The OSD Audio PA90 is a 60W commercial mixer amplifier designed for distributed audio, paging, background music, and announcement systems. Supporting 8-ohm, 70V, and 100V speaker systems, the PA90 combines multiple microphone and source inputs with priority paging, chime and alarm functions, tone controls, and flexible output options in a rack-mountable 2U chassis.

• Flexible 60W Commercial Audio System: Delivers 60 watts into 8-ohm, 70V, or 100V speaker systems, making the PA90 suitable for distributed audio and paging installations in offices, retail spaces, restaurants, schools, and other commercial environments.
• Multiple Microphone and Source Inputs: Includes three balanced XLR microphone inputs with selectable Mic/Line operation and individually switchable 24V phantom power, plus three stereo RCA AUX inputs and a dedicated telephone input with adjustable gain.
• Built for Paging and Announcements: MIC 1 priority automatically mutes other sources when a microphone signal is detected, while built-in Chime, Alarm, and Push To Talk functions provide additional control for announcements and emergency communication applications.

• Amplifier Type: Commercial mixer amplifier
• Rated Output Power: 60W
• Speaker Outputs: 8 Ohm, 70V, 100V
• THD+N: Less than 1% at rated output
• Power Bandwidth: 50Hz to 15kHz
• Frequency Response: 50Hz to 15kHz, +0dB / -3dB
• Microphone Inputs: 3 balanced XLR
• Mic Input Configuration: Switchable Mic/Line level
• Phantom Power: Switchable 24V phantom power for each microphone input
• AUX Inputs: 3 stereo RCA source inputs
• Telephone Input: 3-pin terminal block with adjustable input gain
• MIC 1 Priority: Yes, automatically mutes other inputs when MIC 1 signal is present
• Chime Function: Yes
• Alarm Function: Yes
• Push To Talk: Yes
• Preamp Outputs: 2 mono RCA outputs
• Tone Controls: Bass ±10dB, Treble ±10dB
• Master Volume Control: Yes
• Output Level Meter: LED
• Protection: Short circuit, overheating, and overload protection
• Signal-to-Noise Ratio, Mic: Better than 55dB
• Signal-to-Noise Ratio, Line: Better than 60dB
• Signal-to-Noise Ratio, AUX: Better than 70dB
• Signal-to-Noise Ratio, TEL: Better than 70dB
• Input Sensitivity, Mic: -50dB
• Input Sensitivity, Line: -20dB
• Input Sensitivity, AUX: -12dB
• Input Sensitivity, TEL: -10dB
• AC Power: Switchable 115V / 230V
• DC Power: 24V DC
• AC Mains Fuse: T1.5A / 250V
• Dimensions: 19.0"W x 13.3"D x 3.6"H
• Rack Size: 2U