TOA A-3248DME-AS Digital Mixer Amplifier Instruction Manual

A-3248DME-AS Digital Mixer Amplifier

INSTRUCTION MANUAL

DIGITAL MIXER AMPLIFIER
A-3224D-AS 1/A-3248D-AS 1
A-3212DM-AS 1/A-3224DM-AS 1/A-3248DM-AS 1
A-3212DMZ-AS 1/A-3224DMZ-AS 1/A-3248DMZ-AS 1
A-3248DME-AS 1
Thank you for purchasing TOA’s Digital Mixer Amplifiers.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

SAFETY PRECAUTIONS

• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety.
• 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 andunderstand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
**WARNING**

When Installing The Unit

• 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.
• The socket-outlet shall be installed near the equipment and the plug (disconnecting device) shall be easily accessible.
• 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 these 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 The Unit is in Use

• 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 components 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.

CAUTION

When Installing The Unit

• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.
• When unplugging the power supply cord, ba 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 fra of electric shock.
• 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 of atectric shock. When ramoving the power cord. be sura to hold its plug to pull.
• 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.
• Avoid installing the unit in humid or dusty location, in location exposed to direct sunlight. near the heaters, of in location generating sooty smoke or steam. As doing otherwisa may result in fire or electric shock.
• Keep the distance for all side of units 10 cm away from the object that may obstruct air flow for inter – nal units temperature rise prevention.

When The Unit ts In Use

• Do not place heavy object on the und as this may cause it to fall or break which may result in personal injury and/or property damage. In addi – ton, the object it setf may fall of and cause injury and/or damage.

GENERAL DESCRIPTION

TOA’s Digital Mixer Amplifies A-3000D-AS series. A-3000DM-AS series, A -SOCODMZ-AS senes and A-3248DME-AS are high performance mixer power amplifier suited for broadcasting paging or background music in achools. offices, shops, factones. mosques, Churches and large rooms.

FEATURES

• High durability, high reability and high performance.
• Four (Five microphone on A-3248DME-AS) microphone inputs, two AUX inputs and one recording output.
• Speaker output of constant voltage distribution system (100V) & low impedance (40).
• Operates on AC power.
• Muting function.
• Independent input volume control and master volume Control.
• Independent tone control of boost and cut typ for both high and low fraquency.
• MIC 1 equipped with phantom power for condenser microphone and also option for Chime Microphone.
• Currant limiter circuitry protects transistor and thermal protection circuitry pravent a failura due to overhaat.
• AN MIC inputs are olectronically-batanced input.
• Additional features such as built in MP3 Player, Zone Selector and 5 Bands Equakzer

NOMENCLATURES AND FUNCTIONS

For A-3000D-AS Series, A-3000DM-AS Series & A-3000DMZ-AS Series
[Front Panel] [Rear Panel]

For A-3248DME-AS
[Front Panel] [Rear Panel]

1. Power Switch
   Press to turn ON the power.
   Press again to turn off the power.

2. Power Indicator
   Lights green when power is switched on.

3. Protect Indicator
   Lights when protect function activated.

4. Signal Indicator
   Lights green for indicates present of an output signal.

5. Peak Indicator
   Lights red to indicate the output signal reaches the peak level, this indicates that sound is distorted. In such case, adjust each volume control to reduce output level.

6. Volume Control for MIC
   Adjust the microphone level.

7. Volume Control for MIC 4/AUX +
   Adjust levet for MIC 4/AUX 1 whichever activated, 588 number 26. Not avaiable for A-3248DME-AS.

8. Volume Control for AUX
   Adjust the AUX level.

9. Master Volume Control
   Adjust overall signal tevel.

10. Bass Control
    Rotate each knob clockwise to increase bass frequency response and counter clockwise fo reduce it. Center position give flat characteristic.

11. Treble Control
    Rotate each knob clockwise to increase treble frequency response and counter clockwise fo reduce it. Center position give flat characteristic.

12. MP3 Panel
    Builtin MP3 feature. Not available for model A-3224D-AS & A-3248D-AS.
    For detail of MP3 panel, please see page 6.

13.  MP3 Volume Control
    Adjust the MP3 level. Not avaiable for modet
    A-3224D-AS & A-3248D-AS.

14. All Call Knob
    Push the knob to activated all zone terminals. Avaitable only for A-3212DMZ- AS, A-3224DMZ-AS and A-3248DMZ-AS.

15. Zone Selector Knob
    Push the knob to activated each correspondent zone terminal. Available only for A-3212DMZ-AS.
    A-3224DMZ-AS and A-3248DMZ-AS.

16. S§ Bands Equalizer
    Rotate each knob clockwise to increase Corre spondent fraquency response and counter clock wise to reduce it. Center position give flat characteristic. Available for A-3248DME-AS model.

17. Output Terminal
    Terminal for connecting speaker. Use only with high impedance speaker.

18. Terminal Cover
    To avoid elactric shock by high voltage from output terminal, put back taminal cover after connecting speaker Cords.

19. impedance Selector
    Selecting to 100 V for using high impadance type of loudspeaker connection or 40 for low impedance application.
    Factory preset : 100 V

20. Zone Selector Terminal
    Terminal for zone selector (high impedance). Avaiiable only for A-3212DMZ-AS, A-3224DMZ-AS and A-3248DMZ-AS.

21. MIC 1 Input Terminal
    60 dB {1 mY). 600 2. atectronically balanced.
    For phantom microphone type, see number 28.
    Phone plug uses double pole type. but also can use single pole typa.

22. MIC 1 Input Terminal for Chime Microphone
    Use this terminal for connection of Chime microphone (using FU45 Plug}

23. MIC 2 – 5 Input Terminals.
    60 0B (1 mV). 600 2. etectronmcally balanced.
    Because microphone input is balanced type. phone plug usés double pole type. but also can use even single pole type.
    Mic 5 available for A-3248DME-AS model only.

24. AUX 1 & AUX 2 Input Terminal
    -20 dB, 10k, unbalanced. Monaural ACA pin jack.
    Accapt exiamal equipment output signal.

25. Recording Output
    0 dB (1 V}, 600 ©. unbalanced. Output all input signal before the master volume control. Connect to a Cassete deck, etc when recording the broadcast content.

26. input Selector
    Selecting to MIC 4 for using balanced -60 dB 600 0 input. of selecting to AUX 1 for unbalanced -20 dB 10 k input. Not avaiable for A-3248DME-AS model.
    Factory preset : AUX 1

27. Muting Level Control
    Adjust attenuating level from 0 to -30 dB.
    Factory preset : -30 dB (maximum muting level).

28. Phamtiom Switch
    Selecting to ON position supplies power for fondenser microphone from MIC 1. Be sure to select OFF when using the microphone that can not operated on phantom power. The phantom power is21 VDC.
    Factory preset : OFF

29. Function Switch
    Selecting to left for using balanced connection -60 dB 600 2 input (phone jack), or selecting to right for using chime microphone input (R45).
    Factory preset : let (phone jack).

30. Ground Terminal
    Connect to ground (earth) to avoid ateciric shock.

31. AC Power Cord
    Connact to an AC power source.
    [MP3 Panel]

32. AUX REC/PSET
    In Aux mode, pressing thie button will record to SD card. if SD card is not inserted fo the slot, the unit will record to inserted USB. It pressing this button while recording, the unit wil stop recording, and track that was being recorded will be saved in the last space of the folder. LED is turned ON when recording begins and will OFF when recording ends {on Panet MP3}. Display text appear “REC* and time. In FM mode, pressing this button enter the station saving mode. Than press play to save the current frequency as a station.
    In MP3 mode, press thés bution tp Choose the track that the user wants to datete and then pressing it for 3 seconds to actually delete the track. Text appear “DEL’.

33. Volume Decrease/Skip to Last Track
    Keep pressing this button will decrease the volume (display: U32—-U00}.
    In MP3 mode. pressing this button will skip to tha fast track.
    In FM mode. pressing this button will tune down – wards in frequency with each segment of 50 kHz.
    Pressing this button for 3 seconds will search stations downwards in frequency and the search will automatically stop at the frequency where there is station avadable.

34. Play/Pause
    In MP3 mode, prossing this button, PLAY will switch to PAUSE. Preesing again PAUSE will switch to PLAY. Display ****will appear, and time indicator blinking. if the unit has been STOPPED, it will switch fo PLAY. In FM mode, pressing this bution will skip fo the channel Frequency has been saved.
    In FM mode. pressing this button for 3 seconds will automatically search and save available station in a maximum number of 30 station. Display CHO01. CHO02. …CH30.

35. Volume Increase/Skip to Next Track
    Keep pressing this button will increase the volume (display: U00–U32}.
    In MP3 mode. pressing this button will skip to tha next track.
    In FM mode, pressing this button will tune upwards in frequency with aach segment of 50 kHz. Pressing this button for 3 seconds will search stations upwards in frequency and the search will automatically stop at the fraquency where thera is station available.

36. Mode
    When the unit is turned ON, proesing this button for 3 seconds will turn off the unit. When the unit és turmed OFF. pressing this button will turn on the unit, Disptay will play to the tast mode. When the unit is turned ON, prassing this button will switch between the modes. Display text will appear “AUX — FM — USB -. SD — BT”.

37. Diaplay Indicator
    Indicator 188:88. This indicator illuminates by Counting/increasing when operating MP3 Player “For volume displayed (U-00 — U-32) with 4/- 1 “For FM Radio in increase – decrease vol mode is displayed (87.50 —- 108.00}with +/- 50 kHz
    “For FM Radio in play/pause mode can be saved and displayed (CHO1 —. CH30}
    USB Indicator : when USB connected this indica – tor lights up and blinking on the display. file is ready to operate.
    SD Indicator : when SD connected this indicator lights up and blinking on the diaplay, file is ready to operate.
    FM Indicator : when FM mode selected or when its turned on this indicator lights up and blinking ‘on the display, file is ready to operate.
    BT Indicator : when connected / pairing this indicator lights up with blinking on the display. file is ready to operate.
    Play Indicator : in MP3 mode. dluminated with blinking display. indicating operated PLAY.
    Pause indicator : in MP3 mode. idluminated with blinking display. indicating operated PAUSE.
    AUX indicator : when AUX mode selected. input from AUX & MIC connected to MP3
    REC Indicator : AUX mode selected. then press PSET then start recording. In display, this indica – tor blink and result saved to installed USD or SD.

38. AUX REC Indication
    Lights when playing recording result.

39. IR Receiver
    Signat receiver from optional remote contro.

40. SD Card Input
    Socket for SD Card Input

41. USB Card Input
    Socket for USB Input.
    Note : -not racommendad for charging

ABOUT OPERATING MP3

AS Digital Mixer Amplifier - fig 8](https://manuals.plus/wp- content/uploads/2023/11/TOA-A-3248DME-AS-Digital-Mixer-Amplifier-fig-8.jpg)
| •MP3 Mode (USB or SD)
– Playing normal condition.
– Press button a pause.
– Press lotion again will normal play.| USB instal
•FM Mode
– Playing normal condemn.
– Press button *wet change next channel.| FM Mode
– Press the button 3 seconds wet automancaly search and save channel from CHOI until CH30 after ccenckmon wit play m CHOI.| FM Mode
| •MP3 Mode (USB or SD) .Pressourrn MODE (display AUK) and then press button AUX REC fwa save input from M.1)( IN. WIRED MIC. WIRELESS MIC at SD as first pnorrty and then USB card and volume control is made Max).
– View second we be record Dent a appem • rEC ‘ and time – Press button **to hold. press again ***will continue to Record. (for prepared recording).
– Press button AUX REC again will stop. and wil be saved in the last space of the folder.| AUX Mode anZ nsen SD card
| FM Mode
– Press button AUX REC enter the station saving mode.
– Press PLAY to save the current frequency as a station
– Press button AUX REC for 3 sec to actually save this frequency to this position.| FM Mode

MUTING FUNCTION

MIC 1 has a priority function. When MIC 1 input is used it take precedence and automatically attenuate the volume of MIC 2, MIC 3, MIC 4, MIC 5, AUX 1 & AUX 2 inputs by 0 up to 30 dB, whichis adjustable with the MUTE ADJ on rear panel. The attenuation level is preset for -30 dB at the factory.
Remark : About mute function
When signal of MIC 1 appear, mute circuit work promptly.
When signal of MIC 1 disappear, it returns to it previous state about 3 seconds later.

CONNECTIONS

7.1. Input Connections
«MIC 1 – 5 Connection (Phone Plug)
Because MIC input is electronically balanced type, it uses double pole phone plug.
However, the microphone input circuit is in a condition of unbalance when using single pole type.
Since the state of unbalance is more vulnerable for noise generation, the recommended length of microphone cable is at less than 10 meters.
AUX Input Connection (RCA Pin Jack)

Signal source (Tuner, Cassette Tape, etc)
Chime Microphone Connection
(Straight Ethernet Plug)

7.2. Speaker Connections
Impedances indicate at the terminal represent the total impedance (load) of the speaker system. Impedance
can be switched from high impedance to low impedance (4 9)
Total impedance for 100 V line :

• 83Ω (A-3212DM-AS, A-3212DMZ-AS)
• 422Ω (A-3224D-AS, A-3224DM-AS, A-3224DMZ-AS)
• 212Ω  (A-3248D-AS, A-3248DM-AS, A-3248DMZ-AS, A-3248DME-AS)

Using Screw Terminal
Using 5 Zones Selector Terminal
CAUTION !
Impedances indicate at the terminal represent the total impedance (load) of the speaker system.
7.3. Example of External Equipment Connections
Example of External Equipment Connections (4 mic input)
Dynamic Microphone (PHANTOM switch “OFF”) or Condenser Microphone (PHANTOM switch “ON”)                     Example of External Equipment Connections (5 zone selector , 3 mic input)
Dynamic Microphone (PHANTOM switch “OFF”) or Condenser Microphone (PHANTOM switch “ON”)
Example of External Equipment Connections (model with 5 band equalizer, 1 chime microphone, 4 microphone input, 2 aux, 1 rec out)

BLOCK AND LEVEL DIAGRAMS

[A-3000D Series, A-3000DM Series, A-3000DMZ-Series] [A-3248DME-AS]

DIMENSIONAL DIAGRAM

Dimensional diagram represent by A-3248DMZ-AS image. Outer dimension for all series are same.
Units : mm (inches)

SPECIFICATIONS

A-3000D-AS 1 Series, A-3000DM-AS 1 Series

Model no.| A-3224D-AS 1| A-3248D-AS 1| A-3212DM-AS 1| A-3224DM-AS 1| A-3248DM- AS 1
---|---|---|---|---|---
Power Source| 100 240 V AC- 50/60 Hz
Power Consumption (EN 60065)| 62 W| 99 W| | 44 W
62 W| 99 W
I
Rated Output| 240 W| 480 W| 120 W| 240 W| 480 W
Input| MIC 1| —60 dB, 600 0, Balanced, Phone Jack, selectable to RJ45
MIC 2 – 3| —60 dB, 6000, Balanced, Phone Jack
MIC 4| —60 dB, 6000, Balanced, Phone Jack, selectable to AUX 1
AUX 1| —20 dB, 10 kil, Unbalanced, RCA pin jack, selectable to MIC 4
AUX 2| —20 dB, 10 Id), Unbalanced, RCA pin jack
MP3| _| LED Display, support USB, SD/MMC card
(up to 32 GB), bluetooth, radio FM, record
Output| Speaker Out| Speaker output in screw type terminal
Direct Line (selectable)| 42 Ω (100 V)| 21 Ω (100 V)| 83Ω (100 V)| 42Ω (100 V)| 21 Ω (100 V)
4S2
Rec Out| 0 dB, 6000, Unbalanced, RCA pin jack
Phantom Power| DC +21 V (MIC 1)
S/N Ratio| Over 60 dB
Total Harmonic Distortion| Under 1% at 1 kHz, 1/3 rated power
Muting| Mic 1 : Mute other input signals by 0 – 30 dB attenuation
Frequency Response| 50 – 20000 Hz
Tone Control| Bass: ± 10 dB at 100 Hz Treble: ± 10 dB at 10 kHz
Indicator| POWER, SIGNAL, PEAK, PROTECT
Operating Temperature| 0 °C to +40 °C
Ventilation| Fan Cooling| Natural Air Cooling| Fan Cooling
Finish| Panel : ABS Resin, Black Case : Steel Plate, Black
Dimensions| 420 (W) x 100.9 (H) x 357 (D) mm (16.54″ x 3.97″ x 14.06″)
Weight| 4.9 kg (10.80 lb)| 15.0 kg (11.02 Ib)| 14.6 kg (10.14 lb)| 14.9 kg (10.80 lb)1| 5.0 kg (11.02 Ib)

” 0 dB = 1 V
Note : Design and specification are subject to change without prior notice for improvement.
A-3000DMZ-AS 1 Series, A-3248DME-AS 1

Balanced,
Phone Jack
MIC 4| -60 dB, 600 CI, Balanced, Phone Jack, selectable to AUX 1
MIC 5| _
AUX 1| -20 dB, 10 kit, Unbalanced, RCA pin jack, selectable to MIC 4| -20 dB, 10 kit, Unbalanced, RCA pin jack
AUX 2| -20 dB, 10 kit, Unbalanced, RCA pin jack
MP3| LED Display, support USB, SD/MMC card (up to 32 GB),| bluetooth, radio FM, record
Output| Speaker out| Speaker output in screw type terminal
Direct Line (selectable)| 83 Ω (100 V)| 42 Ω (100 V)| 21 Ω (100 V)| 21 Ω (100 V)|
40
Zone Selection| 5 zone selector (all zones simultaneously selectable)| I –
Rec Out| 0 dB, 6000, Unbalanced, RCA pin jack
Phantom Power| DC +21 V| (MIC 1)
S/N Ratio| Over 60 dB
Total Harmonic Distortion| Under 1% at 1 kHz, 1/3 rated power
Muting| Mic 1 : Mute other input signals by 0 – 30 dB attenuation
Frequency Response| 50 – 20000 Hz
Tone Control| Bass: ± 10 dB at 100 Hz
Treble: ± 10 dB at 10 kHz| ± 10 dB at 80 Hz,
315 Hz, 1 kHz,
3.15 kHz, 8 kHz
Indicator| POWER, SIGNAL, PEAK, PROTECT
Operating Temperature| 0 °C to +40 °C
Ventilation| Natural Air
Cooling| Fan Cooling
Finish| Panel : ABS Resin. Black
Case : Steel Plate, Black
Dimensions| 420 (W) x 100.9 (H) x 357 (D) mm (16.54″ x 3.97″ x 14.06″)
Weight| 4.6 kg (10.14 lb)| 4.9 kg (10.80 Ib)| | 5.0 kg| (11.02 Ib)| 5.0 kg| (11.02 Ib)
Removable terminal plug (2 pins) …. 5| –
Accessory

0 dB = 1 V
Note : Design and specification are subject to change without prior notice for improvement.

URL : http://www.toa.com.sg/
133-02-00499-00

References

• TOA Electronics Pte Ltd - Professional Audio Equipment Manufacturer

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