EV-20A Digital Sound Repeater Datasheet
The EV-20A is a self-contained, fully digital audio playback and message-repeating instrument engineered for automated public notification, informational exhibits, retail advertising, and sensor-activated announcements. Free of internal moving components to eliminate wear and tear over extended deployment lifecycles, the unit combines high-fidelity, CD-quality digital memory storage with a built-in power amplifier and a high-accuracy infrared motion sensor for automated, unattended playback.
Available Variants for SKYRS Pakistan
To integrate seamlessly with various safety, retail, and commercial infrastructures across domestic regions such as Karachi, Lahore, Islamabad, and Faisalabad, the EV-20A platform is supplied through SKYRS in the following configurations:
EV-20A Standard Sensor-Integrated Variant: Featuring an integrated electret condenser microphone and a passive infrared (PIR) motion sensor on the front bezel (3.0-meter detection range). Finished in a silver ABS resin case, it is ideal for commercial kiosks and museum exhibit guidance.
EV-20A Industrial Multi-Message Variant: Optimized without the front sensor assembly for direct integration into electrical control panels or public address equipment racks. It relies strictly on dry-contact back-end triggers to automate recurring factory alerts or facility safety chimes.
EV-20A DC-Low Power Variant: Outfitted with specialized low-draw 12V–24V DC circuitry, optimized for mobile deployment, remote security checkpoints, or solar-powered municipal announcement grids.
Technical Specifications
Audio Storage Capacity: Up to 4 channels (2 dedicated voice messages and 2 background music selections).
Maximum Recording Limit: Approximately 6 minutes total recording capacity via upgraded storage architecture.
Digital Codec Format: High-resolution 44.1 kHz sampling frequency, 16-bit uncompressed PCM monaural WAV architecture.
Acoustic Transducer: Integrated internal 8 cm cone-type monitoring speaker.
Power Output Profile: 3 Watts rated / 10 Watts maximum peak output via external low-impedance terminal lines.
Frequency Response Range: Tailored vocal curve spanning 200 Hz to 10,000 Hz for optimized speech intelligibility.
Total Harmonic Distortion (THD): Under 1.0% at rated output (1 kHz reference).
External Interface Nodes: * 1x External Mic/Line switchable input (3.5mm mini-jack)
1x Terminal Block Activation Input (No-voltage make contact system, 200ms trigger)
1x Type-B USB Interface for high-speed PC media transmission
Programmable Playback Intervals: Selectable cycle repeat intervals ($\infty$, 0s, 5s, 10s, 30s, 1 min, 5 min, 10 min, 30 min, or 1 hour).
Physical Profile Dimensions: 144 (W) × 195 (H) × 101 (D) mm.
Total Unit Mass: 850 grams (dry structural weight).
Deployment, Installation, and Configuration
Exclusive Turnkey Provisioning via SKYRS
Hardware allocation, precision architectural mounting, software programming, and system interfacing for the EV-20A Digital Sound Repeater are available exclusively through SKYRS across Pakistan.
Strategic Fleet Deployment: Planning automated audio integration arrays for public transit terminals, high-traffic retail storefronts, historical museum exhibits, and emergency assembly zones.
Hardware Installation: Rigid physical mounting utilizing specialized C-BC31 brackets for precise wall or ceiling angling. SKYRS teams secure all operational interfaces, wire custom terminal connections to external triggering switches, and manage clean cable pathways.
System Configuration: Uploading customized WAV files via localized USB software links, assigning priority playback ranks across the 4 memory channels, dialing in independent message vs. BGM volume levels, and precision-tuning the front-facing infrared sensor thresholds to eliminate false activation loops from environmental changes.
