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TABLE OF CONTENTS
1. SAFETY PRECAUTIONS .......................................................................................3
2. GENERAL DESCRIPTION........................... .........................................................5
3. FEATURES AND FUNCTIONS
3.1 Front Panel .............................................................................................................6
3.2 Rear Panel.............................................................................................................. 6
4. CONNECTIONS
4.1 Spe
5. ..............................................................................................................7
OPERATION
6 ....................................................................................................... 8
. APPLICATIONS
7. APPLICATION DIAGRAM.......................................................................................9
8.SPECIFICATIONS .................................................................................................10
9.DIMENSIONAL DIAGRAM ...................................................................................11
aker Connections ...............................................................................................7
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1.SAFETY PRECAUTIONS
Be sure to carefully read all the safety instructions in this manual before use.
Be sure to follow all safety instructions in this manual.
Please keep this instruction manual for future reference.
Safety Warning and Cautions
Safety Cautions and Warnings are used in this manual to prevent bodily injury and property damage. Before
operating this product please read and follow all safety precautions to avoid potential safety risks.
Indicates a potentially hazardous situation which could result in
serious personal injury or death.
Indicates a potentially hazardous situation which could result in
minor or major personal injury or property damage.
When Installing the Unit When the Unit is in Use
D
o not expose this pro
environment where it could be splashed by water
or other liquids.
Only use this product with the
Using higher voltage may result in fire or electric
shock.
Do not cut, kink, damage or modify the power cord.
Avoid using the power cord in close proximity to
heaters, and never place heavy objects on the cord.
This could result in electric shock or fire.
Be sure to replace the speaker terminal cover after
he connections ar
t
applied to the speaker terminals. To avoid electric
shock, never touch these terminals.
Be sure you
safety ground (earth) terminal to avoid electric
shock. Never ground this product to a gas pipe
or other flammable items.
ground the am
duct to rain or an
voltage specified.
e complete. High voltage is
plifier using the
Should any of the following issues occur during use,
immediately switch off the power and disconnect
the power cord from the AC outlet. Make no further
attempt to operate the malfunctioning product,
doing so may cause fire or electric shock. Contact
your Dayton Audio dealer for service and repair.
1. If you detect smoke or a strange smell coming
from the unit.
2. If any liquid or metal gets inside the product.
3. If the product is dropped or falls and case is
broken.
4. If the power cord is cut or damaged.
5. If the sound becomes distorted.
To prevent a fire or electric shock, never open or
remove the product cover; there are high
voltage components inside. Refer all servicing
and repair to your nearest Dayton Audio dealer.
Do not place cups, bowls, or anything containing
liquid or metal objects on top of the product.
Avoid installing or mounting this product on an
unstable or slanted surface. Doing so may
cause the unit to fall, resulting in personal injury
or property damage.
To prevent fire or electric shock, do not insert
metal objects or flammable materials in the
cover or vents of this product.
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SAFETY PRECAUTIONS
When Installing the Unit
Never plug in or remove the powe
hands, doing so may cause electric shock.
When unplugging the power cord, be sure to
grasp the power cord plug; never pull on the
cord itself. Operating the unit with a damaged
power cord may cause a fire or electric shock.
When moving the unit, be sure to remove the
power cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord or cause you to
accidentally drop the product, resulting in
personal or property damage.
Do not block the ventilation areas in the cover.
Doing so may cause heat to build up inside the
unit, resulting in product failure and possibly fire.
Avoid installing the unit in humid or dusty
locations, direct sunlight, near heaters or in
locations generating sooty smoke/steam.
r cord with wet
Do not place heavy objects on top of the product.
This can result in the product or object to fall,
causing personal injury or property damage.
Before powering on the product make sure that
the master volume control is set to the lowest
setting. Loud or high volume noise can damage
or impair hearing.
Do not operate the unit if the sound is distorting.
This is an indication of a product malfunction,
immediately unplug the power and contact your
Dayton Audio dealer for service or repair.
Dust allowed to accumulate inside the product
could result in fire or electrical damage. Be sure to
consult your Dayton Audio dealer for cleaning
service and repair. Periodically clean dust buildup
from the power cord plug and wall outlet to avoid
electrical fire. Ensure the power cord plug is
securely inserted in the wall outlet.
For safety when cleaning or leaving the unit
unattended for long periods of time, switch the
power off, unplug the power cord plug from the
wall outlet. Doing otherwise may cause a fire or
electric shock.
An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.
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2. FEATURES
1. Rated Power: 60W/120W.
2. 100V, 70V constant voltage outputs and 4~16 ohms constant resistance output.
3. Commercial grade toroidal transformers produce high performance audio on a wide range of
frequencies with minimum noise and high fidelity even at high volume.
4. Protection against overload, short circuit and power fluctuation for optimum reliability.
5. VOX feature mutes AUX inputs when input is detected on MIC 1. Time fade adjustment control allows
resumption of music to be quick or gradual.
6. Phantom power available on MIC 1 input for condenser type microphones.
7. TEL priority: TEL input will override AUX 1-2 and MIC 1-2.
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3. FEATURES AND FUNCTIONS
3.1 FRONT PANEL
1 2
1. MIC1 INPUT
MIC1 1/4" phone jack input
2. MIC1/MIC2
MIC volume controls (MIC1/MIC2)
3. AUX1/AUX2
Volume control AUX
4. TEL
Volume control TEL
5. BASS
Bass response adjustment. Rotate clockwise to
increase bass output and counterclockwise to
reduce it.
6. TREBLE
Treble response adjustment. Rotate clockwise to
increase treble output and counterclockwise
to reduce it.
3
11
4
7.MASTER
Master volume control
8.POWER
Power indicator
9.POWER SWITCH
ON/OFF toggle switch
10.LEVEL INDICATORS
Signal output level indicators
11.PROT
Protection mode status indicator.
This indicator will illuminate if the product is in
protection mode due to overheating or overload.
10
7
985 6
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FEATURES AND FUNCTIONS
3.2 REAR PANEL
12
12. ~
110V 60Hz POWER INPUT
13. SPEAKER TERMINALS
Connectors for 4-16 ohms or 70V and
100V speaker
14. MUTE ADJUSTMENT
Adjusts the mute level from 0-20 dB during
signal override of all channels by MIC1 input
15. MIC1 INPUT
Compatible with XLR and 1/4" phono plugs
13
14
15 16 18 19 20
16. MIC 1 PHANTOM
+48V Power switch
17. MIC 2 INPUT
Compatible with 1/4" phono plug
18. AUX INPUT
Compatible with RCA plug
19. LINE OUT
Compatible with RCA plug
20. TEL INPUT G/-/+/
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4. CONNECTIONS
4.1 SPEAKER CONNECTIONS
COM 4-16
70V 100V
4-16
COM 4-16
70V 100V
245
125
70V LINE
COM 4-16
(DA20T)
(DA40T)
70V 100V
The 4-16 ohm and 70V/100V terminals cannot both
be used at the same time.
Impedances indicated in the figures represent the
total speaker system (load) impedances.
Be sure to replace the speaker terminal cover after speaker connections have been made.
4.2 XLR CONNECTIONS
500
250
100V LINE
(DA20T)
(DA40T)
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5. OPERATION
OPERATION
You can only choose two of the four output connectors
to work together. If voltage is 70V/100V the speakers
must have a transformer, make sure the total power
wattage of speaker is 15% less than the power wattage
of amplifier.
TROUBLESHOOTING
Problems
All wires are connected
properly but there is no
audio output
Alarm sounds when
power is turned on
No output
1. No
2. Fuse is blown
3. Volume is turned off
4. No input signal
1. Over
2. Voltage is not stable, too
1. Pro
2. Wrong wiring or connections
Cause
power or wrong
connection
loading or short circuit
high or low
duct is in protection
mode due to high
temperature or malfunction
MUTE FUNCTION
1. TEL has priority over all inputs.
2. MIC 1 is second priority, adjusting the mute level
can override all other input signals except for the
tel signal.
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6. APPLICATIONS
AUDIO SOURCES
TEL INPUT
2
3
1
OUTPUTS
XLR BAL
1-GND
2-HOT+
3-COLD
POWER AMPLIFIER
1
3
2
INPUTS
MIC2
MIC1
SPEAKERS
OUT
AUDIO
R
L
LINK
COM
INPUTS
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7. APPLICATION DIAGRAM
GAIN/AMP
POWER
AMP
GAIN/AMP
COMP
GAIN/AMP
COMP
GAIN/AMP
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8. SPECIFICATIONS
MIXER AMPLIFIERMIXER AMPLIFIER
Model
Rated Power Output
Speaker Output
S/N
Frequency response(At 1kHz half-power output,-3dB)
Tone control(Bass:100 H
Input sensitivity/impedance
MIC 1~2 input section(CH1~2 in@1KHz, preamp out)
Input sensitivity/impedance
AUX 1 input section(AUX in@1KHz, preamp out)
Input sensitivity/impedance
TEL input section(TEL in@1KHz, preamp out)
Input sensitivity/impedance
z,Treble:10 kHz)
DA20T
20W
4~16 ,70V,100V
MIC: 66 dB;AUX: 80 dB
80 Hz~16 kHz
10 dB
MIC1,2: 5 mV/1k ohms
AUX: 350 mV/10k ohms
TEL: 350 mV/10k ohms
5 mV/1k ohms
350 mV/10k ohms
350 mV/
10k ohms
DA40T
40W
Phantom power
Line Out
Total harmonic distortion
Muting function
Channel crosstalk(Separation)
Cooling mode
Power source
Power consumption
Net weight
Dimensions(mm)
+
48 VDC
1000 mV/470 ohms
Less than 0.5%
TEL takes precedence over
all the audio input
MIC1 prior to the other audio
input (except TEL)
50 dB
Air cooling
~110V 60 Hz
40W
3.6 Kg
276 X 245
X 70
70W
4.5 Kg
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UN
9. DIMENSIONAL DIAGRAM
IT: mm
320
320
66
74
64
UN
320
273
64
6
IT: mm
100
Over
100
13
Over
Over
100
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