The Ahuja ABA-4000 325W bi-amplified active loudspeaker is engineered with multi-format signal connectivity, allowing direct integration into live sound reinforcement architectures, touring PA systems, broadcast environments, and fixed installations. Featuring dedicated preamplification channels and balanced routing circuits, the loudspeaker interfaces seamlessly with professional mixing desks, line-level media players, stage instruments, and downstream audio equipment without requiring external matching transformers or direct injection (DI) boxes.
Input Stage and Source Device Compatibility
The unit features two independent input sections designed to accommodate a diverse spectrum of professional and consumer audio hardware:
- Input 1 (Balanced XLR Interface): Features a switchable sensitivity selector allowing operation at Microphone level (20 mV across a 3 kΩ input impedance) or Line level (775 mV across a 10 kΩ input impedance). It interfaces directly with balanced low-impedance dynamic vocal and instrument microphones, condenser microphones utilizing external inline phantom power supplies, active stage consoles, and front-of-house (FOH) matrix outputs.
- Input 2 (Line-Level 6.3 mm and Dual RCA Inputs): Equipped with a balanced 6.3 mm (1/4-inch) line jack rated at 250 mV / 20 kΩ for balanced electronic keyboards, synthesizers, drum machines, and sub-mixer stage sends. Additionally, an unbalanced dual RCA stereo pair rated at 250 mV (L&R) / 10 kΩ allows direct patching of consumer media players, professional DJ controllers, CD players, and laptop audio outputs.
Signal Routing, Line Output, and Daisy-Chaining
The ABA-4000 incorporates a balanced male XLR line output to facilitate downstream audio distribution and multi-cabinet array scaling. The rear panel provides a mechanical selector switch to configure the routing topology according to venue acoustics and workflow requirements:
- Loop Through Mode: Directly mirrors the signal present at Input 1 (at 20 mV or 775 mV), allowing clean pass-through routing to adjacent active speakers or external monitor wedges without introducing crosstalk from Input 2.
- Mixed Output Mode: Sums signals from both Input 1 and Input 2 into a single balanced 775 mV line-level output (1 kΩ source impedance), providing a composite feed to drive dedicated active subwoofers, secondary delay-fill active enclosures, multi-zone distribution amplifiers, or digital recording interfaces.
Interface Technical Specifications
| Port Designation | Connector Format | Signal Level | Impedance | Target Source / Destination |
|---|---|---|---|---|
| Input 1 (Mic Mode) | Balanced XLR | 20 mV | 3 kΩ | Dynamic microphones, preamplified sources |
| Input 1 (Line Mode) | Balanced XLR | 775 mV | 10 kΩ | Audio mixing desks, matrix processors |
| Input 2 (Line Jack) | Balanced 6.3 mm (1/4") | 250 mV | 20 kΩ | Stage keyboards, instruments, sub-mixers |
| Input 2 (RCA Aux) | Unbalanced Dual RCA | 250 mV (L&R) | 10 kΩ | DJ consoles, laptops, CD/media players |
| Line Output | Balanced XLR | Switchable (20 mV / 775 mV) | 1 kΩ (Mix Mode) | Active subwoofers, slave speakers, recorders |
Mounting and Power Infrastructure Interoperability
Acoustic and physical deployment is supported via an integrated pole-mount socket for elevated mounting on standard speaker stands, as well as an angled cabinet design allowing low-profile floor wedge placement for live stage foldback monitoring. Electrically, the internal 325W RMS bi-amplifier (275W Class H LF, 50W Class AB HF) operates on AC 220–240 V (50/60 Hz) mains or regulated generator power with 375 VA total power consumption, protected by an AC T 4A L line fuse and dual DC T 6A L rail fuses.
