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2. GENERAL DESCRIPTION
TOA's Basic PA Amplifiers A-1031, A-1061, and A-1121 are high cost-performance mixer power amplifiers suited for
broadcasting paging or background music in schools, offices, and shops.
3. FEATURES
• High durability, high reliability, and high cost performance.
• Three microphone inputs, two AUX inputs, and one recording output.
• Speaker outputs of constant voltage distribution system (100 V and 70 V) and low impedance (4 Ω).
• Operates on both AC and DC power.
• Muting function.
• Independent input volume controls and master volume control.
• Independent tone controls cut both high and low frequencies.
• Power voltage selector of 110 – 120 V or 220 – 240 VAC (LH version).
• MIC 1 input is a 5-pin DIN connector to provide muting control and phantom power for condenser microphones. (ER and
UK versions).
• Five-segment output level meter provides at-a-glance monitoring of output status.
• Current limiter circuitry protects transistors, and the thermal protection circuitry prevents a failure due to overheat.
4. PANEL FACILITIES
[Rear panel (AS version)][Front panel]
[Rear panel (LH version)]
[Rear panel (ER/UK versions)]
①②
③
⑥
⑧⑦⑤④ ⑭ ⑫⑬
⑨ ⑩ ⑮
⑪
⑰
⑲
⑭
⑫⑬
⑨ ⑩ ⑮
⑪
⑰
⑱
⑭ ⑫⑬
⑨ ⑩ ⑮
⑪
⑰
⑯
① Power on-off button
Power is switched on and off with each depression of
this button.
② Power indicator
Lights when power is switched on.
③ LED level meter
Lights when power is switched on, and indicates an
output level.
④ Microphone volume control
Adjusts the microphone volume gain.
⑤ AUX volume control
Adjusts the AUX volume gain.
⑥ Master volume control
Adjusts the overall signal gain.
⑦ Bass control
Adjusts bass response. The "0" position provides flat
audio response. Turning this control counter-clockwise
attenuates the bass response.
⑧ Treble control
Adjusts treble response. The "0" position provides flat
audio response. Turning this control counter-clockwise
attenuates the treble response.
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