Toa P-3248D-AS 1 User manual

1. SAFETY PRECAUTIONS ............................... 2
4.1
.Front Panel ............................................... 3
4.2. Rear Panel ................................................ 3
ese  the instuctins in this mnu t tin the timum esuts m this unit.
e s ecmmen tht u ee this mnu hn  utue eeence.
2. GENERAL DESCRIPTION ............................. 3
3. FEATURES
........................................................ 3
4. NOMENCLATURES AND FUNCTIONS
5.2. Speaker Connections
............................
5.3. Example of External Equipment
Connections ............................................
5
5
6. INSTALLATION ................................................ 6
9. SPECIFICATIONS ............................................ 8
7. BLOCK AND LEVEL DIAGRAM
................... 6
8. DIMENSIONAL DIAGRAM ............................. 7
5.1. Input Connections.................................. 4
5. CONNECTIONS
INSTRUCTION MANUAL
DIGITAL BOOSTER AMPLIFIER
P-3248D-AS 1
TABLE OF CONTENTS

2
When InstallingThe Unit
When The Unit is In Use
xNever plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
xWhen unplugging the power supply cord, be sure
to grasp the power supply plug, never pull on
the cord it self. Operating the unit with a
damaged power supply cord may cause a fire or
electric shock.
x  When moving the unit, be sure to remove its
power supply cord from the wall outlet. Moving
the unit with the power cord connected to the
outlet may cause damage to the power cord,
resulting in fire or electric shock. When
removing the power cord, be sure to hold its plug
to pull.
xDo not block the upper panel ventilation slots in
the unit’s cover. Doing so may cause heat to build
up inside the unit and result in fire.
xAvoid installing the unit in humid or dusty location,
in location exposed to direct sunlight, near the
heaters, or in location generating sooty smoke or
steam. As doing otherwise may result in fire or
electric shock.
xDo not place heavy object on the unit as this may
cause it to fall or break which may result in
personal injury and/or property damage. In addi -
tion, the object it self may fall of and cause injury
and/or damage.
x
x
Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or
Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.
cautions regarding safety.
x After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage
which could result from mishandling. Before operating your product, read this manual first and understand the safety
symbols and messages so you are thoroughly aware of the potential safety hazards.
WARNING Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Do not expose the unit to rain or an environment where
it may be splashed by water or other liquids, as doing so
may result in fire or electric shock.
Use the unit only with the voltage specified on the unit.
Using a voltage higher than that which is specified may
result in fire or electric shock.
Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the power
cord in close proximity to heaters, and never place
heavy objects including the unit itself on the power
cord, as doing so may result in fire or electric shock.
The terminals marked with the symbol are
hazardous live. The external wiring to these terminals
requires installation by an instructed person.
Be sure to replace the unit’s terminal cover after
connection completion. Because the voltage of up to
100V is applied to the high impedance speaker
terminals,never touch terminals to avoid electric shock.
Be sure to ground to the safety ground (earth) terminal
to avoid electric shock. Never ground to a gas pipe as a
catastrophic disaster may result.
When Installing The Unit
x
x
x
x
x
x
Should the following irregularity be found during
use, immediately switch off the power, disconnect the
power supply plug from the AC outlet and contact your
nearest TOA dealer. Make no further attempt to operate
the unit in this condition as this may cause fire or electric
shock.
If you detect smoke or a strange smell coming
from the unit.
If water or any metallic object gets into the unit.
If the unit falls, or the unit case breaks.
If the power supply cord is damaged (expo
sure of the core, disconnection, etc.)
If it is malfunctioning (no tone sounds.)
To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage compo-
nents inside the unit. Refer all servicing to your nearest
TOA dealer.
Do not place cups, bowls, or other containers of liquid
or metallic objects on top of the unit. If they accidentally
spill into the unit, this may cause a fire or electric shock.
Do not insert nor drop metallic object or flammable
materials in the ventilation slots of the unit’s cover, as
this may result in fire or electric shock.
When The Unit is in Use
x
x
x
x
x
x
x
x
x
1. SAFETY PRECAUTIONS
CAUTION Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.

2. GENERAL DESCRIPTION
3. FEATURES
x ih uiit hih eiiit n hih cst emnce.
x T nce e inuts ne see ine inut.
x
See utut  cnstnt te istiutin sstem (100 ) n  imence (4 :).
x Oetes n th A n  D e.
x Semi ie mste ume cnt n ineenent see ine inut ume cnt.
x Semi ie n ineenent tne cnts  st n cut te  th hih n  euencies.
x Remte e cnt  me cntct inut.
4. NOMENCLATURES AND FUNCTIONS
4.1. Front Panel
4.2. Rear Panel
DIGITAL BOOSTER
1234
567
8
14 17 16 18
3
TOAs Diit Bste Amiie 3248DAS is hih cstemnce ste miies suite  cstin
in  cun music in schs ices shs cties msues chuches n e ms.
9
10 1211 15
13 1319
te.
 : nt cnnecte
1

4
5. CONNECTIONS
5.1. Input Connections
xConnection with the mixer pre amplifier having the balanced type output
It recommends this connection when distance of the mixer pre amplifier is seperated from this power amplifier more
than 10 m or, in the location where there is a lot of electric noise.
xConnection with the mixer pre amplifier having the unbalanced type output
Please make the length of the cable less than several meters.
Mixer
Pre Amplifier
Mixer
Pre Amplifier
1. Power Switch
Press to turn ON the power.
Press again to turn the power OFF.
2. LED Power
Lights green when power is switched ON.
4. LED Signal
Lights green when power is switched ON, and
indicates an output signal.
3. LED Peak
Lights red to indicate the output signal is peak
level, this indicates that sound is distortion. In
such a case, adjust each volume control to
reduce output level.
5. Master Volume Control
Adjusts the overall signal level.
7. Bass Control
Adjusts bass response. Rotate clockwise to
increase bass output, and counterclockwise to
reduce it. The center position provides flat
characteristics.
6. Treble Control
Adjusts treble response. Rotate clockwise to
increase treble output, and counterclockwise
to reduce it. The center position provides flat
characteristics.
8. AC Power Cord
Connects to an AC power source.
9. Remote Power Control
Connects to external switch. With unit’s power
switched ON, shorting Power Remote terminals
can remotely turn off. With OFF, power cannot
be remotely controlled.
11. Output Terminals
Connects to speakers. When connecting
speakers use only one of the speaker output
terminals, low or high impedance.
13. Terminal Cover
To cover high voltage from output/input
terminal. Put back the terminal cover after
connecting cords.
14. 100V Line Input
40 dB, 30 k:, unbalanced. Connects to
100 V line speaker output.
15. 100V Line In Volume Control
Adjusts the overall signal level.
16. Line Input
0 dB, 10 k:, balanced.
Connects to Line Out/Rec Out of Mixer
17. Loop Output
0 dB, 10 k:, balanced.
18. Ground Terminal
Connect to ground (earth) for safety and to
avoid electric shock.
19. Master Volume Bypass
Connect to remote switch for emergency
when master volume minimum position
signal through.
12. Impedance Selector
Selecting to 100 V for using high impedance
type of loudspeaker connection or
4 :
application.
Factory preset : 100 V
Connects to Loop In of other Power Amplifier.
Amplifier or Loop Out of other Power Amplifier.
10. DC Terminal
Connects to a DC power supply 24 V.

5
CAUTION
Be sure to attach the supplied terminal cover after connection completion. Because high voltage is applied
to the speaker terminals, never touch these terminals to avoid electric shock.
5.3. Example of External Equipment Connections
Digital Mixer Amplifier
A-3000D Series
24V DC Battery
Horn Speaker
with Matching Transformer
Column Speaker
with Matching Transformer
Digital Booster Amplifier
P-3248D-AS
Remote
Power Switch
Digital Booster Amplifier
P-3248D-AS
Digital Mixer Amplifier
A-3000D Series
>PC<
Put back this te
CAUTIO
after connecting
>PC<
Put back this te
CAUTIO
after connecting
100 V Line Speaker
5.2. Speaker Connections
CAUTION!
xLow Impedance Speaker
Select to LOW(4 :)
4 - 16 :
Speaker
xHigh Impedance Speaker
Select to HIGH (21 :- 100 V)
100 V Line
Speaker
x Impedance indicated at the terminal represent the total speaker system (load) impedances.
Total impedance of 100 V line : 21 :
x Turn off Amplifier when setting impedance output (LOW or HIGH).
Remote Switch
Note.
NC : not connected
1
11
1
Note.
Use battery with current capacity
minimum 40 Amperes.

7. BLOCK AND LEVEL DIAGRAM
6
6. INSTALLATION
Oe 10 cm
DIGITAL BOOSTER
Oe 10 cm
Oe 10 cm
ee the units  sies e 10 cm (3.94 inches)  m ect tht m stuct i  t eent the units
inten temetue ise.

8. DIMENSIONAL DIAGRAM
7
58.4(2.30)
40(1.57)
420(16.54)
88.4(3.84)12.5(0.49) 6(0.24) 322.6(12.70) 22.7(0.89)
units: mm (inches)
DIGITAL BOOSTER

133-02-00500-00
URL : http://www.toa.com.sg/
9. SPECIFICATIONS
Model No. P-3248D-AS 1
Power Source 100 - 240 V AC 50/60 Hz or 24 V DC
Output Rated
Frequency Response 50 - 20000 Hz
Total Harmonic Distortion Under 1% at 1 kHz, 1/3 rated power
0 dB*, 10 k:, balanced, screw terminal
40 dB*, 30 k:, unbalanced, screw terminal
Input Line In
100 V Line In
Speaker Out Speaker output in screw type terminal
21 : (100 V)
Output
4 :
S/N Ratio Over 70
dB
Tone Control
Ventilation Fan Cooling
Panel: ABS Resin, Black
Finish
Case: Steel Plate, Black
Dimensions
Weight 5.2 kg (11.46 lb)
Power Consumption (EN60065) 99 W (AC operation at 1/8 maximum output without clip)
480 W
Direct Line
Indicator POWER, SIGNAL, PEAK
Operating Temperature
(selectable)
0qto +40 qCC
Control Remote power control, screw terminal
Loop Out 0 dB*, 10 k:, balanced, screw terminal
Remote master volume bypass, screw terminal
Note : Design and specification are subject to change without prior notice for improvement.
* 0 dB = 1 V
420 (W) x 100.9 (H) x 351.3 (D) mm (16.54” x 3.97” x 13.83”)
Bass: r10 dB at 100 Hz
Treble: r10 dB at 10 kHz