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A more flexible range of mixer amplifiers than TOA’s basic A-1000 series, the A-1700 series are aimed at PA applications that require versatility. Designed to satisfy the multi-microphone public address requirements of environments such as places of worship and meeting halls, they offer more advanced facilities. The models feature balanced inputs and phantom power and simple remote control. Speaker outputs are to two zones, and offer 100V line or low impedance connection. Power is AC only.

The front panel has level controls for four microphone inputs, two inputs which are user assigned to either mic or auxiliary, and three auxiliary inputs. There are bass and treble adjustments, master volume, LED level display and power switch with LED. Two switches select which zones are in use.

The rear has IEC power inlet; loudspeaker outputs using M4 screws; connectors for inputs, external equaliser and record outputs. A further terminal block connects remote control of volume, and power on/off. Microphones 1- 4, Aux1/Mic5, Aux2/Mic6, Aux 5 (mono) are connected using connectors combining XLR3 and 3-pole jack sockets. A miniature (DIP) switch provides for the selection of microphone or auxiliary for two inputs, Aux1/Mic5 and Aux2/Mic6, as well as selecting phantom power for microphone inputs 1 to 6. Aux 3 and Aux4 inputs feature dual connectors, mixing dual channel sources to mono. The record output also has dual connectors to feed both channels of a stereo recording device. The line out and power amp inputs are single, intended to feed additional power amplifiers, or the insertion of equalisers, delay lines, or feedback reducers.

Technical Specification:
Mic inputs: -60dBV, balanced, for low impedance mic, XLR3/three-pole 6.35mm jack
Aux1,2 inputs: -20dBV, balanced, XLR3/three-pole 6.35mm jack
Aux3,4 inputs(1): -20dBV, unbalanced, dual RCA (phono)
Aux5 input: -20dBV, balanced, XLR3/three-pole 6.35mm jack
Power amp input: 0dBV, unbalanced, RCA (phono)
Frequency response: 50-20,000Hz, +/- 3dB
Distortion: Less than 2% at 1kHz, rated power
Signal to noise: Better than 100dB, master volume shut. Better than 76dB; master volume fully open; all input volumes shut. Better than 60dB; Mic 1-4. Better than 76dB; Aux 1-5
Tone controls: Bass; +/-10dB, 100Hz. Treble; +/-10dB, 10kHz
Recording output: 0dBV, unbalanced, dual RCA (phono) connectors
Line output: 0dBV, unbalanced, RCA (phono) connector
Control input: Power remote; closing contact switches unit on, 24V DC, 10mA
Speaker outputs: Zone 1: 100V line; zone 2: 100V line; direct: 100V line, 4ohm, balanced
Model: A1706 A1712 A1724
Power output(2) : 60W 120W 240W
Power source: 220-230V AC, 50/60Hz    
Power consumption(3) : 150W 258W 532W
Environment: -10 to +40°C    
Dimensions: 420(w) x 107.7(h) x 367(d) mm    
Weight: 9.3kg 12.6kg 13.5kg

Notes: (1) When using both inputs; (2) rated; (3) at rated power.

Included accessories: AC cordset with UK 13A plug, terminal block cover.
Optional accessories: Rack mounting bracket MB-25B; volume control cover YA-920 is a pack of eleven covers which will clip into the aperture on the front panel after removing a level or tone control control knob.

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TOA A-1706 MIXER AMPLIFIER 60W/4, 100V. AC power, 2 zone, rackmountable with MB-25B   Stock code: 93-045
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TOA A-1712 MIXER AMPLIFIER 120W/4, 100V. AC power, 2 zone, rackmountable with MB-25B   Stock code: 93-046
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TOA A-1724 MIXER AMPLIFIER 240W/4, 100V. AC power, 2 zone, rackmountable with MB-25B   Stock code: 93-047
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TOA MB-25B RACKMOUNT BRACKET 2U, for 1000, 1700, 1800 series mixer amplifier, P-1812, pair   Stock code: 93-044
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TOA YA-920 CONTROL COVER For 1700, 1800 series mixer amplifier, set of 11   Stock code: 93-048
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