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DMX15012501
DMX1501 / 2501
1500 / 2500 Watt Power Amplier
ENGLISH
User’s Manual
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DMX1501/2501
1. Re ad th ese ins tru ction s bef ore operat ing this
apparatus.
2.
Keep these instructions for future reference.
3. Heed all warnings to ensure safe operation.
4. Follow all instructions provided in this document.
5.
Do not use this apparatus near water or in locations
where condensation may occur.
6. Clean only with dry cloth. Do not use aerosol or liquid
cleaners. Unplug this apparatus before cleaning
.
7. Do not block any of the ventilation openings. Install
in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug
has two blades and a third grounding prong. The wide
blade
or the third prong is provided for your safety. If
the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet
.
10. Protect the power cord from being walked on or
pinched particularly at plug, convenience receptacles,
and the point where they exit from the apparatus
.
11. Only use attachments/accessories specified by the
manufacturer.
12. Us e only with a cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
wh en movi ng th e ca rt/ap par atus
combination
to avoid injury from tip-
ove
r.
13. Unplug this apparatus during lighting
st
or ms or whe n u nus ed for long
periods of time.
14.
Refer all servicing to qualified service personnel.
Servicing
is required when the apparatus has been
damaged
in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been
exposed to rain or moisture, does not operate
normall
y, or has been dropped.
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons
.
The
exclamation point within an equilateral triangle is in-
tended to alert the user to the presence of important operat-
ing
and maintenance (servicing) instructions in the literature
accompanying the appliance
.
WARNING: To reduce the risk of fire or electric shock, do
not expose this apparatus to rain or moisture.
CAUTION: Use of controls or adjustments or performance
of
procedures other than those specified may result in
hazardous radiation exposure.
The apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases,
shall be placed on the apparatus. The MAINS plug is used as the disconnect device, the disconnect device shall
remain readily operable.
Warning: the user shall not place this apparatus in the confined area during the operation so that the mains switch
can be easily accessible.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
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DMX15012501
DMX1501 / 2501
1500 / 2500 Watt Power Amplier
CONTENTS
Phonic reserves the right to improve or alter any information suppied within this document without prior notice.
V1.1 APR 12, 2006
INTRODUCTION ........................................................................................................................4
FEATURES .................................................................................................................................4
INSTALLATION ..........................................................................................................................5
FRONT PANEL DESCRIPTION ................................................................................................. 6
REAR PANEL DESCRIPTION ....................................................................................................7
DIMENSIONS ........................................................................................................................... 12
BLOCK DIAGRAM ................................................................................................................... 13
SPECIFICATIONS .................................................................................................................... 14
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DMX1501/2501
INTRODUCTION
Thank you for choosing the Phonic DMX1501 or
DMX2501 power amplier. The unit is designed to
provide a good combination of power, audio clarity,
reliability and durability. An efcient heat-dissipation
system comprising a high-surface area heat sink
coupled with a variable speed fan ensures quiet and
reliable cooling. Unreal sound quality and a sturdy
construction make this unit ideal for a multitude of
amplication tasks; from studio installations to mobile
DJs, houses of worship and touring bands.
We know how excited you no doubt are to unpack
your amplier and set it up right now, however in order
to get the best performance out of your DMX, please
read this user’s manual carefull, and store it safely for
future reference.
FEATURES
●
Output power: 1500W @ 2Ω stereo (DMX 1501)
Output power: 2500W @ 2Ω stereo (DMX 2501)
●
High current power supply for increased reliability
and performance
●
Effectively runs in Stereo, Parallel and Bridge
Mono modes
●
Balanced 1/4” TRS and XLR inputs for maximum
exibility
●
Front mounted gain controls for easy access
●
Selectable High-Pass lter at 30Hz or 50Hz
●
Performance Indicators: Signal and Peak
●
Short circuit, thermal, subsonic, RF protection,
output DC offset
●
Power on/off muting
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DMX15012501
INSTALLATION
MOUNTING
The DMX power ampliers can be installed in a stan-
dard 19” equipment rack. This requires a total of 2
units of free vertical rack space, and the device must
be secured to the rack cabinet with 4 rack mount
screws and cup washers. In any one rack, it is best to
mount power ampliers one above the other, with at
least one unit of space between two ampliers. This
provides more efcient airow and support.
COOLING
A single thermo-sensitive variable-speed fan starts
running as soon as the DMX1501 or DMX2501 is
turned on. Before mounting your amplier, you should
familiarize yourself with its cooling requirements.
Airow restrictions are the most common cause of
inadequate cooling. They may result from improper
mounting, bundles of power cords, clogged dust lters and closed rack doors. Air ows from the rear
of the unit to the front, so it is important not to block
the amplier’s rear air vents. Ensure you leave some
space at the front and rear of the rack to prevent heated air being drawn back into the airow.
WIRING
The DMX1501 / 2501’s balanced XLR and TRS input
connectors will accept the line-level output of most
devices. The amplier’s built-in connectors can be
wired similarly for balanced or unbalanced, oating
or ground-referenced sources. The output connec-
tors include binding post, which provide an easy
connection when using banana plugs, spade lugs,
and Speakon connectors.
SPEA KON PIN OUT
PIN PIN
PIN PIN
1+ 1
1
1+
1+
1-
1-
BRG+ BRG-
2
2
2
2
2-
2-
2+
2+
2+
NA
NA
CH2
CH
CH
CH
CH
CH1
INPUT WIRING
OUTPUT WIRING
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DMX1501/2501
FRONT PANEL DESCRIPTION
1. Power Switch
Although the DMX amplier features power-on mut-
ing, it is always a good idea to reduce both the gain
controls before turning on the amplier. The powering-
up procedure for an audio system should start from
instruments and then mixer, and you should verify that
all system operations are normal before turning on the
amplier.
2. Signal LEDs
Each channel of the power amplier features a signal
LED to show that an audio signal has been received
by the channel. The threshold for the indicator is -35
dB. Any noise above this level will cause the LED to
light.
1
3. Peak LEDs
When the audio signal drives the amplier output cir-
cuit beyond its power capability, it will clip. The peak
limiter detects this and quickly reduces the gain to
minimize the amount of overdrive, so as to preserve
as much of the program dynamics as possible. The
Clip LED will also come on if the speaker terminals are
short circuited, or the impedance of the load between
them is too low. Under these circumstances, the LED
will stay on until the fault is rectied.
4. Gain Controls
These two knobs are the level controls for each channel of the amplier. The gain increases as the knob
is turned clockwise. This unit features detented gain
controls.
5. Power LED
When the power is on, this small blue LED will light
up.
4
2
3
5
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DMX15012501
REAR PANEL DESCRIPTION
6. Input Connectors
The power amplier offers XLR and TRS input connectors for your convenience. The DMX amplier
can accept any line-level signal. When in Parallel
mode, the input from channel 1 is doubled over and
sent through to the channel 2 output, therefore rending the channel 2 input connection useless.
7. Mode Switches
LIMITER ON/OFF
The DIP switched labeled 1 and 10 will allow you to
activate the peak limiter circuit built into the power
amplier. This function will reduce distortion and protect speakers. To activate the built-in limiter on channel 1, move the number 1 DIP switch to the right; to
activate the built-in limiter on channel 2, move the
number 10 DIP switch to the right.
LOW CUT FILTER
DIP switches 2 and 3 can activate a low cut lter
on channel 1; DIP switches 8 and 9 can activate an
LCF on channel 2. A low cut lter will roll off signals
below either 30 Hz or 50 Hz to improve sub bass
performance by limiting sub bass cone motion, as
well as making more power available for the speakers’ rated frequency range. To activate the low cut
lter on channel 1, DIP switch 3 should be moved
to the left position. DIP switch 2 decides the cut off
frequency of the LCF, 50Hz (left) or 30Hz (right). To
activate the low cut lter on channel 2, DIP switch 8
should be moved to the left position, and DIP switch
9 determines the cut off frequency.
6
6
7
LIMI TER ON
MODE SWITC H
LOW CUT F ILTER
MODE SWITC H
30Hz LCF 50Hz LCF
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DMX1501/2501
Left (or CH1, or HF)
Right (or CH2, or LF)
STEREO MODE
2-
2+
HF 1+
HF 1-
LF 2+
LF 2-
1-
1+
1-
1+
1-
1+
CH2-
CH2+
CH1+
CH2+
CH1+
CH1-
Left
Right
Left
Right
Left
Right
left (or Right)
or
or
Set Am p Mode
to Ste reo
MODE SWITCH
PARALLEL / STEREO / BRIDGE MONO
Turn the power off before changing the operation mode
as to avoid damaging your amplier. The Number 4
and 5 DIP switches allow users to change between
stereo and parallel input modes, whereas DIP switches 6 and 7 are used to activate bridge mono mode.
Stereo Mode: in stereo mode, each channel of the
amplier runs independently with its own signal and
speakers. To set the amplier to stereo mode, set
DIP switches 4, 5, 6 and 7 to the left position. The
loading of each speaker in stereo mode should be
above 2 ohms.
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DMX15012501
Mono Input
PARALLEL MODE
2-
2+
1-
1+
1-
1+
1-
1+
CH2-
CH2+
CH1+
CH2+
CH1+
CH1-
Mono PA
Mono PA
Mono PA
or
or
Set Am p Mode
to Par allel
MODE SWITCH
Parallel Mode: this mode allows the input of channel 1 to feed channel 2 also, allowing the channel
1 and 2 outputs to drive their own speakers independently, however with the same source. To set
to parallel mode, DIP switches 4 and 5 should be
set to the right, however switches 6 and 7 should be
positioned to the left. The loading of each speaker in
parallel mode should be above 2 ohms.
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DMX1501/2501
Mono Input
BRIDGE MODE
Mono PA
(or Subwoofer)
CH1+
CH2+
or
CH1+
CH2+
Mono PA
(or Subwoofer)
Set Am p Mode
to Bri dge Mono
MODE SWITCH
Bridge Mono: the signal of both inputs is combined,
and fed through the bridge mono outputs at twice
the power. The channel 2 gain control should be set
to a minimum, and a rated load must be used for the
higher output power. To set bridge mono mode, DIP
switches 4, 5, 6, and 7 should all be set to the right.
The loading of the speaker in bridge mono mode
should be above 4 ohms. Always use the channel
1 VR to achieve the desired gain, and leave the
channel 2 VR at the minimum level.
Please consult setup diagrams for correct speaker
conguration.
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DMX15012501
8. Fan
This variable speed fan automatically maintains a
safe internal temperature. Keep the vents clear to
allow full airow, as cool air will be drawn into the
rear of the amplier.
9. Output Connectors
A pair of versatile binding posts and Speakon connectors are provided for output connections of each
channel. Loudspeakers can be easily connected using banana plugs, spade lugs, bare wires or Speakon
connectors. Spade lugs and bare wires should both
be screwed down tight, as to avoid a short circuit.
The Speakon connector for channel 1 includes channel 1, channel 2 and bridged mono pin connecting
points. A pin out information could be found beside
the Speakon connector. The loading of each speaker
in stereo or parallel mode should be greater than 2
ohms, and in bridge mono mode should be above
4 ohms. When in Bridge mode, use the center two
connectors only.
10. Reset Breaker
With rated loads and output levels, the breaker
should only shut down the amplier in rare instanc-
es of failure. The circuit breaker can also shut down
the amplier in cases where extremely low-imped-
ance loads and high output levels result in a current
draw that exceeds its rating. In any instances, if the
breaker needs resetting, this is where it is done.
11. Power Connector
Connect an AC power cable to the DMX amp’s
power connector and a suitable power source will
allow the unit to function. This connector is a 3-pin
grounding type cable that, as this is a safety feature,
should not be defeated. Check to ensure that lo-
cal AC voltage levels coincide with your amplier’s
power requirements before connecting the plug.
7
10 11
8 9
6
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DMX1501/2501
DIMENSIONS
All measurements are shown in mm/inches.
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DMX15012501
R CH
ATTENUATOR
THERMAL
SENSING
1
L CH
ATTENUATOR
3
PARALLEL
BRIDGED
STEREO
SWITCH
30Hz
50Hz
HIGH
PASS
FILTER
3
L CH LIMITER LED INDICATOR
OVER CURRENT PROTECTION
MUTING
21
MUTING
LED INDICATORR CH LIMITER
30Hz
50Hz
HIGH
PASS
FILTER
DC FAN SPEED
2
THERMAL
SENSING
CHASSIS GND
OVER CURRENT PROTECTION
STEP POSITIVE
POWER SUPPLY
STEP NEGATIVE
POWER SUPPLY
STEP POSITIVE
POWER SUPPLY
STEP NEGATIVE
POWER SUPPLY
R CH POWER SUPPLY
L CH POWER SUPPLY
BREAKER
THERMAL PROTECTION
AC INPUT CKT
L CHSPOUT
R CHSPOUT
L CH
PHONE JACK
L CH
XLR JACK
R CH
XLR JACK
R CH
PHONE JACK
T1
DMX2501
8
76
5
4
3
181716151413121110
9
2
1
BLOCK DIAGRAM
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DMX1501/2501
SPECIFICATION
DMX 1501
260 W
400 W
290 W
470 W
720 W
810 W
940 W
1430 W
< 0.01 %
31 dB
DMX 2501
450 W
650 W
500 W
760 W
1200 W
1300 W
1530 W
2400 W
< 0.02 %
34 dB
Model Name
Power/Channel, Both channel driven
8Ω, 20 Hz-20 kHz, 0.1% THD
4Ω, 20 Hz-20 kHz, 0.1% THD
8Ω,1 kHz (EIA), 0.1% THD
4Ω,1 kHz (EIA), 0.1% THD
2Ω,1 kHz (EIA), 0.1% THD
Power/Bridge Mono
8Ω, 20 Hz-20 kHz, 0.1% THD
8Ω,1 kHz (EIA), 0.1% THD
4Ω,1 kHz (EIA), 0.1% THD
Performance
Frequency Response 20 Hz – 20 kHz (+0/-1dB)
5 Hz – 60 kHz, (-3dB drop point)
Damping Factor > 300 @ 8Ω
Total Harmonic Distortion
Input Sensitivity @ 8 Ohm 1.23Vrms / 4.0dBu
Gain
Signal/Noise 100 dB, 20 Hz – 20 kHz.
Low Frequency Filter 30 or 50Hz, selectable
Controls & Indicators
Front Panel Power Switch, Gain Controls
Rear Panel Mode
(Stereo, Parallel, Bridge, LF lter, Limiter), via 10-position DIP switch.
Power Blue LED
Signal Green LED, 1 per channel
Peak Red LED, 1 per channel
Connectors (each channel)
Input Balanced XLR and 1/4” TRS
Output SPEAKON connector & Binding Post
Protection
Cooling system Fan Cooled, speed regulated, thermal protection.
Amplier Protection against short circuit, no-load and RF interference conditions.
Stable into reactive or mismatch loads.
Loudspeaker/Load Turn-ON/Off Muting, AC coupling
Weight 16 kg (35.2 lbs) 17 kg (37.4 lbs)
Page 15
6103 Johns Road #7
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DMX1501/2501
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