System Compatibility and Interface Integration

Audio Input and Source Device Compatibility

The Ahuja BTA-880 portable PA active trolley speaker system is engineered to interface with multiple analog audio sources, digital media formats, and wireless broadcast equipment. Its integrated mixer section accepts a versatile range of wired and wireless inputs, allowing direct connection without requiring external preamplifiers or standalone audio converters.

• Wired Microphones: Two independent dynamic microphone inputs rated at 3mV sensitivity with a 4.7kΩ input impedance.
• Auxiliary Analog Inputs: Dedicated 1 x Aux input and 1 x Music input, each rated at 100mV sensitivity and 47kΩ impedance, designed for line-level integration with laptops, external audio mixers, CD/media players, and analog playback equipment.
• Wireless Microphones: Factory-integrated dual-channel wireless receiver paired with two handheld wireless transmitters. Transmitters operate with an RF power output of 10 mW, frequency response of 50 Hz to 15,000 Hz, and frequency stability of ±0.005%, powered via 2 x 1.5V AA cells per transmitter.
• Digital Media & Streaming: Built-in digital audio player compatible with USB flash drives, SD/MMC memory cards, and wireless Bluetooth audio streaming from smartphones, tablets, and field computers, complemented by an IR remote control and direct audio recording capability.

Preamp Output and Downstream Hardware Integration

For large-scale industrial announcements, multi-zone installations, or documentation setups, the Ahuja BTA-880 provides a dedicated preamp line output rated at 200mV into a 600Ω load. This line-level output allows direct audio feed distribution downstream to secondary active PA speakers, slave amplifiers, outboard recording equipment, or commercial broadcasting systems without signal degradation.

The system features an automated Mic 1 voice priority circuit. When engaged, audio from Mic 1 automatically attenuates and overrides all auxiliary, music, and digital playback streams, ensuring safety announcements and priority briefings remain fully intelligible over background programming.

Electrical and Power Supply Compatibility

The unit features tri-mode power architecture designed for continuous facility use and remote site deployments:

• AC Mains Power: Standard AC 220V–240V at 50/60 Hz, drawing 60 VA power consumption, protected by a user-replaceable T 1A L 250V AC fuse.
• External DC Power: Direct connection terminals for external 12V DC power supplies, such as automotive or commercial lead-acid batteries.
• Internal Battery Operation: Built-in 12V 7Ah rechargeable battery supported by automatic low-battery cut-off circuitry to prevent deep-discharge cell damage.

Audio Interfacing Specifications