10. Fan Outlet Ports -
Dual 2-speed cooling fans. Cooling air enters the
amplifier through the front grills and exhausts through the fans. Be
sure not to block these ports when installing the amplifier or other
associated equipment. Air must flow unimpeded through these ports.
11. Channel 1-4 Balanced 1/4" TRS & XLR Input Connectors -
This is
the input terminal of the audio signal that can be connected to the
balanced 1/4” TRS and XLR input plugs.
XLR pin setting: Pin-3/signal negative, Pin-2/signal positive, Pin-
1/ground;
TRS pin setting: TIP/signal positive, RING/signal negative,
SLEEVE/ground
12. Channel 1-4 Output Jack / 5-Way Binding Post -
Connect each
speaker to channel 1-4 output terminal respectively. Red is positive
signal and Black is negative signal.
13. Parallel Input Switch -
Input signal of channels 1 and 2, 2 and 3, or 3
and 4 in parallel mode. When switch “ON”, it's “Parallel Mode” state,
otherwise it's “Stereo Mode” state when switch “OFF”.
14. Mono Bridge Switch -
Input signal of channel 1 and 2 or 3 and 4 in
bridge mode. When switch “ON”, it's “Bridge Mode” state, otherwise
it's “Stereo Mode” state when switch “OFF”.
15. Channel 3 Subwoofer Mode ON/OFF Switch -
This switch will enable
the channel 3 to be a subwoofer channel or bypass the subwoofer
function.
16. Channel 3 Frequency Adj. -
This pot adjust the frequency level from
20Hz to 200Hz sent to your speaker on channel 3 when using your
amplifier in subwoofer mode.
17. Ground Lift Switch -
This switch is used to disconnect the internal
ground signal from the amplifier chassis ground. This may reduce the
buzz that is caused from an electrical 50Hz/60Hz cycle.
18. Breaker -
This breaker is an AC protection circuit from short circuit.
Just press the switch to reset it.
19. AC Power Input -
Plug this cable in to a standard 110 or 220V wall
outlet. Be sure that supplied voltage matches that of the required
voltage of your amplifier. Never plug your amplifier in to a wall outlet
that does not match the required voltage of your amplifier, serious
damage may occur to your unit.
REAR PANEL
page 4
Figure
2
UNiKA
PA-664/PA-1804
CH4 & CH3
CH2 & CH1
CH 4
CH 3
INPUT
PARALLEL
INPUT
PARALLEL
BRIDGE
BRIDGE
CH 1
CH 2
CH-3
_
+
CH-4
_
+
+
+
_
_
BRIDGE
MONO
BRIDGE
MONO
CH-1
_
+
CH-2
_
+
AC IN
BREAKER
RESET
4 CHANNEL INPUT BALANCE
CAUTION
2 OHMS MINIMUM IMPEDANCE PER CHANNEL
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE
GROUND
LIFT
200Hz
20Hz
~120VAC 60Hz
1500 WATTS
FREQUENCY
SUB WOOFER
ON / OFF
CH3 & CH2
PARALLEL
CH 4
CH 3
CH 2
CH 1
15
A
M
P
10
18
10
17
19
15
16
14
13
13
14
13
12
11
Important Precautions Introduction
Front Panel
Set Up Operating Modes Protection Specifications
Rear Panel