Mechanical Mounting and Orientation Setup
The Ahuja PS-400T compact 2-way PA wall speaker includes a dedicated movable mounting bracket engineered for secure surface mounting in commercial architectural environments. The bracket assembly supports installation in both vertical and horizontal orientations, allowing system integrators to adapt the acoustic projection based on ceiling heights, wall layouts, and aesthetic requirements across offices, banks, retail showrooms, and restaurants.
With physical cabinet dimensions of W133 × H187 × D107 mm, the compact form factor allows for unobtrusive placement along perimeter walls, structural pillars, and corners. The unit is housed in a weather-resistant white plastic cabinet, offering reliable durability in standard indoor zones and sheltered architectural spaces.
Rotary Switch Power Tapping and Impedance Selection
The PS-400T features an integrated rear-mounted rotary switch designed for rapid field adjustment of operating modes and power levels without requiring internal hardware modifications or soldering. System technicians can easily switch between standard distributed 100V constant-voltage operation and direct low-impedance mode.
- 100V Line Mode (16W Tap): Configures the speaker for maximum rated output (16W RMS / 24W Max) in higher ambient noise zones.
- 100V Line Mode (8W Tap): Provides intermediate acoustic output balanced for mid-sized zones and distributed sound paths.
- 100V Line Mode (4W Tap): Delivers lower acoustic output optimized for background music coverage in quiet, localized commercial spaces.
- 8-Ohm (8Ω) Low-Impedance Mode: Bypasses the 100V line-matching transformer to allow direct connection to conventional low-impedance commercial audio amplifiers.
Electrical Wiring and System Integration
When deploying the PS-400T on standard 100V distributed speaker lines, connect the line amplifier output to the designated speaker terminals, observing consistent polarity across all installed units. Multiple PS-400T units can be wired in parallel along the same 100V transmission run, provided the aggregate wattage tapped across all speakers does not exceed the total rated output capacity of the line amplifier.
When operating in the 8Ω direct mode, ensure the load impedance presented to the amplifier output matches amplifier stability limits, avoiding excessive parallel configurations that may drop below the amplifier's safe minimum impedance threshold.
Technical Installation Specifications
| Parameter | Specification / Value |
|---|---|
| Input Power Rating | 16W RMS / 24W Max |
| Operating Modes | 100V Constant Voltage / 8Ω Low Impedance |
| 100V Power Taps | 16W, 8W, 4W (Selectable via Rotary Switch) |
| Low Impedance Setting | 8Ω |
| Transducer Configuration | 95 mm (3¾”) Woofer + 13 mm Dome Tweeter |
| Frequency Response | 85 Hz – 20,000 Hz |
| Sensitivity (SPL at 1kHz, 1W/1m) | 86 dB |
| Enclosure Dimensions | W133 × H187 × D107 mm |
| Cabinet Construction | Weather-Resistant Plastic Cabinet (White) |
| Mounting Hardware | Movable Bracket (Vertical / Horizontal) |
