The Ahuja SSA-160EM medium wattage PA mixer amplifier (KT reference KTI14002001PS160) is engineered for broad integration across commercial, institutional, and industrial public address installations. It accommodates multi-channel signal routing, direct speaker line distribution, and upstream audio mixing infrastructure through standard impedance-matched interfaces.
Audio Input Compatibility
The unit features multiple concurrent input channels configured to interface with standard professional and industrial sound sources without requiring external matching transformers:
- Microphone Inputs: Five independent dynamic microphone input channels rated at 0.65mV sensitivity across an input impedance of 4.7kΩ, suitable for standard low-impedance dynamic microphones.
- Auxiliary Inputs: Two auxiliary input channels rated at 100mV sensitivity across 470kΩ impedance, designed for line-level peripheral playback equipment and media players.
- Line Input: One dedicated line input channel rated at 1V sensitivity across 50kΩ impedance. This input accepts direct feeds from external mixing consoles, audio matrix switchers, or digital signal processors (DSP). When driven via this line input, the SSA-160EM operates directly as a booster power amplifier.
Audio Preamp and Line Interconnection
For modular public address expansions and system monitoring, the SSA-160EM provides two dedicated audio output interconnects:
- Preamp Output: Rated at 200mV across 600Ω impedance, intended for signal chaining to external processing gear or sub-mixing networks.
- Line Output: Rated at 1V across 1kΩ impedance, enabling direct audio loop-through to secondary booster power amplifiers for multi-zone distribution or routing to external programme recording hardware.
Loudspeaker Load and Distribution Compatibility
The amplifier is built to drive both direct low-impedance speaker arrays and distributed constant-voltage commercial sound networks. Output regulation is tightly maintained at ≤ 2 dB from no load to full load at 1kHz.
- Low-Impedance Taps: Direct connections are available for 4Ω and 8Ω speaker loads, delivering maximum acoustic output for localized, high-fidelity sound reinforcement.
- Constant-Voltage Line Outputs: Equipped with 70V and 100V distributed line output taps. These outputs allow long-distance cable runs with step-down line transformers installed at each loudspeaker location, reducing line transmission losses across large facilities.
- Driver Unit Protection: A built-in Box Speaker/Driver Unit selector switch alters output filtering. Selecting the Driver Unit setting defeats bass boost (normal bass adjustment range: ±10dB at 100Hz) to safeguard acoustic horn driver units from damaging low-frequency over-excursion.
Power Infrastructure and Backup Compatibility
The SSA-160EM operates on standard alternating current networks and includes seamless DC backup integration:
- AC Mains Power: Compatible with standard AC 220–240V supply lines at 50/60Hz, with a total power consumption rating of 300VA.
- DC Emergency Operation: Equipped with terminals for 24V DC input (configured using two 12V car batteries (they are not included)). In the event of an AC utility power failure, the unit performs an instantaneous automatic transfer to the connected 24V DC battery supply (they are not included), drawing up to 4A under operational load.
- Circuit Protection: A built-in resettable circuit breaker protects against output load faults and line short circuits, allowing manual reset once downstream line anomalies are resolved.
