The Ahuja TZA-2000 2-Zone PA Mixer Amplifier (KT reference KTI140020012JAM) is engineered to interface directly with industrial, institutional, and commercial sound distribution equipment. Its electrical design accommodates a wide variety of audio transducers, balanced and unbalanced signal sources, distributed transformer speaker networks, and external booster amplification stages across two independently switchable output zones.
Audio Source and Transducer Input Compatibility
The mixer section is equipped with nine dedicated audio input connection points configured to support both vocal microphones and line-level auxiliary audio feeds:
- Microphone Inputs: Six mono microphone channels rated at 0.6mV sensitivity with a 4.7kΩ input impedance, designed for standard dynamic public address microphones across speech reproduction systems.
- Auxiliary Inputs: Two high-impedance auxiliary line inputs rated at 100mV sensitivity and 470kΩ input impedance for connection to background music players, tone generators, message repeaters, or automation alert interfaces.
- Stereo Input: One dedicated Stereo L/R input channel rated at 250mV sensitivity and 47kΩ input impedance for integrating stereo media players, CD players, or dual-channel preamplified broadcast mixers.
The front-end processing stage supports acoustic equalization across all connected inputs via integrated bass (±10dB at 100Hz) and treble (±10dB at 10kHz) controls, operating across a system frequency response of 50Hz to 15,000Hz ±3dB with a 60dB signal-to-noise ratio.
Speaker Load and Distribution Zone Configurations
The amplifier features independent Zone 1 and Zone 2 speaker output terminals, allowing flexible pairing with low-impedance or high-impedance distributed speaker lines. The system delivers up to 130W + 130W Max (100W + 100W RMS at 10% THD, 90W + 90W RMS at 5% THD, or 80W + 80W RMS at 2% THD) with voltage regulation of ≤ 2 dB from no load to full load at 1kHz. Supported speaker routing configurations include:
- Dual 100V Line Distribution: Connecting both Zone 1 and Zone 2 to 100V line matching transformer (LMT) ceiling, horn, or column speakers for broad multi-room coverage.
- Hybrid Output Matching: Connecting one zone to a 100V or 70V constant-voltage line matching network while running the alternate zone on a low-impedance 4Ω or 8Ω speaker configuration.
- Dual Low-Impedance Setup: Connecting both Zone 1 and Zone 2 to dedicated low-impedance 4Ω or 8Ω speaker arrays.
- Independent Zone Switching: Dedicated front-panel Zone On/Off switches allow facility managers to selectively isolate or activate speaker lines without altering global gain settings.
Line-Level Output and Booster Interfacing
For large facilities requiring secondary amplification, recording, or audio logging, the Ahuja TZA-2000 provides two line-level output taps:
- Preamp Output: Rated at 200mV into 600Ω for direct connection to signal processing hardware or mixing consoles.
- Line Output: Rated at 1V into 1kΩ for daisy-chaining auxiliary slave amplifiers or booster amplifiers without loading the internal power stages.
Power Infrastructure and DC Backup Compatibility
The system is compatible with standard utility AC mains and auxiliary DC battery backup configurations. It operates from a 220–240V AC (50/60Hz) line input drawing 420VA. For critical uninterrupted public address installations, the amplifier includes terminal connections for 24V DC operation using two 12V external car batteries (they are not included), drawing up to 6.5A DC. The internal power supply features automatic instant transfer to the 24V DC battery backup (they are not included) during AC mains power failure, supported by accessible rear-panel DC protection fuses.
Input and Output Electrical Compatibility Summary
| Interface Port | Input / Output Level | Rated Impedance / Load | Compatible Peripheral |
|---|
| Mic 1 to Mic 6 | 0.6 mV | 4.7 kΩ | Dynamic PA microphones |
| Aux 1 & Aux 2 | 100 mV | 470 kΩ | Line-level players & audio sources |
| Stereo L/R | 250 mV | 47 kΩ | Media players, playback consoles |
| Preamp Output | 200 mV | 600 Ω | External audio processing / mixers |
| Line Output | 1 V | 1 kΩ | Booster and slave amplifiers |
| Speaker Taps (Per Zone) | Low Impedance / 70V / 100V | 4 Ω, 8 Ω, 70V, 100V | LMT ceiling speakers, horns, 4/8Ω cabs |
| DC Power Input | 24V DC (6.5A) | 2 × 12V external batteries (they are not included) | 24V backup battery banks (they are not included) |
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