Audio Production Equipment : Amplifiers (Audio) : Williams AV - OA-50

Ovation™ All-in-one Classroom Audio Amplifier

Model: OA-50

Noise-Free Multimedia with Anti-Hum. Eliminate the distracting “ground loop” buzz caused by charging laptops. Ovation includes a dedicated computer audio input with switchable Anti-Hum isolation, ensuring clean, noise-free audio for videos, presentations,
Hybrid Learning Ready with EchoGuard™. Prevent remote audio echo before it disrupts instruction. Video Conference Sync with EchoGuard™ automatically removes feedback loops by stopping remote students’ voices from being re-captured by classroom mics—provid
Integrated Safety & Paging. Ovation supports school-wide communication and safety systems by automatically muting audio inputs during Fire Alarms and Pages. Paging announcements also pass through to the Assistive Listening System (ALS) output so every stu
Crystal-Clear DECT Wireless. Operating on interference-resistant DECT frequency bands (1.92–1.93 GHz for North America and 1.88–1.90 GHz for international regions), Ovation ensures stable wireless performance and high speech intelligibility. Digital Feedb
Total Control & Classroom Connectivity. Designed for flexibility and future-proof integration, Ovation features four line-level inputs for interactive flat panels, computers, and media devices. RS-232 compatibility supports seamless third-party control. W

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Tech Specs

The Ovation™ OA-50 is an all-in-one classroom audio amplifier that combines a wireless receiver and mixer operating on the DECT 1.92–1.93 GHz frequency band used in North America. Designed to improve speech clarity and support inclusive learning, it integrates a wireless microphone receiver, audio mixer, and a 50-watt amplifier capable of driving up to four speakers for consistent room coverage.

It features Video Conference Sync with EchoGuard™, which eliminates audio feedback loops, ensuring clear, intelligible sound for both in-person and hybrid instruction. The OA-50 connects easily to classroom AV through four line-level inputs for laptops, displays, and media devices. Dedicated connections support assistive listening systems, paging, fire alarms, and teacher-initiated security alerts, making it a flexible hub for modern education learning environments.

Works with Ovation wireless pendent and handheld mics available separately and in systems.

Noise-Free Multimedia with Anti-Hum. Eliminate the distracting “ground loop” buzz caused by charging laptops. Ovation includes a dedicated computer audio input with switchable Anti-Hum isolation, ensuring clean, noise-free audio for videos, presentations,
Hybrid Learning Ready with EchoGuard™. Prevent remote audio echo before it disrupts instruction. Video Conference Sync with EchoGuard™ automatically removes feedback loops by stopping remote students’ voices from being re-captured by classroom mics—provid
Integrated Safety & Paging. Ovation supports school-wide communication and safety systems by automatically muting audio inputs during Fire Alarms and Pages. Paging announcements also pass through to the Assistive Listening System (ALS) output so every stu
Crystal-Clear DECT Wireless. Operating on interference-resistant DECT frequency bands (1.92–1.93 GHz for North America and 1.88–1.90 GHz for international regions), Ovation ensures stable wireless performance and high speech intelligibility. Digital Feedb
Total Control & Classroom Connectivity. Designed for flexibility and future-proof integration, Ovation features four line-level inputs for interactive flat panels, computers, and media devices. RS-232 compatibility supports seamless third-party control. W
Includes:
(1) Ovation Amplifier (OA-50)
(1) Power Supply
(1) Line Cord

Amplifier Type - Power Amplifier
Spec Sheet available - Yes
Warranty - Yes

Maximum Frequency Response (Bandwidth): 22 kHz
Maximum Frequency Response (Bandwidth): 22000 Hz
Minimum Frequency Response (Bandwidth): 15 Hz
Minimum Frequency Response (Bandwidth): 0.02 kHz
Certifications: FCC
Signal to Noise Ratio: 70 dB
Total Harmonic Distortion + Noise (THD+N): 0.10 %
Current Draw: 3.50 Amps
DC Voltage: 19 Volts
Depth: 1.75 in
Length: 8.50 in
Width: 7.50 in
Product Weight: 1.75 lbs
Color: White
Warranty (Length/Type): 5 Years
Receiver Input: DECT 6.0 Radio, 2 mic channels
Modulation: DQPSK (Differential Quadrature Phase Shift Keying)
Reception Frequencies: 1.92–1.93 GHz DECT 6.0 (North American Use)
Frequency Planning: Automatic; actively avoids interference for high-density use; 60 talk channels
Antennae Options: Full diversity; back panel or 10' extension with magnetic mount to remote external
Mic Pairing Controls: Front panel and remote, with optional OP-10 remote panel
Connectivity Coverage: 2,000 sq ft. (185 sq m)
Amplifier Output Power: 50 W RMS at 4ohms, 2 x 24.5 W channels
Line level inputs: 4: 3.5 mm
Anti-Hum Isolation Balun: Switchable (off/on) at the computer input
Equalization: 5-band, ±10 dB
Wired Mic Input: 1 aux input switchable to dynamic mic
Line Outputs: Conferencing :3.5 mm with gain control – front panel
Assistive Listening System: 3.5 mm with gain control – rear panel
Page Input: 2-pin phoenix; 4 V, 25 V or 70 V nominal; fully isolated
Page Input Sensitivity: 50 mV to 12.6V
VOIP Page Integration: Interfaces with all VOIP system at analog level with a highly sensitive low-power page interface
Security Alert: Contact closing/opening, 1 or 4 pulse selectable
Fire Alarm: Contact closure by fire panel mutes the audio
Charger Output: 5 VDC, 1 A, USB-A