Office Sound System with 12 C3 Ceiling Speakers and MA120BT 120W Bluetooth Mixer Amplifier

Inside the Design

This commercial office sound system provides clear, evenly distributed audio for background music, paging, and general workplace communication. Outfitted with twelve compact C3 3" micro ceiling speakers and the Pure Resonance Audio MA120BT 120W mixer amplifier, this system is designed for professional environments requiring reliable, high-quality audio performance. The ultra-discreet C3 speakers blend seamlessly into standard drywall ceilings while delivering impressive sound coverage, making them ideal for offices, meeting rooms, hallways, and collaborative spaces. The MA120BT 7-channel Bluetooth-enabled amplifier offers flexible input options, 70V/100V/4Ω/8Ω outputs, and simple operation, making it a highly versatile solution for commercial installations.

Sound System Features:

• Easy-to-install 70V/100V sound system with compact micro ceiling speakers
• C3 ceiling speakers offer wide coverage with the smallest possible footprint
• Ideal for delivering background music, paging, and general audio throughout office environments
• MA120BT 120W mixer amplifier with 7 input channels for flexible system integration
• Bluetooth-enabled for wireless music streaming from compatible devices
• Built-in MP3 media player with USB, SD, and FM radio support
• MOH (Music on Hold) output and telephone input with VOX priority
• Versatile output support: 70V, 100V, 4Ω, and 8Ω speaker configurations

About the System Components

Pure Resonance Audio C3 3" Micro Ceiling Speakers with Easy-Mounting Rings

The Pure Resonance Audio C3 speakers deliver high-quality sound in an ultra-compact ceiling-mounted form factor. Designed for minimal visual impact, these 3" micro speakers blend effortlessly into office ceilings while providing clear, even audio coverage. Each speaker includes a drywall mounting ring for fast installation without additional hardware. The built-in power tap transformer allows selectable 8Ω or 70V/100V operation, making the C3 adaptable for a wide range of commercial sound applications. Ideal for background music, paging, and ambient sound reinforcement, these speakers offer impressive performance for their size.

Pure Resonance Audio MA120BT 7-Channel 120W Commercial Mixer Amplifier with Bluetooth

The Pure Resonance Audio MA120BT is a versatile 7-channel mixer amplifier engineered to support commercial audio systems with flexible output and input requirements. Delivering 120W of clean, reliable power, the MA120BT supports 70V, 100V, 4Ω, and 8Ω speaker configurations, making it an excellent match for multi-zone or distributed audio systems. It features Bluetooth connectivity, a built-in MP3 player with USB, SD, and FM radio, plus multiple mic and line inputs for paging and announcements. With a passive cooling design, low distortion (<0.5% THD), and robust protection features—including short-circuit, overload, clip, and high-temperature protection—the MA120BT ensures long-term reliability. An included IR remote provides convenient control of media playback functions.

System & Component Videos

Pure Resonance Audio C3 3" Micro Ceiling Speaker with C3 Drywall Mounting Ring

• Compact and lightweight design
• Smallest possible footprint while maintaining powerful, high-quality sound
• Intelligent, low-profile appearance blends seamlessly into ceilings
• Power tap transformer switch for selectable 8Ω or 70V/100V operation for commercial installations
• Tap settings:
• 70V: 8Ω, 1.5W, 3W, 5W
• 100V: 8Ω, 3W, 6W, 10W
• Quick and easy installation using the included drywall mounting ring
• Ideal for background music in offices, retail spaces, restaurants, hotels, lobbies, and auxiliary rooms
• The unique drywall mount design requires no additional hardware—simply screw on the mount and install the speaker

Pure Resonance Audio MA120BT 7-Channel 120W Commercial Mixer Amplifier with Bluetooth

• 120W power output designed for reliable performance in commercial audio systems
• 7 input channels for flexible integration of microphones, music sources, and paging devices
• Supports 70V, 100V, 4Ω, and 8Ω speaker outputs for versatile system configuration
• Built-in Bluetooth for wireless audio streaming from phones, tablets, and computers
• Integrated MP3 media player with USB, TF card, FM tuner, and Bluetooth functionality
• Line frequency response of 60 Hz-15 kHz delivers clean, high-quality audio for BGM and paging
• <0.5% total harmonic distortion ensures clear and consistent sound
• High signal-to-noise ratio: Line ≥85 dB; Mic ≥72 dB
• Passive cooling design (no fan) provides quiet operation and long-term reliability
• Protection circuitry includes short-circuit, overload, high-temperature, and clipping safeguards
• No dedicated emergency priority input, ideal for small to mid-sized commercial systems
• Easy-to-use shelf/compact-mount form factor for versatile installation
• Includes IR remote control for convenient operation of media playback functions

• (12) Pure Resonance Audio C3 3" Micro Ceiling Speakers with Easy-Mounting Rings
• (1) Pure Resonance Audio MA120BT 7-Channel 120W Commercial Bluetooth Mixer Amplifier
• (1) IR Remote Control
• (1) Power Cord
• (500') West Penn 224 18/2 Non-Plenum Audio Speaker Wire - Gray