Input Source Compatibility
The Hitune HSSB-60EM Public Address mixer amplifier interfaces with low-impedance dynamic microphones and line-level auxiliary audio equipment. The front input panel accommodates up to four balanced or unbalanced dynamic microphones through dedicated 6.5 mm audio jacks, rated at an input sensitivity of 0.65 mV across an input impedance of 4.7 kΩ. This input stage accommodates paging microphones, handheld announcements, and podium-mounted voice transducers commonly specified in industrial audio networks.
In addition to microphone-level signaling, the unit features an auxiliary input channel rated at 100 mV sensitivity with a 470 kΩ input impedance. This high-impedance line channel enables direct connectivity to commercial background audio players, tone generators, media players, and automation signaling modules without requiring dedicated impedance-matching line transformers.
Loudspeaker Load and Distribution Compatibility
The amplifier is engineered to drive both low-impedance localized loudspeaker networks and high-voltage distributed speaker topologies. Output impedance taps on the rear termination strip match direct coil voice-coil circuits as well as step-down transformer lines:
- 4 Ω Low-Impedance Tap: Matches standard 4-ohm driver loads or parallel configurations of multiple 8-ohm voice coils within short-run wiring installations.
- 8 Ω Low-Impedance Tap: Directly compatible with standard commercial box speakers, sound columns, and industrial horn drivers without line-matching transformers.
- 16 Ω Low-Impedance Tap: Supports extended multi-speaker parallel/series hookups or dedicated 16-ohm high-efficiency sound projectors.
- 100V High-Impedance Line: Designed for constant-voltage public address runs incorporating line-matching transformers (LMT). This output enables extended cable routes across commercial facilities, distribution warehouses, schools, and places of worship with minimal cable signal loss.
Signal Expansion and Downstream Equipment Integration
For modular audio scaling and recording compliance, the HSSB-60EM features an integrated pre-amplifier line-level output terminal delivering 200 mV at 600 Ω impedance. This output facilitates continuous signal pass-through to downstream equipment without loading the input preamplifier stage:
| Interface Connection | Electrical Parameters | Compatible Equipment Type |
|---|---|---|
| Microphone Inputs (4 Ports) | 0.65 mV / 4.7 kΩ (6.5 mm jack) | Dynamic wired microphones, desktop paging mics |
| Auxiliary Input (1 Port) | 100 mV / 470 kΩ | Media players, automation signalers, playback decks |
| Pre-Amplifier Output | 200 mV / 600 Ω | Booster power amplifiers, external audio logging recorders |
| Speaker Terminals | 4 Ω, 8 Ω, 16 Ω & 100V line | Passive horn speakers, sound columns, 100V ceiling speakers |
Electrical Supply and Backup Power Compatibility
Operating flexibility is supported through dual-voltage electrical supply compatibility. The primary internal power supply connects to standard 220–240V AC mains at 50/60 Hz, drawing 160 VA under normal operating conditions. For mission-critical emergency communication or mobile PA configurations, the chassis integrates external 12V DC terminals drawing 3A.
The internal circuitry includes an instant automatic transfer circuit that switches operation to an external 12V DC source, such as a 12V car battery (it is not included), immediately upon the loss of AC line voltage. This guarantees uninterrupted voice paging and security announcements across industrial sites during sudden AC utility outages.
