Parallel”. In this mode you may use the frequency adjustment on the rear of the amplifier, to control the bass frequency output level.
Frequencies may be adjusted from 20Hz to 200Hz.
ONE CHANNEL NORMAL / ONE CHANNEL SUBWOOFER (BI-AMP) -
You may also use your amplifier to bi-amp your system. You may use one side of the amplifier
to power a subwoofer and the other side to power a full range speaker. Follow the set-up guides listed above to mix and match your operations.
Bridge Subwoofer Mode Speaker Set-Up
Figure 17
CH-1 Input
PARALLEL
STEREO
BRIDGE
NORMAL
SUB
Introduction Front Panel Rear Panel Set Up Speakon Assembly
Protection Features Specifications
Operating Modes
BRIDGE
MONO
_
+
+
+
_
CH-1
CH-2
_
PINOUT
1+
1-
POS NEG
CH- 2
PINOUT
2+
2-
POS NEG
CH- 2
1+
2+
POS NEG
BRIDGE
1+
1-
POS NEG
CH- 1
H-2
C
K
C
O
L
H-1
C
K
C
O
L
PARALLEL
STEREO
BRIDGE
THRU
PUSH TO RESET
FREQUENCY
20 Hz
20 Hz
200 Hz
200 Hz
FREQUENCY
CH-2
CH-1
~120VAC 60Hz
THRU
INPUT
GAIN
INPUT
NORMAL
SUB
0.775V
1V
1.44V
NORMAL
SUB
INPUT
Use the two red terminal from the Binding Post to
power a subwoofer speaker in mono-bridge mode.
