AMPLIFIER
TD-14000
User Instructions
This booklet contains important information concerning the proper and safe operation of your new amplifier..
Made in Taiwan
Index
01 Precautions
02 Introduction
03 Front Panel
04 Rear Panel
05 Operation and Performance
POW ER
TD-14000
UNiKA
P R O F E S S I O N A L A U D I O
UN iKA
P R O F E S S I O N A L A U D I O
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To reduce the risk of electrical
shock, do not remove the cover (or
back). No user serviceable parts
inside; refer servicing to qualified
personnel.
WARNING: To reduce the risk of fire or
electrical shock, do not expose this
appliance to rain or moisture.
This symbol, wherever it
appears, alerts you to the
presence of uninsulated
dangerous voltage inside the
enclosure - voltage that may be
sufficient to constitute a risk of
shock.
This symbol, wherever it
appears, alerts you to
important operating and
maintenance instructions in the
accompanying literature. Read
the manual.
!
!
Important Precautions
To reduce the risk of electrical shock or f ire, do not expose this unit rain or
moisture.
Make sure that the AC Mains voltage is correct and matches the voltage painted
on the rear panel of the amplifier (110 V or 220V)
Do not spill water or other liquids into or on to your unit.
Do not attempt to operate this unit if the power cord has been frayed or broken.
Do not attempt to remove or break off the ground prong from the electrical cord.
This prong is used to reduce the risk of electrical shock and f re in case of an
internal short.
Disconnect main power before making any type of connection.
Do not remove the cover under any conditions. There are no user serviceable
parts inside.
Never plug this unit in to a dimmer pack.
Always be sure to mount this unit in an area that will allow proper ventilation. Allow
about 6” (15cm) between this device and a wall.
Do not attempt to operate this unit, if it becomes damaged.
This unit is intended for indoor use only, use of this product outdoors voids all
warranties.
During long periods of non-use, disconnect the unit’s main power.
1
During long periods of non-use, disconnect the unit’s main power.
Always mount this unit in a safe and stable manner.
Power cords should be routed so they are not likely to be walked on, pinched by
items placed upon or against them.
Cleaning -The outside of the unit should be wipe down with a soft cloth and mild
cleaner when needed.
Heat -The amplifier should be situated away from heat sources such as radiators,
heat registers, stoves, or other appliances (including amplifiers) that produce heat.
The fixture should be serviced by qualified service personnel when:
A. The power-supply cord or the plug has been damaged.
B. Objects have fallen, or liquid has been spilled into the unit.
C. The appliance has been exposed to rain or water.
D. The fixture does not appear to operate normally or exhibits a marked change in
performance.
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
Introduction
Congratulations and thank you for purchasing TD14000 amplifier. This amplifier is a
representation of UNiKA’s continuing commitment to produce the best and highest quality
audio products at an affordable price. These amplifiers are designed to provide a big
impact in sound reproduction. Please read and understand this manual completely
before attempting to operate your new amplifier. This booklet contains important
information concerning the proper and safe operation of your new amplifier.
Unpacking: Every TD14000 amplifier has been thoroughly tested and has
been shipped in perfect operating condition. Carefully check the shipping carton
for damage that may have occurred during shipping. If the carton appears to be
damaged, carefully inspect your unit for any damage and be sure all accessories
necessary to operate the system have arrived intact. In the event damage has
been found or parts are missing, please contact your dealer for further
instructions.
Installation: This amplifier is designed to mount into a standard 19”rack. The
front panel provides four holes used to screw the unit into a rack. The unit also
provides a way to rear mount the unit into a rack for added security. Rear mounting
the unit is especially recommended if the unit is to mounted into a mobile rack.
2
3
Precautions Introduction Rear Panel Operation and PerformanceFront Panel
Front Panel Control
Figure 1
POW ER
2 2 1
3 4 56 6 7
1
1. Carry/protection handle - Both handles can be used to carry the amplifier, they also
act as protection for the front panel.
2. Input level attenuators - These controls are used to alter the signal level entering the
amplifier. They are calibrated in dB to help set up active loudspeaker systems or cut
down unwanted noise from the input signal.
3. Over temperature protect indicator - This indicator lights if the amplifier tries to
operate above its maximum operating temperature (90oC). The indicator first comes
on as a warning to either turn down the input level or check the cooling arrangements
after which point the amplifier will mute the input signal. When the cooling fans have
returned the output heat sinks to the normal operating temperature the input signal is
unmuted.
4. VHF protect indicator - This indicator lights when constant signals, above 12 kHz at
full power, are present at the output terminals. When this happens the input signal is
muted and the process cycles until the VHF signal is no longer present.
5. Clip/limit indicator - This indicator tells when the amplifier output is clipping or
limiting. The two different states can be told apart:
When the clip limiter is engaged it flickers briefly.
When the clip limiter is not engaged it lights for a longer period.
6. Fan grill filter - A foam filter is located behind the front panel to prevent dust entering
the amplifier.
7. Power switch - This is used to start the amplifier.
AMPLIFIER
TD-14000
TD-14000
UN iKA
P R O F E S S I O N A L A U D I O
Precautions Introduction Front Panel Operation and PerformanceRear Panel
ON DIP ON DIP
1 2 3 4 5 6 1 2 3 4 5 6 7 8
PUSH PUSH
~110V 6 0Hz
~220 V 60Hz
21 3 4
Figure 2
PUSH PUSH
Audio inputs and loop-thru
connectors-tow-channel models
Binding Posts-two-channel
models
1. AC line cord - Mains input 115V or 220V
operation (Not selectable
2. The DIP - switch features - The following
features may be adjusted using the DIPswitches on the rear panel of the amplifier.
Gain - Globally setfor all channels, from
+23dB to +44dB in 3dB steps.
Option active - Not currently
implemented.
Fan Masked - When on, engages the
intelligent fan feature; fan speed is
Rear Panel Control
ON DIP ON DIP
1 2 3 4 5 6 1 2 3 4 5 6 7 8
4. Output connectors - TD14000 offered with Binding Post connectors for speaker outpu
connection.
Bridge A+B - Switches the channel pairs into bridge mode operation An automatic -6dB
gain compensation is applied.
VPL - The Voltage Peak Limiter provides optimum peak voltage settings for each channel.
Level selections vary by model within the TD14000 amplifier.
Mode - Select VPL mode to either Hard or Soft operation. For channels driving sub-woofers
and low-frequency drivers, it is recommended to use the Hard setting for optimal operation.
For mid-and-high-frequency drivers, always select Soft.
3. Input connectors - This
amplifier is equipped with XLR-F
input connector, two-channel
models also offer parallel(”loopthru”) XLR-M output connectors
for daisy-chaining multiple
amplifiers from the same signal
source
lowered when no signal is present.
4
AMPLIFIER
TD-14000
5
Precautions Introduction Front Panel Rear Panel Operation and Performance
Operation and Performance
Signal flow blocks
All TD14000 amplifiers have the same signal flow, and the same feature sets. The only
internal differences are in the maximum output current per channel and VPL settings.
The input stage of all Td14000 amplifiers has a high sensitivity to provide ample system
headroom. This in effect means that the input stage is almost impossible to clip.
Overall amplifier input gain is adjusted using the input stage DIP-switches. Please note
that the gain setting is global, affecting all channels. Following the input stage, the
dedicated level control on each channel allows signal attenuation from 0 dB to minus.
The Current Peak Limiter(CPL)section dynamically limits the input signal based on three
parameters: sensed current level, feedback from the output stage, and sensed voltage
clip from the VPL (and output amplifier voltage clip if “Soft Clip” is activated). This
ensures that power output is maintained within the design limits of the amplifier.
The adjustable Voltage Peak Limiter(VPL) sets the maximum output voltage and
therefore also the maximum output power. Eight different voltage stages are available
using the DIP-switches on the rear panel.
The sophisticated output section monitors faults and generates appropriate warnings,
which are displayed on the amplifier front panel These alerts allow the operator to adjust
system settings and thereby avoid problems. In the rare event that condition are
extraordinarily severe, the amplifier will shut down until the fault or problem setting ha
been rectified or adjusted. These sensing circuits level information, via a side chain, to
the limiters. Sensing circuit also transmit local amplifier module temperature and power
supply temperature to the appropriate protection mechanisms. Read the Protection,
Faults and Warnings section for further details.
Figure 3
TD14000 signal flow
Gain select switches Front panel
potentiometer
Dynamic Gain
reduction
VPL select switches
Class TD
Hard/Soft switch
Voltage Clip sensing
Current clip sensing
Control Mute
Monitoring Level
Temperature
Fault/Warning
Input Amplifier Level control Clip Limiter Voltage Peak Limiter Output Power Amplifier
AMPLIFIER
TD-14000
6
Headroom, ensitivity and VPL/Gain settings.
NOTE
NOTE
The input amplifier and limiter system I designed to accommodate extreme of
performance. Typically, exceeding maximum input by much as +10dB will only result in a
1% increase in distortion. The following schematics illustrate how the adjustable VPL and
Gain circuitry affect input sensitivity and output power.
The tables to the left of the figure 4 in page5 show input sensitivity foraTD14000with a 2
ohm load and 195Vpeak(max.) and 54 V peak(Min.) respectively for the eight different gain
stages between +23 dB and +44 dB. The resulting output power is displayed in dBu, Vrms
and watts in the tables to the far right.
The headroom available through the input stage to the clip limiter is shown by the dotted
lines as +10 dB at 195 V peak and +16.1 dB at54 V peak. These lines illustrate the
additional signal level that can be accepted at the input before any significant distortion will
appear at the input stage.
If you use the level potentiometer in the signal chain to reduce the level by an
amount greater than the headroom relative to input sensitivity AND you drive
the amplifier to clip level, you in danger of clipping the input stage before the
current or voltage peak limiter are activated.
When bridging two channels, you must add +6 dB to the input sensitivity to
achieve maximum output voltage due to the automatic -6 dB gain compensation
inserted by the amplifier.
Gain select switches Front panel
potentiometer
Dynamic Gain
reduction
VPL select switches
Class TD
Hard/Soft switch
Voltage Clip sensing
Current clip sensing
Control Mute
Monitoring Level
Temperature
Fault/Warning
Input Amplifier Level control Clip Limiter Voltage Peak Limiter Output Power Amplifier
VPL set to 195 VPEAK
Input
sensitivity
dBu / Vrms
1,0 / 0,87
4,1 / 1,23
7,0 / 1,7
10,0 / 2,5
13,0 / 3,5
16,0 /4,9
19,0 /6,9
22,0 / 9,8
Gain set to:
(DIP-switches)
+44 dB
+41 dB
+38 dB
+35 dB
+32 dB
+29 dB
+26 dB
+23 dB
+10 dB headroom to clip
relative to input sensitivity *)
VPL set to 54 VPEAK
Input
sensitivity
dBu / Vrms
-10,1 / 0,24
-7,1 / 0,34
-4,1 / 0,5
-1,1 / 0,7
1,9 / 1,0
4,9 /1,4
7,9 /1,9
10,9 / 2,7
Gain set to:
(DIP-switches)
+44 dB
+41 dB
+38 dB
+35 dB
+32 dB
+29 dB
+26 dB
+23 dB
+16,1 dB headroom to clip
relative to input sensitivity *)
Voltage Peak
Limiter set to:
(DIP-switches)
Complete tables for all CPL
settings can be found at:
www.labgruppen.com
195 V peak
170 V peak
140 V peak
116 V peak
100 V peak
80 V peak
66 V peak
54 V peak
Voltage Peak
Limiter set to:
(DIP-switches)
195 V peak
170 V peak
140 V peak
116 V peak
100 V peak
80 V peak
66 V peak
54 V peak
Voltage Peak
Limiter set to:
(DIP-switches)
195 V peak
170 V peak
140 V peak
116 V peak
100 V peak
80 V peak
66 V peak
54 V peak
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
7
Precautions Introduction Front Panel Rear Panel Operation and Performance
Audio Input and Output connections
Balanced Input connections
PUSH PUSH
Figure 5
Audio inputs and loop-thru
Unbalanced Input connections
Figure 7
Unbalanced XLR wiring schematic
The XLR input connectors are electronically balanced, and wired according to the IEC
268 standard (pin2 = hot). XLR input connector should be wired as follows:
Pin1 Ground/shield
Pin 2 Hot (+)
Pin3 Cold (-)
Figure 6
Balanced XLR wiring
schematic
NOTE
When linking the same source signal to several input channels, be aware that
there is a limit to the number of channels an output source can “drive”. A
typical output source (e.g. a DSP crossover unit) can drive up to four amplifier
channels before external line-drivers might be required to buffer the signal.
12
3
+
Gnd
12
3
+
-
+
-
To connect an input to an unbalanced source, it is possible to connect pins 1 and3 in
the XLR plug at the amplifier end of the cable. However, a better method is to connect
pin 3 to the shield at the source end of the cable, as this usually results in better hum
and noise rejection. Balanced input connections are recommended whenever possible.
AMPLIFIER
TD-14000
8
Precautions Introduction Front Panel Rear Panel Operation and Performance
Binding Post(BP)Output connectors
Figure 8
Binding Post outputs
!
Refer to the instructions in this
section if your amplifier I equipped
with Binding Post output connectors.
Connect the positive (+) loudspeaker
cable to the positive (+) red
terminals. Connect the negative (-)
loud speaker cable, to the negative () black terminals. For bridge mode,
connect the positive (+) terminal on
Channel B to the negative (-)
loudspeaker cable.
The outputs on The TD-14000 amplifiers produce high voltage. Do not connect or
disconnect the loudspeaker cables while the mains power is on. Never operate
the amplifier with any portion of bare loudspeaker wore exposed.
NOTE
NOTE
Never connect an output terminal to ground, or to any other input or output.
Observe relative loudspeaker polarity: loudspeakers connected in reverse
polarity will exhibit degraded performance, particularly in bass frequence, and
may be damaged as a consequence.
Use a high-quality stranded loudspeaker cable, and keep cable run as short as
possible.
Output bridge mode
It is possible to bridge channels in two-channel versions. When bridged, the input source must
be connected to input (A+B) respectively. Output speaker cables must be connected to the
plus pole on channel A and the minus pole on B.
Most power amplifier designs, when bridged, automatically introduce a +6 dB input gain boost
which can lead the user to conclude that power” when in bridge mode. This is clearly not the
case, as the gain boost artificially enhances perceived power at the cost of headroom. The
TD14000 amplifier work on globally set constant gain, and automatically compensate the input
gain by -6 dB. For example, if the amplifier is configured in a three-channel mode, then the
selected gain is maintained from input to output on all channels.
AMPLIFIER
TD-14000
9
Precautions Introduction Front Panel Rear Panel Operation and Performance
Amplifier Gain
Channel gain/level (front-panel pots)
Amplifier sensitivity
The TD-14000 amplifier feature adjustable input gain. This versatility enables the amplifier
to accommodate a multitude of system configurations with various input sources and
speaker layouts. Amplifier gain is set globally for all channels. The range is +23 dB to +44
dB in 3 dB steps. Individual channel fine level adjustment is available using the
potentiometers on the front panel.
The unique adjustable input gain feature of the TD-14000 makes it easier to attain the
optimum balance between headroom and signal-to-noise ratio in the signal path. A weak
signal at the input might require the gain to be raised in order to achieve maximum output
power with the lowest signal-to-noise ratio. A “hot” input signal, however, would require a
lowering of the gain to avoid sending the amplifier a lowering of the gain to avoid sending
the amplifier into Voltage of the gain to avoid sending the amplifier into Voltage or Current
clipping. See Appendix to review the table containing Gain verus VPL setting implications
for input sensitivity and output power. Bridge mode operation automatically compensates
by -6 dB, keeping all channels at the same gain.
Individual channel gain (level) may be adjusted using the potentiometers located on the
front panel. Range I from 0 dB to - infinity.
NOTE
If the level control is used to attenuate to a lower level than the headroom
relative to input sensitivity AND the amplifier input is driven into clip, there is a
danger of clipping the input stage before the current or voltage peak limiters are
activated.
Sensitivity I defined as how many Volts (rms) or dBu (referred to 0.775 Vrm) are required
to achieve full(maximum) output power. As the output power varies with the load
impedance, 4 ohms is usually the common reference. Since TD14000 amplifier are
capable of providing multiple maximum output power levels through use of the VPL
feature, many sensitivity calculations may be required for a single amplifier. We
recommend use of the DeviceControl software to simplify this process. DeviceControl’s
Device Viewpage, used in combination with the DIP-switch settings display, will
automatically produce a sensitivity calculation from the given data ( VPL, Gain and load).
Output Voltage Peak Limiter(VPL)
Voltage Peak Limiter (VPL) is a unique feature in TD14000 amplifier. It is used to select
the maximum power available on each output channel. VPL levels are set using the rearpanel DIP-switches; eight level positions are offered.
AMPLIFIER
TD-14000
10
Precautions Introduction Front Panel Rear Panel Operation and Performance
Figure 9
V peak to Vrms tables
for the FP+Series
The value for VPL are displayed as maximum Voltage
Peak. To translate Voltage Peak into Vrms, you must
divide the Voltage Peak values by 1.41(see table). The
VPL allows you to set the correct maximum output peak
power for optimum performance with the connected
speakers. The correct setting depends on the system type
and the specific load connected to the channel. Since
each channel can be configured to deliver either very high
voltage peak power or high current draw at lowimpendances, it is important to set the VPL correctly.
If you choose a lower VPL setting, you only reduce the
maximum output voltage. At the same time, this allows
more current headroom for low-impedance loads. The
amplifier thus runs at higher efficiency, with a significantly
reduced risk of going into thermal protection.
The Current Peak Limiter(CPL) ensures that the amplifier will not be damaged by forcing the
amplifier to deliver current levels to the outputs that exceed the physical limits of the
transistors. The CPL keeps the amplifier within the Safe Operating Area (SOA).
The CPL is non-adjustable and has different limit values depending on model type.
CPL activity is indicated by illumination of an orange LED for each channel on the front
panel. Warnings also are shown in the DeviceControl software’s GUI.
A steadily illuminated orange CPL LED (with MUTE illuminated indicates a short circuit
situation (or very low-impedance ). The output will mute for 6 seconds before measuring the
output impedance again. This will the output will automatically un-mute. An input signal must
be present to allow detection of short circuit or low-impedance conditions.
NOTE
The problem can be solved by checking input and output cables and examining
the state of the loudspeaker load. If there is no short circuit present, then the
condition may be rectified by lowering the VPL or input levels.
Protection, faults and warnings
The TD-14000 amplifier incorporate a sophisticated and comprehensive set of
protection features. Faults and warnings are indicted on the front panel.
AMPLIFIER
TD-14000
TD-14000
V peak V rms
195
170
140
116
100
80
66
54
138
121
99
82
71
57
47
38
11
Precautions Introduction Front Panel Rear Panel Operation and Performance
Figure 10
VHF protection attack time vs output power/frequency
Safe Operating Area Detector(SOAD)
VeryHigh requency (VHF) protection
The Safe Operating Area Detector(SOAD) compares output voltage against output current
to enure that the output transistors are working inside their safe operating area.
The SOAD provides fault monitoring and input to the Current Peak Limiter 9CPL0. The
SOAD has no dedicated indicator, and it operation is revealed only in conjunction with
features such as the CPL.
The Td14000 amplifier include protection circuits that detect continuous Ver High
Frequency content in the input signal. The detection begins at approximately 10kHz and
moves upwards to include ultrasonic signal. If VHF signals are detected, the output will
mute for 6 seconds before re-measuring. Once no continuing VHF signal is detected, the
output un-mutes and returns to normal operation.
This feature recognizes that continuous full-scale VHF signals do not appear in “natural”
sources such as music. Any such signals can therefore be considered as a fault when
present. VHF protection is essential in avoiding damage to high frequency drivers.
The VHF protection operational area is dependent on output power level and frequency.
The illustration below shows a decreasing threshold on the output power level, staring at
approximately 10 kHz and rising with a -6 dB slope. This defines the VHF protection area.
When continuous output power above the threshold line is detected the VHF protection
becomes active.
Output
power
-6 dB slo pe
Max. Pe ak
outpu t power
Max. Co ntino us
outpu t power
20Hz 10kHz 20kHz 30kHz
slow
fast
20Hz 10kHz 20kHz 30kHz
Attac k time
VHF pro tecti on
VHF pro tecti on
opera ti on ar ea
AMPLIFIER
TD-14000
12
DC protection
The Attack time for the VHF protection is increasingly shorter at higher frequencies. For
example, an ultrasonic continuous signal will cause the outputs to mute rapidly, where it will
take several milliseconds for a 10 kHz continuous signal to trigger the output mute. This is
shown in the illustration above.
The VHF protection is not a limiter and does not alter the amplifier’s frequency response. it is
implemented solely to detect continuous VHF content. The amplifier will always pass VHF
peaks at full power, with no effect on musical “transients”.
The VHF protection is indicated by a yellow LED on the amplifier front panel, with output
muting for 6 seconds when in action.
NOTE
If you bench test the amplifier using a continuous, full scale sine-wave input
above 10 kHz, the VHF protection will activate and prevent measurement of full
peak output power. (Output will be muted long before maximum output power is
attained.) To measure the true peak output power, use a burst signal.
High-impedance warning(open load)
NOTE
DC protection is implemented on each output to prevent damage to connected
loudspeakers. DC present at the output will trigger muting and illuminate the fault
LED indicator. Any DC present at the output indicates a hardware malfunction
that requires servicing of the amplifier.
A high-impedance (open load) condition is indicated when an input signal above
approximately-29 dB is detected and no functioning loudspeakers are connected to the
amplifier. The fault in indicated by a orange Sig/Hi-imp LED. The indicator is green when a
valid load is present under the same input signal conditions.
NOTE
Since the Hi-impedance detection initially triggers only when the input signal rises
above -29 dB, it might cause the indicator to first turn green, and then red, even
in situations where no speaker is connected.
Low-impedance protection warning
A low impedance or short circuit fault is detected when current draw is high (Current Peak
Limiter active) and when, simultaneously, output signal is low (-4dB LED does not illuminate ).
When this occurs, the amplifier protects the output stage from damage by muting the output
signal and bypassing the circuits. Indication of this fault is a constant orange illumination of the
Current Peak Limiter (CPL) LED on the front panel. The protection will sequence at 6 second
intervals to re-meaure conditions. If the low-impedance fault is no longer detected, the
amplifier will un-mute.
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
13
Temperature protection
NOTE
If the CPL turns constant orange, the output is muted, and the -4dB signal
LED is on, then the amplifier has gone into maximum current protection. This
situation is caused by an excessive input signal and is not due to a short
circuit. Turn down the input signal to avoid or remedy this situation.
Power Average Limiter(PAL)
Thermal measurement points are provided on each output channel as well as on the
power supply. These indicators will, if the pre-specified temperature level is exceeded,
give a high temperature warning. This warning condition I indicated by a flashing TEM
LED on the front panel.
As the amplifier approaches a thermal protection threshold, the warming LED sequence
will start with short “ on-time” bursts. If the amplifier continues to overheat and
approaches the temperature limit, the flashing sequence will be defined by longer and
activated.
If the temperature becomes too high to continue safe operation, the overheated output
channel(s) will be muted until the temperature returns to an acceptable level.
Fully active temperature protection (with muting) is indicated by a constantly illuminated
TEM LED. Temperature measurements will continue at 6 second intervals. The output
will un-mute when the channel or power supply returns to a safe operating temperature.
Soft-Start
The Power Average Limiter (PAL) controls the current-drawing relationship between the
power supply and the main inlet. PAL limits the maximum.
Average power consumption according to the power supply capabilities, ensuring that
the PSU will not overload. In addition, in the larger models that potentially could pull
more current from the mains than the mains fuses are specified to handle (more than16
A), PAL limits the amplifier’s maximum current draw to prevent blowing the mains fuse.
High powered amplifiers with inadequate inrush limiting can pull considerable current
from the mains at turn-on. This can result in tripping of fast-acting mains breakers. Such
is not the case with TD14000 amplifier. The TD14000amplifier have very low inrush
power as the capacitors are charged slowly and in a controlled manner ensuring that
breakers will not trip.
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
14
Level adjust
Level indicators
Front-panel monitoring and adjustments
The front-paneldisplays an array of ten LED indicators for level and status monitoring of
each amplifier channel. Indications related to signal levels are as follows:
Orange CPL (Current Peak Limiter) flashing Indicates that output signal has
reached the limit of the output devices and limiting is in effect.
Red VPL / CLIP Indicates that signal has reached maximum output voltage.(Maximum
voltage is determined by rear-panel VPL settings.)
Green SIG to -4 Indicates output signal levels in normal operating range.
SIG+HI-IMP (green / orange) Indicates input signal above -44 dB. Should the SIG
indicator turn red, this indicates a “high-impedance” or open connection has been
detected at the output. Possible faults include a disconnected cable or malfunctioning
loudspeaker. (In some case a normal condition, such a sub-bass enclosure with highimpedance at a certain frequency, can trigger this indication.) If the -10 dB LED
illuminates and the HI-IMP LED turn orange, then the amplifier has detected an open
load (no loudspeaker connected).
More detailed signal indications are available using the DeviceVontrol software
application.
Mute indication
Performance, Warning and Fault indicators:
Global Indicators:
Level adjust potentiometers (one per channel) are located on the front panel adjacent to
the LED display. The potentiometer’s operational range is 0 dB to minus infinity.
Individual channel Mute is indicated by illumination od the red Mute LED provided for
each channel.
Power on / off (green) indicates that mains power is switched on.
PAL, Power Average Limiter (red), indicates that the amplifier is limiting because the
power supply and / or the mains-inlet fuse has reached maximum capability.
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
15
Channel Indicators:
Maintenance
Bridge mode (yellow) indicates if two channels are bridged using the DIP-switch on
the rear panel.
CPL, Current Peak Limiter (orange), when flashing indicates the maximum possible
current draw has been reached.
CPL, Current Peak Limiter (orange), when constant indicates excessive current draw
caused by a short circuit on the output or very low operational impedance. MUTE LED
will illuminate and the output will mute for 6 seconds before re-meauring the output
impedance. This will continue until the short circuit is removed. CPL remains constant
orange in a fault condition only when an input signal is present.
Temperature (yellow) warning is indicated by a flashing LED. If the amplifier goes into
thermal protect output muted), the TEM LED illuminates constant yellow and the red
MUTE LED illuminates.
VHF, Very High Frequency protection(yellow) indicates that potentially harmful
continuous high frequencies have been detected on the input signal. The output is
muted MUTE LED on).
Hardware fault is indicated when both the CPL and TEM, VHF and MUTE indicators
light up simultaneously. The amplifier requires servicing before placing back in
operation.
During normal operation your TD14000 amplifier will provide trouble-free service. The
only user maintenance required I to periodically vacuum clean the foam dust-filters
behind the front grille.
In some extreme cases it may be necessary for authorized service personnel to clean
the inside of the amplifier. These conditions usually occur after prolonged use in extreme
environments such as those using “cracked oil” smoke machines. If you are using your
amplifier in a heavy duty application, it is recommended to have your amplifier serviced
every 3 years purely a preventative action.
Precautions Introduction Front Panel Rear Panel Operation and Performance
AMPLIFIER
TD-14000
16
NOTE
UNiKA
P R O F E S S I O N A L A U D I O
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