The CX-PA1120 is an intelligent, network-enabled 120 W power amplifier integrated with a built-in 10-zone speaker selector. Purpose-built for TOA’s CX-1000 series IP communication platform, it decodes digital audio packets from network intercom stations or audio interfaces and distributes targeted high-voltage (100 V or 70 V) broadcasts across multiple zones. Its local flash memory supports standalone chime and emergency voice (EV) automation, maintaining vital local broadcast functionalities even during network server disconnections.
| Parameter | Specifications |
| Power Source | 100 – 240 V AC, 50/60 Hz |
| Rated Output | 120 W |
| Power Consumption | 180 W (at rated output), 55 W (based on EN62368 safety standard) |
| Audio Inputs |
2 Channels: • Channel 1: Selectable level (-60, -40, -20, or 0 dB), 10 kΩ, electronically balanced with +24 V phantom power. • Channel 2: Selectable level (-60 or 0 dB), 10 kΩ, electronically balanced. |
| Audio Outputs |
• Speaker Output: 10 channels, individually controllable, removable terminal blocks. • Recording Output: 1 channel, 0 dB, 10 kΩ, electronically balanced. |
| Output Voltage | 100 V or 70 V line (Switchable via hardware configuration toggle) |
| Frequency Response | 200 Hz – 16 kHz |
| Signal-to-Noise Ratio | 60 dB or greater |
| Distortion | 1% or less at 1 kHz (rated power, measured with 20 kHz low-pass filter) |
| Network Interface | Dual 100BASE-TX RJ45 ports (Supports full network path redundancy) |
| Network Protocols | TCP/IP, UDP, ARP, ICMP, HTTP, RTP, RTSP, IGMP, NTP, FTP, RSTP |
| Audio Codecs | PCM, G.722 (16-bit depth; 16 kHz / 48 kHz adjustable sampling rate) |
| DSP Pipelines |
• Input: Gain, 2-Band Parametric EQ, Compressor, AGC, Trim, Gate (VOX). • Output: Gain, 7-Band Parametric EQ, Ambient Noise Control (ANC). |
| Control I/O Matrix |
• Control Inputs: 10 channels, no-voltage make contact (24 V DC open voltage). • Control Outputs: 10 channels, robust relay contact (125 V AC / 24 V DC, 4.0 A max). |
| Emergency Override | 1 channel 24 V DC photo-coupler input for integration with fire alarms. |
| Local Operations | 10 Front-panel direct keys for manual zone allocation and macro triggers. |
| Dimensions & Weight | 420 (W) × 88.7 (H) × 326 (D) mm; 5.6 kg |
SKYRS stocks and services all hardware configurations of the CX-PA1120 power amplifier to suit commercial, industrial, and institutional infrastructure layouts across Pakistan (including major logistics rings in Karachi, Lahore, and Islamabad).
CX-PA1120-ST (Standard Desktop): Delivered as a self-contained tabletop unit fitted with non-slip high-friction plastic isolation feet. Perfect for smaller localized counter configurations or control desks.
CX-PA1120-RM (Rackmount Integration Kit): A bundle variant packaged alongside industrial-grade MB-25B rack ears, optimizing ventilation metrics within a standardized 19-inch 2U server enclosure spacing.
CX-PA1120-WM (Wall-Mount Variant): Shipped with high-tensile structural YC-850 wall-mounting brackets, ideal for tight operational environments or electrical vertical frame backboards.
To preserve system integrity and fulfill technical warranty metrics, deployment and maintenance protocols are handled exclusively by SKYRS engineering divisions within Pakistan.
Physical Assembly and Thermal Budgeting: Structural placement via rack alignment (2U standard footprints), secure wall fastening, or desktop configurations. Multi-unit arrays are deployed with active thermal spacing to guarantee uninterrupted airflow under heavy inductive speaker loads.
Acoustic and Field Transducer Wiring: Termination of high-voltage multi-zone public address speaker trunks (100 V or 70 V distribution networks) utilizing high-capacity, heavy-gauge multi-pin terminal arrays.
Ambient Noise Sensor Deployment: Provisioning and interfacing specialized ANC (Ambient Noise Control) monitoring microphones across areas prone to dynamic sound levels (such as airport lounges, industrial assembly lines, and transit hubs).
Fault Tolerant Networking: Dual Ethernet connectivity using separate routes to managed infrastructure switches, activating the system’s structural Rapid Spanning Tree Protocol (RSTP) network ring backup paths.
Matrix Routing and Multi-Zone Allocation: Soft-mapping network unicast and multicast IP routing addresses to direct page calls from specified remote consoles into exact speaker combinations among the 10 available zones.
DSP Optimization and Acoustic Tuning: Implementing software-driven 7-band equalizations to maximize voice clarity. Testing and configuring the voice-operated threshold gates (VOX) and automated gain curves.
ANC Calibration: Programming the internal Ambient Noise Control algorithms to measure local environment sound floors via sensor microphones, automatically modifying internal output gains to ensure clear, audible speech without causing distortion.
Emergency Override and Fail-Safe Routines: Calibrating the hardwired 24 V DC Emergency Cutoff inputs to drop civilian background music instantly and trigger high-priority EVAC alert macros stored in the device’s flash cache, bypassing server architectures during network losses.
