Manual
w w w . u n i k a . c o m
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
UNiKA
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
INTRODUCTION
Congratulations on purchasing a UNiKA PS Power Amplifier. This state of the art power amplifier includes the latest features and is backed by a three year limited warranty.
Prior to use, we suggest that you carefully read all the instructions.
FEATURES
◆ State of the art technology provides exceptional reliability when working with
difficult speakers with up to 2 ohm impedance.
◆ Excellent handling of low frequencies as well as clear mid and flawless highs.
◆ High output power to drive professional loudspeakers without clipping.
◆ Oversized toroidal transformer, filter and heat sinks for better low end,
transparency and stability.
◆ Comprehensive protection circuitry (short, overheat, DC, subsonic and, RF filters,
turn-on delay) with high current speaker protection relays.
◆ Three modes of operation STEREO. PARALLEL MONO. and MONO BRIDGE,
with mode status indication LEDs on front panel.
◆ Flexible input configuration with active balanced inputs, additional input connec tors to chain amps.
◆ True clip LEDs for better control.
◆ Front-to-Rear airflow with 2 speed fan control.
◆ Efficient aluminum extrusion heat sink design for thermal stability and reliability.
◆ Turn-on in-rush current limiting circuitry.
◆ Compact 3U well balanced enclosure.
◆ Steel reinforced chassis construction for durability and longevity.
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Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
SETUP
Unpack Your Amplifier
Please unpack and inspect your amplifier for any damage that may have occurred
during transit. If damage is found, notify the transportation company immediately.
Only you can initiate a claim for shipping damage. UNiKA will be happy to help as
needed. Save the shipping carton as evidence of damage for the shipper’s inspection.
We also recommend that you save all packing materials so you will have them if you
ever need to transport the unit. Never ship the unit without the factory pack.
YOU WILL NEED (not supplied):
◆ Input wiring cables
◆ Output wiring cables
Rack for mounting amplifier (or a stable surface for stacking)
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Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
3
Install Your Amplifier
CAUTION：
Before you begin, make sure your amplifier is disconnected from the power source,
with power switch in the “off” position and all level controls turned completely down
(counter clockwise).
Use a standard 19-inch (48.3 cm) equipment rack. You may also stack amps without
using a cabinet.
NOTE：
When transporting, amplifiers should be supported at both front and back.
Ensure Proper Cooling
When using an equipment rack, mount units directly on top of each other. Close any
open spaces in rack with blank panels. DO NOT block front or rear air vents. The side
walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier
sides, and the back of the rack should be a minimum of four inches (10.2 cm) from
the amplifier back panel.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
4
CAUTIONS
Read all operating instructions before using this equipment.
To reduce the risk of electrical shock, do not open the unit.
There is NO USER REPLACEABLE PARTS INSIDE. Please contact the UNiKA Service Department or your authorized dealer to speak to a qualified service technician.
Be sure to allow adequate front and rear ventilation to avoid possible heat damage to
you equipment.
Be sure that AC power is OFF and all level controls are set to MINIMUM before making connections. This will eliminate any chance of unexpected, loud audio transients
that could damage your speaker systems.
Be sure that AC power is OFF when changing modes of operation and when changing
the position of the ground lift switch.
DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Operators of electronic
equipment should in no way be in contact with water.
When connecting to AC power line, be sure you haven't lost the ground connection by
using an adapter or extension cord without a 3 prong plug.
Note:
DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY CONTROLS OR
SWITCHES.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
5
CONNECTIONS, CONTROLS AND INDICATORS
Rear Panel
Input section：
There are two parallel input connectors (one female XLR and one male) per channel.
Either can be used as an input or as a link to chain amplifiers.
◆ XLR Input Jacks（1）：
Electronically balanced inputs accept a standard XLR connector.
Pin 1 = shield/ ground, Pin 2 = hot or positive (+) and Pin 3 =cold or negative (-).
◆ Operation Mode Switch（2）：
Switch is used to set the unit for Parallel mode, Stereo mode and Mono Bridge
mode.
◆ Gain switch（3）：
Ps series amplifiers let you select different input sensitivities, respectively three
different voltage gains. The switch settings are 26db voltage gain, 32db voltage
gain and 1.4v input sensitivity,
◆ Limiter switch（4）：
In some applications it may be necessary to switch off the built in peak limiter.
In normal use, with limiters, the distortion is less than 0.5% even when the Clip
LED is flashing.
If the loudspeaker system or a pre connected controller allows the use of an
amplifier with more than 0.5% THD you can switch off the limiter. In this case
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
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you should be aware that the parameter curve at clip level is very steep and you will
have only a small improvement of the usable signal, but a strong increase of distortion.
◆ Ground lift switch（5）：
It’s used to lift the balanced input connectors' ground/shield from the amp lifier's ground. When the signal ground lifted.
The sound source disconnects from the amplifier's ground preventing ground
loops which can generate hum and noise. See the Signal Ground Lift Switch
instructions for more detail.
◆ Speaker Outputs（6）：
Connectors are provided to connect speakers to the amplifier quickly and eas ily. They are high current rated and provide very stable and durable contacts.
A third Speakon connector in the center is provided to be used if the amplifier
is in the Mono Bridge mode. Every Speakon connector has Pin 1+ as positive
and Pin 1- as negative.
Note：
Total speaker impedance must not be lower than 2 ohm pre channel for stereo and
parallel mono modes or 4 ohm for mono bridge mode.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
7
Front Panel
◆ Power Switch（7）：
Turns the unit on and off.
◆ Power LED（8）：
When you have switched on the amplifier channels, the ON LED indicates
the power is being supplied to the channel.
If no of the LED's light up once the appliance has been switched on, this might
be due to the following fault: no power supply from the mains outlet.
Please check that the appliance has been plugged in properly and check that
power is being supplied from the mains outlet. If so, but the LED's still have not
lit up.
◆ Parallel LED（9）：
The parallel LED will light when you have set the rear panel MODE SWITCH
（2）for parallel mono operation. Always make sure that this switch is in the
correct position and that all speaker connections have been made correctly for
the mode of operation you wish to use before powering up the amplifier.
◆ Stereo LED（10）：
The stereo LED will light when you have set the rear panel MODE SWITCH（2）
for stereo operation. Always make sure that this switch is in the correct position
and that all speaker connections have been made correctly for the mode of
operation you wish to use before powering up the amplifier.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
8
◆ Bridge LED（11）：
The bridge LED will light when you have set the rear panel MODE SWITCH
（2）for mono bridge operation. Always mark sure that this switch is in the
correct position and that all speaker connections have been made correctly for
the mode of operation you wish to use before powering up the amplifier.
◆ Signal LED（12）：
The signal LED indicates a -30db point relative to the clipping point, regardless
of the mains voltage and the connected load. This LED gives the user a better
control of the remaining headroom of a channel or a complete system.
◆ Clip LED（13）：
The clip LED indicates the exact clipping point, regardless of the mains voltage
and or the connected load.
The symmetrical supply voltages of the power pack of an amplifier limit its out put power. If amplifier is overdriven by a too high input signal, the output signal
tries to exceed the value of the supply voltage. At this moment, the amplifiers
'clip'. this results in a dangerous situation for the connected loudspeakers. The
peak limiter, if switched on, intervenes here by automatically limiting the output
signal-this is indicated by the clip led of the channel in question.
◆ Level controls（14）：
Establish the input levels required for each channel. only the channel 1 level
control（14）works in mono Bridge mode.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
9
OPERATING INSTRUCTIONS
The amplifier's power must be turned off when changing modes of operation.
Stereo Operation
The unit has two channels for stereo operation. Each channel provides a separate and
discrete signal at the speaker outputs according to the signal received at the input.
The following instructions are for
applications with 8 Ohm, 4 Ohm or
2 Ohm speakers of matched power
rating.
1. With the power off, set the MODE
SWITCH（2）to the STEREO
position. When the power is on,
be sure the Stereo LED on the
front panel. If no, you have the switch in the wrong position. Correct it before contin uing.
2. With the power off, connect your input cables to the channel 1 and channel 2 inputs
using either the female XLR INPUT JACK（1）or male XLR INPUT JACK（1）of
each channel. The other channel 1 & channel 2 input can be used to link to an
additional amplifier.
3. Connect the loudspeakers to the channel 1 and channel 2 SPEAKERS OUTPUT
（6）. THE TOTAL SPEAKER LOAD MUST BE AT LEAST 2 OHM PRE CHANNEL.
If you try to operate at a lower impedance, the amplifier will go into protection mode
and stop operation until you correct the load conditions.
4. With the LEVEL CONTROLS（14）of both channels set to zero（fully counterclo ckwise）, turn the POWER SWITCH（8）on. Apply a signal to the input of the
amplifier. The level of the input signal should be as high as you will ever need in to
be. this way, It will be as high above the amplifier's noise floor as possible, ensuring
an excellent performance and signal to noise ratio. Adjust the LEVEL CONTROLS
for each channel to achieve the desired maximum listening level.
NOTE：
When the clip LED's light, there is distortion, present in the amplifier's output section.
If a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the
input level control for the channel that is clipping or reduce the level at the source.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
10
Parallel Mono Operation
Follow these instructions for parallel Mono
Operation using a single input cable, and
you will have the same monophonic signal
on both the channel 1 and the channel 2
output. Each channel's output is controlled
independently by that channel's level
control.
1. With the power off, set the OPERATION MODE SWITCH（9）to the PARALLEL
MONO position. When the power is on, the PARALLEL MONO LED（3）on the
front panel will light. If the LED does not illuminate, you have the switch in the
wrong position. Correct it before continuing.
2. With the power off, connect your input cables to channel 1 only using the eith er the female XLR INPUT JACK（1）or male XLR INPUT JACK（1）of chan nel 1. The other channel 1 input can be used to link to an additional amplifier.
3. Connect the loudspeakers to the channel 1 and channel 2 SPEAKER OUTPUT（
6）. THE TOTAL SPEAKER LOAD MUST BE AT LEST 2 OHM PER CHANNEL.
If you try to operate a lower impedance, the amplifier will go into protection mode
and stop operation until you correct the load conditions.
4. With the LEVEL CONTROLS（14）set to zero (fully counterclockwise), switch
the power on. Apply a signal to the input. The level of the input signal should be
as high as you will ever need it to be. This way, it will be as high above the amp lifier's noise floor as possible, ensuring an excellent performance and signal
to noise ratio. Adjust the LEVEL CONTROLS for each channel to achieve the
desired maximum listening level.
NOTE：
When the clip LEDs light, there is distortion present in the amplifier's output section.
If a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the
input level control for the channel that is clipping or reduce the level at the source.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
11
Mono Bridge Operation
Follow these instructions to bridge the unit's output. Bridging. the amplifier converts
the unit to a monophonic or single channel. The amplifier can be used with 4 Ohm or
higher loads only in Mono Bridge mode. This mode is used to provide a higher voltage
with greater headroom to your speaker.
Before setting your amplifier for Mono
Bridge operation.
Make sure that your speaker can
handle the high power level provided
by the amplifier in Mono Bridge mode.
CAUTION：
voltage over 100 volts may be produced at the bridge output terminals in this
mode.
1. With the power off, set the OPERATION MODE SWITCH（2）to the BRID GE position. When the power is on, the BRIDGE LED（11）on the front panel
will light. LED does not illuminate, you have the switch in the wrong position.
Correct it before continuing.
2. With the power off, connect your input cables to channel 1 input only using the
either the female XLR INPUT JACK（1）or male XLR INPUT JACK（1）of
channel 1. The other channel 1 input can be used to link to an additional amplifier.
3. Connect the loudspeaker to the BRIDGE SPEAKER OUTPUT（15）only. The
total speaker load must be at least 4 Ohms or above. If you try to operate at
a lower impedance, the amplifier will go into protection mode and stop operation
until you correct the load conditions.
4. With the CHANNEL 1 LEVEL CONTROL（8）set to zero（fully counterclockw ise）, switch the power on. Apply a signal to the input. The level of the input
signal should be as high as you will ever need it to be. This way, it will be as
high above the amplifier's noise floor as possible, ensuring an excellent per formance and signal to noise ratio. Adjust the LEVEL CONTROL （14）for
channel 1 to achieve the desired maximum listening level.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
12
NOTE：
When the clip LEDs light, there is distortion present in the amplifier's output section.
if a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the
input level control for channel 1 or reduce the level at the source. During Mono
Bridge operation, the channel 2 level is inactive, however, both channels LEDs
will flash simultaneously and show output conditions.
USING THE SIGNAL GROUND LIFT SWITCH
Depending on you system configuration, sometimes applying the ground will create
a quieter signal path. Sometimes lifting the ground can eliminate ground loops and
hum to create a quiter signal path.
1. With the power amp on, listen to the system in idle mode (no signal present) with
the ground applied（the SIGNAL GROUND LIFT SWITCH（5）in the left positi on）.
2. Then turn the power off before moving the SIGNAL GROUND LIFT SWITCH（5）
. Lift the ground by moving the SIGNAL GROUND LIFT SWITCH to the right, turn
the power back on and listen to determine which position will provide a signal
devoid of background noise and hum. Keep the SIGNAL GROUND LIFT SWITCH
in the ground position if the noise level remains the same in either position.
CAUTION：
Do not terminate the ac ground on the power amplifier in any way. Termination of the
ac ground can be hazardous.
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
13
TECHNICAL DATA
SPECIFICATIONS PS-3000 PS-4000 PS-5000
Both Channel Driven
8 Ohm
600 W
900 W
1200 W
Both Channel Driven
4 Ohm
980 W
1400 W
1900 W
Both Channel Driven
2 Ohm
1350 W
2000 W
2500 W
Mono Bridge 8 Ohm 1960 W
2800 W
3800 W
Mono Bridge 4 Ohm 2700 W
4000 W
5000 W
Circuitry bipolar, class-H
Frequency Response
20 Hz - 20 kHz +/- 0.5 dB, 1 dB below maximum
performance
Total Harmonic
Distortion
less than 0.01% @ 1 kHz
Input Impedance 20 k Ohm balanced
Operation Mode Parallel-Mono, Stereo and Bridge
Voltage Gain switchable 26 dB , 32 dB or 1.4V
Limiter switchable Peak - Limiter
Ground-Lift ground - lift switch on back panel
Cooling 2 Speed Fan , Front - to - Rear Forced Air
Indicators
LED's for ON, SIGNAL, CLIP, at Both Channel . Parallel,
Stereo and Bridge, for Function Mode
Input Connectors XLR Male / Female
Output Connectors
one 4-pole SPEAKON connector for each output channel
(channel 1 & channel 2),
one 4-pole SPEAKON connector exclusively for Mono
mode
Protection Circuits
Turn - on Delay, Short Circuit, DC, Current Limiter, Over
temperature Protection,
Signal to Noise Ratio < -105 dB
Damping Factor > 800 : 1
Dimensions (WxHxD) 483 x 133 x 464 mm（19", 3U）
Shipping
Dimensions(WxHxD)
615 x 215 x 580 mm
Net Weight 32.5 kg
35.5 kg
37 kg
Shipping Weight 36.5 kg
39.5 kg
41 kg
Manual
PS Series Amplifier
PS-5000 PS-4000 PS-3000
Professional Amplifiers
for Live Sound
w w w . u n i k a . c o m . t w
UNiKA
14
WWW: http://www.unika.com.tw E-Mail: unika@unika.com.tw
Tel : +886 2 2793-3017 Fax: +886 2 2792-8264
6F., No. 168, Xinhu 2nd Rd., Neihu Dist., Taipei City 114, Taiwan (R.O.C.)
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