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Summary of Contents for Toa A-3506D
- Page 1 OPERATING INSTRUCTIONS MIXER AMPLIFIER A-3506D, A-3512D, A-3524D, A-3548D The figure represents the A-3548D. Thank you for purchasing TOA’s Mixer amplifier. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
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Page 2: Table Of Contents
TABLE OF CONTENTS 1. SAFETY PRECAUTIONS ................3 2. GENERAL DESCRIPTION ................5 3. FEATURES ......................5 4. HANDLING PRECAUTIONS ..............5 5. INSTALLATION PRECAUTIONS ............. 6 6. NOMENCLATURE AND FUNCTIONS ..........7 Front ..........................7 Rear ..........................8 7. CONNECTIONS .................... -
Page 3: Safety Precautions
AC outlet and personal injury. contact your nearest TOA dealer. Make no further attempt to operate the unit in this condition as this When Installing the Unit may cause fire or electric shock. - Page 4 • Contact your TOA dealer as to the cleaning. If dust is • To avoid electric shocks, be sure to switch off the allowed to accumulate in the unit over a long period unit’s power when connecting speakers.
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Page 5: General Description
3. FEATURES • 4 kinds of power amplifier outputs: 60 W (A-3506D), 120 W (A-3512D), 240 W (A-3524D), and 480 W (A-3548D) • Lightweight owing to the built-in digital power amplifier unit • Emergency broadcast and priority broadcast activated by way of the control input (contact) •... -
Page 6: Installation Precautions
5. INSTALLATION PRECAUTIONS • The supplied power supply cord is designed for exclusive use with the unit. Never use it with other equipment. • Install the unit in a well-ventilated environment so that temperature inside the unit will not rise. •... -
Page 7: Nomenclature And Functions
6. NOMENCLATURE AND FUNCTIONS [Front] The figure represents the A-3548D. 1. Power switch 6. Overcurrent protection indicator (Red) Press this switch to turn on the power. To turn off Lights while the overcurrent protection circuit is the power, press this switch again. operating if overcurrent flows through the speaker output. -
Page 8: Rear
[Rear] The figure represents the A-3548D. 14. AC inlet 17. Line output jacks 1 and 2 Connect the supplied power cord to this receptacle. 0 dB*, 600 Ω, unbalanced type, RCA pin jack x 2 Can be interlocked with the zone selection state. WARNING Signals are output from the Line output jacks 1 and 2 regardless of the zone selection when the... - Page 9 (22) is set to 100 V. dedicated input for microphone with a phone plug To change impedance between high and low, use the Impedance setting switch (22). In case of the A-3506D: 8 – 16 Ω 0 dB = 1 V...
- Page 10 29. Input setting switches (Inputs 1 and 2) 32. Input terminals (Inputs 1 and 2) Set the input sensitivity level (LINE or MIC) of the –20 dB* (LINE)/–60 dB* (MIC), 600 Ω, electronically- Inputs 1 and 2 (30, 32). When switched to the balanced, phone jack) microphone input, set the phantom power to ON Input sensitivity can be switched either to the...
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Page 11: Connections
4 to16 Ω* 100 V line 100 V line * In case of the A-3506D: 8 – 16 Ω 100 V line For the audio output at high impedance application setting, refer to "21. Speaker output terminal" on p. 9. -
Page 12: Input Terminal Connections And Settings
7.2. Input Terminal Connections and Settings 7.2.1. Connections A-3506D/3512D/3524D/3548D Inputs 3 and 4 Inputs 1 and 2 Phone jack Phone jack Inputs 1 and 2 Removable terminal block [Inputs 1 and 2] (When connecting a 2-core shielded cable) (When connecting a single core shielded cable) For cable wiring to the removable terminal plug, refer to p. -
Page 13: Connecting To The Power Remote Control Output Terminal
[Inputs 1 and 2] Set the sound source level to connect and whether or not to use the phantom power when the microphone input is selected. A-3506D/3512D/3524D/3548D (INPUT 2) (INPUT 1) Input sound source Switch position... -
Page 14: Connecting To The Emergency Control Output Terminal
Use this terminal when remotely controlling other equipment. This terminal is activated while the emergency broadcast is in progress from this unit. For cable wiring to the removable terminal plug, refer to p. 16. A-3506D/3512D/3524D/3548D To other equipment’s remote control input terminal Output specifications: Open collector output, withstand voltage: 30 V DC or less, current: 25 mA or less 7.5. -
Page 15: Connecting To The Control Input Terminal
7.6. Connecting to the Control Input Terminal Priority broadcast (see p. 20) can be controlled by inputting the contact signal to these terminals. For cable wiring to the removable terminal plug, refer to p. 16. A-3506D/3512D/3524D/3548D Input 1 Input 2 Input signal specifications: Short-circuit current: 10 mA or less, open voltage: 35 V DC or less 7.7. -
Page 16: Removable Terminal Plug Connection
7.8. Removable Terminal Plug Connection Step 1. Wiring the supplied removable terminal plug. [Recommended type of screwdriver ] 1-1. Loosen the terminal screws to insert the wire. 1-2. Tighten the terminal screws. Blade width* Ensure that the wire does not break free when pulled. -
Page 17: Settings
Set whether or not to use the front-mounted Zone selection buttons with Switch 1 of the DIP switch. Even when the Zone selection button is set to OFF, you can perform zone selection using the rear-mounted Zone control input terminal (see p. 14). A-3506D/3512D/3524D/3548D Switch 1 OFF: You can use the front-mounted Zone selection buttons. (Factory-preset) ON: You cannot use the front-mounted Zone selection buttons. -
Page 18: Broadcast Mode Setting For Input 1
8.4. Broadcast Mode Setting for Input 1 Set the broadcast mode for Input 1 with the Switch 5 of DIP switch. A-3506D/3512D/3524D/3548D Switch 5 OFF: Sets the broadcast mode for Input 1 to Priority broadcast (see p. 20). Sets the broadcast mode for Input 1 to Emergency broadcast (see p. 21). (Factory-preset) 9. -
Page 19: Installing To An Equipment Rack
When installing the unit to an equipment rack, remove the four plastic feet screwed on the unit’s base as shown below. Plastic foot A-3506D/3512D/3524D/3548D When installing the unit to an equipment rack, use the optional MB-25B Rack mounting bracket. CAUTION Rack-mounting screws are not supplied with the optional MB-25B Rack mounting bracket. -
Page 20: Priority Broadcast Function
13. PRIORITY BROADCAST FUNCTION 13.1. Priority Broadcast Priority broadcast function refers to a function that mutes the specific audio signal by means of the control signal or audio signal as a trigger when it is input. The priority broadcast to be made from this unit can be activated by way of the following 4 signals as triggers. •... -
Page 21: Emergency Broadcast
13.2. Emergency Broadcast You can set the Control input 1 to emergency broadcast activation. Use the rear-mounted DIP switch to make the setting. (See p. 18) When the emergency broadcast mode is set, the broadcast can be made at the maximum volume regardless of the setting position of the Master volume control knob.* Also, the sound characteristic is made flat regardless of the setting positions of the Treble control knob and the Bass control knob. -
Page 22: Factory-Preset Operation
13.5. Factory-preset Operation Shown below is the operation by the factory default. Notes • The audio detect function is set to "NOT USED." (See "Audio Detection Function Setting" on p. 17.) • The priority level is fixed, and cannot be changed. [Operation image] CLOSED Control input 1... -
Page 23: Operation When The Priority Broadcast Function Is Activated By Audio Detection
13.6. Operation When the Priority Broadcast Function Is Activated by Audio Detection To activate the priority broadcast at this unit by way of audio detection, change the setting using the rear- mounted DIP switch. (See "Audio Detection Function Setting" on p. 17.) Operation when power is ON differs from that when power is off. - Page 24 13.6.2. If the power is OFF while being energized Even when the power is OFF while being energized, it is kept ON as long as the control input is closed. While the power is ON, the priority-assigned audio signals are output according to the priority levels. The power is not turned ON even if there is an audio detection input while the power is OFF.
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Page 25: Block Diagram
14. BLOCK DIAGRAM... -
Page 26: Specifications
15. SPECIFICATIONS A-3506D A-3512D A-3524D A-3548D Power Source 100 to 240 V AC, 50/60 Hz Rated Output 60 W 120 W 240 W 480 W Power/Current 96 W 171 W 314 W 601 W Consumption (rated output), (rated output), (rated output),... -
Page 27: Accessories
A-3506D A-3512D A-3524D A-3548D Indicators LED level meter, Power indicator, Priority broadcast indicator, Emergency broadcast indicator, Thermal protection indicator, Overcurrent protection indicator, Zone indicator (1,2) Operating Temperature –10 to +40 °C Operating Humidity 85%RH or less (no condensation) Finish Panel: ABS resin, black... - Page 28 Traceability Information for Europe Manufacturer: Authorized representative: TOA Corporation TOA Electronics Europe GmbH 7-2-1, Minatojima-Nakamachi, Chuo-ku, Kobe, Hyogo, Suederstrasse 282, 20537 Hamburg, Japan Germany URL: https://www.toa.jp/ 133-02-00581-00...
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