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TOA Electronics A-724 manual

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Table of contents for the manual

  • Page 1

    OPERA TING INSTRUCTIONS 700 SERIES AMPLIFIERS A-706, A-712, A-724 Thank you for purchasing TOA's 700 Series Amplifiers. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment. 1. IMPORTANT SAFETY INSTRUCTIONS ....................................................................................[...]

  • Page 2

    2 1. IMPORT ANT SAFETY INSTRUCTIONS • Read these instructions. • Keep these instructions. • Heed all warnings. • Follow all instructions. • Do not use this apparatus near water. • Clean only with dry cloth. • Do not block any ventilation openings. Install in accordance with the manufacture's instructions. • Do not install near [...]

  • Page 3

    3 surface. Doing so may result in the unit falling down, causing personal injury and/or property damage. 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 [...]

  • Page 4

    4 1 2 3 4 5 6 7 8 5. NOMENCLA TURE AND FUNCTIONS [Front] 1. Power switch [POWER] Press to turn ON the power. Press again to turn the power OFF. 2. Power indicator Lights green when the power is switched on. 3. Input 1 – 8 volume controls [INPUT 1 – 8] Adjust the corresponding input signal levels. Turn each control clockwise to increase and coun[...]

  • Page 5

    5 9 10 21 22 11 12 13 14 15 16 18 19 17 20 [Rear] 9. AC inlet Connect the supplied power cord. 10. Remote control connector Removable terminal block. (1) Remote volume control terminals [REMOTE VOLUME] Connecting a 10 k Ω linear taper volume control across these terminals will allow remote control of preamplifier output and speaker output levels.[...]

  • Page 6

    6 17. Module input slot Accepts TOA's 900 series module. 18. Functional ground terminal Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional ground terminal of the external equipment may reduce the hum noise. Note : This terminal is not for protective earth. 19. Speaker output [...]

  • Page 7

    7 Over 10 cm Over 10 cm Over 10 cm 7. INST ALLA TION To prevent the internal temperature rise, keep the unit at least 10 cm away from objects that may obstruct air flow. 6.5. External Equipment Connection to the PRE AMP OUT and PWR AMP IN T erminals A-700 series Equalizer , limiter , etc. PRE AMP OUT OUT IN PWR AMP IN By connecting a signal process[...]

  • Page 8

    8 8. RACK MOUNTING To mount the unit in a standard 19" equipment rack, use the optional MB-25B Rack Mounting Bracket. Attach the MB-25B to the unit using the supplied 4 screws. When using other screws, each screw must be shorter than 16 mm. MB-25B M4 x 16 Machine screw included in MB-25B 9. CONTROL SETTINGS Output levels are adjustable with in[...]

  • Page 9

    9 1 1. BLOCK DIAGRAM INPUT 1 LINE: – 10 dB/600 Ω MIC: – 70 to – 50 dB/600 Ω INPUT 2, 3 LINE: – 10 dB/600 Ω MIC: – 70 to – 50 dB/600 Ω INPUT 4 – 6 LINE: – 10 dB/600 Ω MIC: – 70 to – 50 dB/600 Ω INPUT 7, 8 – 10 dB/10 k Ω MODULE – 10 dB/10 k Ω MUTE CONTROL POWER REMOTE REMOTE VOLUME + – 120 V VCA TREBLE BASS T[...]

  • Page 10

    10 12. SPECIFICA TIONS [A-706] * 0 dB = 1 V Note: The design and specifications are subject to change without notice for improvement. • Accessories • Optional products AC power cord (2 m) ........................................ 1 Removable terminal plug (4 pins) .................... 1 Removable terminal plug (6 pins) .................... 1 Rem[...]

  • Page 11

    11 * 0 dB = 1 V Note: The design and specifications are subject to change without notice for improvement. • Accessories • Optional products AC power cord (2 m) ........................................ 1 Removable terminal plug (4 pins) .................... 1 Removable terminal plug (6 pins) .................... 1 Removable terminal plug (3 pins[...]

  • Page 12

    133-12-920-9A [A-724] Power Source 120 V AC, 60 Hz Rated Output 240 W Power/Current Consumption 565 W (rated output), 215 W (based on UL60065), under 60 mA (when power switch is OFF) Frequency Response 50 – 20,000 Hz (± 3 dB) Distortion Under 2% at 1 kHz, rated power Input INPUT 1 – 6: – 70 to – 50 dB*, 600 Ω (MIC)/ – 10 dB*, 600 Ω ([...]