OSD Audio PAX-50 50W 70-Volt Commercial Mixer Amplifier
The OSD PAX-50 50W 70-Volt Commercial Mixer Amplifier is a compact, high-efficiency Class-D commercial audio amplifier engineered for restaurants, retail storefronts, corporate offices, medical clinics, and educational facilities. Delivering 50 watts RMS across 70-Volt, 25-Volt, and 4-16 Ohm speaker runs, the PAX-50 features dual RCA background music inputs, a dedicated 1/4-inch microphone input with voice-activated priority ducking, telephone paging terminals, and independent front-panel volume and tone controls.
If you want to know what commercial 70-Volt amplifier powers distributed in-ceiling and surface-mount speakers with clear microphone paging and background music, how VOX priority ducking automatically lowers music volume during staff announcements, or how 70V and 25V taps simplify wiring multiple speakers across large commercial spaces, the OSD PAX-50 provides the ultimate high-reliability solution. Contractors and business owners choose the PAX-50 for its bulletproof durability, intuitive operation, and compact half-rack footprint.
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Class-D 50W Commercial 70-Volt / 25-Volt Power
Engineered for retail stores, restaurants, offices, schools, and professional commercial spaces, the PAX-50 delivers 50W RMS of clean Class-D power to 70V and 25V distributed speaker lines or 4-16 ohm low-impedance systems.
Multi-Source Input Mixing with Microphone Priority Ducking
Features two stereo RCA auxiliary inputs for background music sources, a 1/4-inch front-panel microphone input with VOX voice-activated priority override (ducking), and a telephone paging input for emergency announcements.
Front-Panel Tone Controls & Master Level Calibration
Independent volume knobs for Mic 1, Aux 1, and Aux 2 allow precise source balancing, paired with master bass and treble EQ dials to optimize speech intelligibility across commercial ceiling speaker runs.
Compact Half-Rack Chassis with Commercial Protection
Built into a rugged steel half-rack desktop enclosure that can be rack-mounted using optional rack ears, featuring short-circuit, thermal, and overload protection circuitry for 24/7 continuous operation.
Specifications
| Amplifier Type | Class-D Commercial Mixer Amplifier |
| Power Output | 50 Watts RMS Continuous |
| Output Voltage / Impedance | 70-Volt, 25-Volt, and 4-16 Ohm Low-Impedance Terminals |
| Frequency Response | 50Hz - 18kHz (+/- 3dB) |
| Total Harmonic Distortion (THD) | <0.5% at Rated Output |
| Signal-to-Noise Ratio (S/N) | Mic: >65dB, Aux: >75dB |
| Inputs | 1x 1/4-Inch Microphone Input, 2x Stereo RCA Aux Inputs, 1x Telephone Paging Terminal |
| Priority Ducking | VOX Voice-Activated Muting on Mic 1 (Overrides Aux Inputs) |
| Tone Controls | Bass (+/- 10dB at 100Hz), Treble (+/- 10dB at 10kHz) |
| Protection Circuitry | Thermal Overload, Short-Circuit, and Power Surge Protection |
| Dimensions (W x D x H) | 8.3 x 7.5 x 2.6 Inches (210 x 190 x 66 mm) |
| Unit Weight | 5.2 lbs (2.4 kg) |
In The Box Contents
- 1x OSD PAX-50 50W 70-Volt Commercial Mixer Amplifier
- 1x Detachable AC Power Cable
- 1x Set of Adhesive Rubber Feet for Desktop Placement
- 1x Commercial Installation Manual and 70V Wiring Guide
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