Centralized Campus Administration and Principal-to-Classroom Intercom
The Hitune Bass SBS-20 operates primarily as a central command station within school administrative offices, headmaster cabins, or campus control centers. Designed with 20 distinct communication zones, the master console enables administrators to establish two-way audio links with specific rooms without disturbing adjacent classes. In typical daily administrative operations, office personnel select a single zone to verify attendance, request student dispatches, or relay instructional instructions directly to an individual classroom speaker station.
Audio clarity is maintained through the console's integrated electret gooseneck microphone, which features an input sensitivity of 2.1 mV/Pa and operates within an audio frequency response band of 50 Hz to 18,000 Hz. When speaking to a selected station, visual confirmation is provided on the front control panel by the active Talk LED indicator, confirming clear transmission along the assigned channel line.
Campus-Wide Emergency Paging via All-Call Broadcast
For urgent operational announcements, morning assemblies, routine period changes, or emergency notifications, the SBS-20 console provides an instantaneous All Call master switch. Engaging this switch bypasses individual zone selections and broadcasts high-intelligibility audio across all 20 connected classroom speakers simultaneously.
Because institutional installations require continuous operational readiness even during power fluctuations, the master unit supports dual power connectivity. It operates on standard 230V AC mains during routine conditions and can seamlessly transition to a 12V DC auxiliary power source during grid outages, ensuring emergency announcements remain active across educational facilities.
Classroom-Initiated Intercom and Audio Monitoring
Unlike unidirectional public address consoles, the SBS-20 serves as a true two-way talkback hub. In institutional environments where remote classrooms require immediate contact with the central administration, teaching staff can initiate incoming inquiries to the master desk:
- Audible and Visual Signalling: When a remote classroom initiates a call, the master console alerts desk personnel via an audible Return Call Bell accompanied by an illuminated Call Return LED corresponding to the calling station.
- Direct Talkback Reception: Central operators can immediately open the channel to listen to the instructor's report or question using the console's integrated monitor speaker.
- Audio Level Adjustment: Desk operators can fine-tune incoming audio intelligibility using the dedicated rotary monitor speaker volume control knob on the metal front panel.
- Secondary Microphone Integration: For installations where desk space dictates alternate microphone placement, an optional rear-panel socket allows the attachment of an external microphone alongside the primary electret gooseneck unit.
Distributed 100V Line-Matching Institutional Architectures
In multi-floor or dispersed school campus buildings, signal attenuation over long cable distances is mitigated by the console's 100V line-matching speaker distribution architecture. System integrators pair the SBS-20 master station with external PA power amplifiers sized specifically to the total quantity and wattage ratings of the connected classroom speakers. This configuration makes the system well-suited for medium-scale institutions including primary schools, secondary academic complexes, technical training institutes, and multi-room coaching academies requiring robust 20-channel communication housed within a durable metal enclosure.
