• Radio based wireless receiver (DECT), audio mixer, and integrated audio amplifier.
• Auto-reconnect when mics move out of range then return to in-range.
• Supports remote external antennae for enhanced coverage, remote mounting.
• 2 wireless microphone channels plus a 3rd wired microphone support.
• Powers 4 x 8 Ω classroom speakers.
• Video Conference Sync w/ EchoGuard™.
  • > Front panel“ Conference” input & output: connects to host computer to synchronize classroom audio w/ video conference application. 3.5mm or USB audio interface with additional adapter.
  • > EchoGuard™ prevents remote audio from being looped back into conference audio.
  • EchoGuard can be turned on or off by selector switch.
• 4 line inputs:
  • > Rear panel: 3.5 mm auxiliary input (mic or line level switch) | Rear panel: 3.5mm input | Rear panel: 3.5 mm computer input w/ anti-hum (On/Off switch) | Front panel: 3.5 mm auxiliary (Conference) input.
• Assistive Listening System (ALS) output with level control on rear panel (3.5mm).
• Connection to building paging system.
  • Mutes all audio inputs to allow page to be heard (Page Muting).
  • Passes page signal to classroom speakers (Page Pass Through). Note: not intended as a life safety audio transmission feature.
  • Pass through feature can be turned on or off by selector switch.
  • Pages pass through to Assistive Listening System and Conferencing outputs (** important for those listeners **).
  • Most open and flexible system available. VOIP, 25V, 70V
• OA-50 supports teacher security alerting function from wireless microphone (OM-10).
• Remote teacher control over line input volume (control from teacher microphone).
• Fire Alarm connection: mutes all audio sources when fire alarm sounds.
• Controllable by TeachLogic or any third-party RS-232 devices for all input levels (volume up, down, and mute)
• Digital Feedback Guard (DFG): reduces any chance for audio feedback.
• Low-power standby mode (both automatic and manual activation

FRONT PANEL

Front of OA-50 receiver/amplifier

1. Power Button Logo Indicator Light
2. MIC A Microphone Volume Control
3. MIC A Pairing Button and Indicator Light
4. MIC B Microphone Volume Control
5. MIC B Pairing Button and Indicator Light
6. DVD Input Volume Control

7. Computer Input Volume Control
8. Aux Input Volume Control
9. Video Conference Input Volume Control
10. Video Conference Input Port (3.5 mm)(Also suitable for Aux audio source)
11. Video Conference Output Volume Control
12. Video Conference Output Port (3.5 mm)(Also suitable for Lesson Capture)

REAR PANEL

Back of OA-50 receiver/amplifier

1. Speaker Output
2. Fire Alarm Mute Input
3. Page Input
4. Page Sensitivity Control
5. Page Input Voltage Selector
6. ALS Output (3.5 mm) & Gain Control
7. Five Band Equalizer Controls
8. RS-232 Input & OFF/ON Switch

9. Security Alert Interface
10. Aux Input Port (3.5 mm) & Aux Mic/Line Input Level Selector; Mic: -40dB/Line: -10dB
11. Computer Input Port (3.5 mm) / Computer Anti-Hum ON/OFF Switch
12. DVD Input Ports (3.5 mm)
13. External Pairing Control for OP-10 Wall Mount Control Panel
14. 5 Volt USB Output for chargers
15. Power Input: 19 VDC, 3.5 A