A-503A / A-506A / A-512A Mixer / Amplifier Datasheet
This datasheet outlines the technical specifications, product variants, and deployment frameworks for the A-503A, A-506A, and A-512A Multi-Channel Mixer Amplifiers, TOA distributed and integrated exclusively by SKYRS Pakistan.
Product Overview
The A-503A, A-506A, and A-512A are commercial-grade, multi-input mixer power amplifiers engineered for high-reliability public address, background music routing, and localized paging grids. With three scalable power options, these systems are built to run continuously in institutional facilities, retail chains, factories, and corporate offices across Pakistan.
Technical Specifications
Models and Power Ratings:
A-503A: 30 Watts RMS Output
A-506A: 60 Watts RMS Output
A-512A: 120 Watts RMS Output
Amplifier Core: High-Efficiency, Low-Heat Generation Circuitry
Speaker Output Interface:
Constant Voltage Lines: 100V and 70V TOA distributed terminal blocks
Low Impedance: 4 to 16 Ohms direct terminal connection
Input Matrix Architecture:
3 x Balanced Microphone Inputs (6.35mm / XLR compatibility)
2 x Auxiliary (AUX) Stereo RCA Inputs
Signal Control: Front-panel independent input volume knobs, master volume control, and dedicated bass/treble tone adjusters.
Priority Muting: Voice-Activated (VOX) or dry contact-closure override on Microphone 1 that automatically ducks auxiliary audio streams during active announcements.
Protection Architecture: Comprehensive electronic protection against short circuits, open circuits, thermal overload, and output overcurrent.
Available Variants at SKYRS Pakistan
SKYRS builds, configures, and services three custom application-specific hardware variants for each model in the series:
Standard Desktop Variant (A-500A-ST Series)
Housed in a compact, standalone matte-black metal enclosure with anti-vibration rubber base pads. Ideal for receptionist desks, point-of-sale counters, and school administrative offices.
Rackmount Integration Variant (A-500A-RM Series)
Shipped with pre-fitted 2U industrial rack ears. Designed for clean, secure flush installation inside central 19-inch communication and network server racks.
Redundant DC Backup Variant (A-500A-DC Series)
Outfitted with an auxiliary 24V DC power input terminal alongside the standard AC mains cord. This configuration guarantees uninterrupted public address operations during localized electrical grid failures by instantly switching to backup batteries.
Deployment and Installation Services
Complete physical deployment, public address architecture layout, and line infrastructure matching are managed across Pakistan exclusively by certified SKYRS engineering teams.
Mounting and Environment Setup
Enclosure and Rack Integration: Slide-lock integration inside ventilated server racks, maintaining exact thermal budget clearances to prevent heat accumulation.
Cabling and Shielding: Strategic routing of low-smoke zero-halogen (LSZH) shielded mic lines away from high-voltage electrical mains to prevent 50Hz hum and electromagnetic cross-talk.
TOA Distributed Line Management
Constant Voltage Tapping: Precision calculation and tapping of 100V/70V ceiling speaker or horn arrays to balance total zoning wattages against the designated amplifier budget ($30\text{W}$, $60\text{W}$, or $120\text{W}$).
Loop Impedance Verification: Utilizing specialized audio load meters to verify total line impedance before system activation, protecting the output transformer from premature wear.
Configuration and Availability
Advanced system balancing, signal path optimization, and priority zoning configurations are available strictly through SKYRS technical teams. No third-party field maintenance or calibration is authorized.
Calibration Parameters Handled by SKYRS:
VOX Overriding Sensitivity Thresholds: Adjusting the internal attenuation trim pots so that Microphone 1 accurately overrides background audio without cutting off the speaker’s first words.
Phantom Power Allocation: Setting internal motherboard jumpers to safely deliver power to condenser paging microphones while isolating dynamic voice mics.
Acoustic Environmental Tuning: Measuring the venue’s local noise floor and modifying master tone profiles to minimize architectural booming and maximize speech intelligibility over high-ambient noise areas.
For corporate procurement, institutional tenders, or to schedule a localized system deployment matrix within Pakistan, contact the SKYRS systems integration office directly.
