Mixer Amplifier – BG-220
The TOA BG‑220 is a compact 20 W, three‑input mixer amplifier designed for background music (BGM) playback and general announcements in commercial environments such as bars, retail stores, and banquet rooms. With its MOH (Music‑on‑Hold) output, the BG‑220 can operate as part of a 2‑channel broadcast system when paired with optional booster amplifiers such as the BA‑235 (35 W) or BA‑260 (60 W).
Key Features
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Convenient Installation: All input and output connections use removable terminal blocks for quick setup and maintenance.
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Rear DIP Switch Configuration: Easily adjust features such as input assignment, muting behavior, and Mic/Line level selection.
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Three Line Inputs: Input 1 is Mic/Line selectable; Inputs 2 and 3 include both terminal block and RCA connections.
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Recessed Tone Controls: Bass and treble knobs are tamper‑proof to maintain consistent system performance.
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Auto/Manual Mute Function: Includes adjustable muting sensitivity for paging priority or signal‑triggered ducking.
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Zone 2 & MOH Support: Enables 2‑channel broadcast and expansion when used with BA‑200 Series booster amplifiers.
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Flexible Routing: Any of the three inputs can be assigned to the MOH/Zone 2 output.
Specifications
Power
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Power Source: 120 V AC, 60 Hz
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Rated Output: 20 W
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Power Consumption: 60 W (rated output), 36 W (cULus)
Audio Performance
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Frequency Response: 50 Hz – 20 kHz
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Total Harmonic Distortion: 0.5% or less at 1 kHz (rated output)
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Tone Control: Bass ±10 dB at 100 Hz; Treble ±10 dB at 10 kHz
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Signal‑to‑Noise Ratio:
- Mic/Line 1: 60 dB or more
- Line 2 & 3: 80 dB or more
- (20 Hz – 20 kHz, tone controls centered)
Inputs
- Mic / Line 1: –60 dB (Mic) / –10 dB (Line), 600 Ω, electronically balanced,
removable terminal block; Mic/Line selectable. - Line 2 & Line 3: –10 dB, 10 kΩ, unbalanced,
removable terminal block or RCA jack.
Outputs
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Speaker Output: 4 Ω, 25 V (31 Ω), 70 V (245 Ω), balanced, removable terminal block
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MOH Output: 0 dB, 600 Ω, balanced, removable terminal block
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Line Output: 0 dB, 600 Ω, unbalanced, removable terminal block
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Output Regulation: 2 dB or less (no load to full load at 1 kHz)
Muting
- Manual mute
- Automatic mute with adjustable sensitivity
Controls
- Mic/Line 1 gain control
- Line 2 gain control
- Line 3 gain control
- Bass tone control
- Treble tone control
- MOH output gain control
- Manual mute switch
- Mute sense control
- Auto mute switch (Mic/Line 1)
- Mic/Line 1 selector switch
- Mute receive switch (Line 2, Line 3)
- MOH assign switch (Mic/Line 1, Line 2, Line 3)
- Power ON/OFF switch
Indicators
- Power LED
- Signal LED
- Peak LED
Environmental
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Operating Temperature: 0°C to +35°C (32°F to 95°F)
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Operating Humidity: 35% to 80% RH (no condensation)
Construction
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Panel: ABS resin, black
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Case: Steel plate, black, paint finish
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Dimensions: 210 (W) × 94.3 (H) × 265 (D) mm (8.27 × 3.71 × 10.43")
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Weight: 3.5 kg (7.72 lb)
Included Accessories
- Volume control cover: YA‑920 × 3
- Removable terminal plug (2‑pin) × 3
- Removable terminal plug (3‑pin) × 1
- Removable terminal plug (4‑pin) × 1
- Removable terminal plug (5‑pin) × 1
