The TOA B-21S Balanced Line Input Module is a high-performance audio solution for balanced and unbalanced line-level sources such as AM/FM tuners, tape decks, and CD players. Its transformer isolation effectively prevents ground loop interference, delivering clean, noise-free audio signals for professional installations.
Designed with remote volume control, the B-21S allows precise adjustment of the input signal via an external potentiometer. This feature provides flexible, user-friendly control over audio levels, making it ideal for paging systems, background music distribution, and AV integration.
Compact and robust, the B-21S enhances sound clarity and system versatility in both commercial and professional audio environments.
Key Features
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Balanced and unbalanced line-level input module
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Transformer isolation to prevent ground loop noise
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Remote volume control via external potentiometer
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Ideal for AM/FM tuners, CD players, and tape decks
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Ensures clean, high-fidelity audio signal transmission
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Enhances flexibility in professional paging and AV systems
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Compact design for easy installation in racks or modules
Applications
The TOA B-21S is suitable for a wide range of professional audio setups:
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Corporate paging and announcement systems
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Educational institutions and training facilities
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Retail and commercial audio environments
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Multi-zone background music systems
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Recording and broadcast studios
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Integration with line-level audio sources requiring remote adjustment
Technical Specifications
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Model: TOA B-21S
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Input Type: Balanced / Unbalanced line-level sources
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Isolation: Transformer isolation for ground loop prevention
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Volume Control: Remote via external potentiometer
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Applications: Paging, background music, audio integration
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Mounting: Rack-mountable or module installation
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Compatibility: AM/FM tuners, CD players, tape decks, other line-level sources
Why Choose TOA B-21S?
The B-21S combines clean signal transmission, transformer isolation, and remote volume control, making it an essential component for professional audio integrators. Its reliable performance, noise prevention, and flexible level adjustment ensure high-quality audio in corporate, commercial, and institutional environments.
