TOA / A-3612D PA amplifier 120W

The A-3612D is a PA amplifier. It features four microphone inputs, three auxiliary inputs, and a two-zone selector. In addition to individual volume control for each input, it includes priority broadcasting, chime, signal processing, and status check functions.

This PA amplifier features four microphone inputs, three auxiliary inputs, and a built-in two-zone selector. In addition to individual volume control for each input, it includes priority broadcasting, chime, signal processing, and status check functions. It also employs a PFC (Power Frequency Control) circuit. Ideal for paging and background music broadcasting in schools, offices, supermarkets, and other similar settings.




■Power Supply

AC 100 V 50/60 Hz

■Rated Output

120 W

■Power Consumption/Current

175 W (at rated output), 48 W (according to the Electrical Appliances and Materials Safety Act), 200 mA or less (when power switch is OFF)

■Frequency Response

50 Hz to 20 kHz ±3 dB (at 1/8 rated output)

■Distortion

1% or less (at 1 kHz rated output), 20 kHz LPF (AUX-0025)

■Tone Adjustment

±10 dB or more at 100 Hz and 10 kHz

■S/N Ratio

Master Volume (Minimum): 88 dB or more

Master Volume (Maximum): 76 dB or more

INPUT 1-6: 55 dB or more

INPUT 7: 72 dB or higher

(JIS-A)

■Audio Input

INPUT 1, 2: -60 dB (*1) (Microphone) / -20 dB (*1) (Line) Switchable 600 Ω

Electronically balanced Detachable terminal block (3P)

*Microphone requires phantom power DC 24 V (ON/OFF switchable)

INPUT 3, 4: -60 dB (*1) 600 Ω Electronically balanced Detachable terminal block (3P)

*Phantom power DC 24 V (ON/OFF switchable)

INPUT 5, 6: Microphone (BUS1) / Line (BUS2) Switchable

Microphone: -60 dB (*1) 600 Ω Electronically balanced Detachable terminal block (3P)

Line: -20 dB (*1) 10 kΩ Unbalanced RCA pin jack x 2

INPUT 7: -20 dB (*1) 10 kΩ Unbalanced RCA pin jack x 2

Power Amplifier: 0 dB (*1) 600 Ω Unbalanced RCA pin jack

■Input Bus

INPUT 1-4: BUS1

INPUT 5, 6: BUS1/BUS2 switchable

INPUT 7: BUS2

■Audio Output

Speaker: Low impedance (4-16 Ω) / High impedance (Direct, ZONE 1/ZONE 2: 100 series / combined 83 Ω) Detachable terminal block (6P)

(ZONE 1/ZONE 2 are selectable, maximum 120 W per ZONE)

Recording: 0 dB (*1) 600 Ω Unbalanced RCA Pin Jack

Lines 1 & 2: 0 dB (*1) 600 Ω Unbalanced RCA Pin Jack (*Can be linked with zone selection)

■Control Input

4-channel voltage-free make contacts. Open circuit voltage: DC 35 V or less, short circuit current: 10 mA or less.

Detachable terminal block (4P)

Remote Volume: Detachable terminal block (4P)

Zone Control Input: Voltage-free make contact. Open circuit voltage: DC 35 V or less, short circuit current: 10 mA or less. Detachable terminal block (4P)

■Control Output

Remote Output: Open collector output. Withstand voltage: DC 30 V or less, allowable current: 25 mA or less. Detachable terminal block (4P)

Emergency Output: Open collector output. Withstand voltage: DC 30 V or less, allowable current: 25 mA or less. Detachable Terminal Block (4P)

Zone Control Output: Open Collector Output Withstand Voltage: DC 30 V or less, Allowable Current: 25 mA or less Detachable Terminal Block (4P)

■Chime

1 tone, 2 tones, ascending 4 tones, or no chime (selectable via switch)


Display

5-point LED level meter, power indicator light, network connection confirmation indicator light, priority broadcast indicator light, emergency broadcast indicator light, temperature protection indicator light, overcurrent protection indicator light, CPU operation indicator light, abnormality indicator light, zone 1 indicator light, zone 2 indicator light

■Operating Temperature Range

-10 ℃ to +40 ℃

■Operating Humidity Range

85 %RH or less (non-condensing)

■Finish

Panel: ABS resin, black (approximate Munsell N1.0 color)

Case: Surface-treated steel plate, black (approximate Munsell N1.0 color) painted

■Dimensions

420 (W) x 96.1 (H) x 313.1 (D) mm

■Weight

5 kg

■Accessories

Power cord (2 m)...1, Detachable terminal plug for audio input (3.81 mm, 3P)...6, Detachable terminal plug for control input/output (3.81 mm, 4P)...4, Detachable terminal plug for remote control (3.5 mm, 4P)...2, Detachable terminal plug for speaker output (5 mm, 6P)...1, Volume cover...4

■Optional accessories

Rack mount bracket: MB-23B

Ventilation panel PF-013B