Premium Office Sound Masking System Featuring 8 C5 4" 70V Ceiling Speakers & MA120BT 120W Mixer Amplifier with PrivacyCard White Noise Generator

$ 1,808.99
$ 1,529.99


Ceiling Speaker Speech Privacy System
for up to 2000 SF

This commercial office sound masking system reduces distractions from other co-workers, telephones, loud equipment, and outside noises while also providing speech privacy. The white noise blends into the background making your space more acoustically comfortable, which can increase productivity and focus. This sound masking system for offices is extremely versatile and simple to use. It combines eight 4" recessed ceiling speakers with a 120W mixer amplifier and a white noise PrivacyCard™ for plug-n-play sound masking.


Ideal for drop tile ceilings, these speakers are engineered for ceiling tiles with the screw on Easy-Mounting threaded mounting rings.


The C5's compact recessed design with an ultra-thin flat bezel offers a small footprint that seamlessly integrates into any ceiling while maintaining quality audio.

Sound Masking PrivacyCard™

Eliminate distractions and create a productive workspace. Easily add sound masking and speech privacy for your business.

Sound Masking + More

The MA120BT allows the user to select, play and control sound masking, music and paging to the desired levels and mix proportions of music and masking sounds.


The MA120BT is equipped with inputs for wired or wireless microphones, CD/DVD players, laptops, computers, TF cards and USB thumb drives.

Remote Control

The included remote control manages volume levels, play/pause, skip and more all from a distance.



This commercial office sound masking system reduces distractions from co-workers, office equipment, and outside noise while ensuring speech privacy. The seamless integration of white noise improves acoustic comfort, productivity, and focus. With eight C5 4" recessed ceiling speakers, the MA120BT Bluetooth mixer amplifier, and the white noise USB PrivacyCard™, it's a hassle-free plug-and-play solution for a better office environment.

PrivacyCard™ USB White Noise Sound Masking Generator

Pure Resonance Audio has taken the mystery out of sound masking by creating an affordable USB sound masking generator that's small, portable and incredibly easy to use. The Pure Resonance Audio PrivacyCard™ sound masking generator pairs white noise sounds with the all-so-familiar USB drive enabling you to plug-in and play white noise with almost any USB mixer or mixer amplifier.

C5 Micro 4" 70 Volt Ceiling Speakers

The Pure Resonance Audio C5 is a compact 4" micro 70-volt ceiling mount speaker known for its seamless integration. It offers high-quality audio for music, paging, and sound masking in commercial spaces, including offices, retail stores, restaurants, hotels, and so much more. The speaker features a 4" driver and a frequency response of 90Hz - 20kHz with 91dB sensitivity. It includes a built-in 70V/100V transformer with an 8-ohm bypass and is easy to install with the provided screw-on Easy-Mounting ring and C5-TB tile bridge for added support.

MA120BT 7-Channel 120W Mixer Amplifier

The Pure Resonance Audio MA120BT mixer amplifier with built-in Bluetooth and 70V/100V transformer technology provides a simple-to-operate and reliable 6-input solution with a built-in Bluetooth media player for installation in commercial applications. With an easy-to-use interface, balanced and unbalanced inputs, and 70V, 100V, 8 ohm, or 4 ohm outputs, this versatile and compact mixer-amp is an easy choice for any application.

Due to the possibilities of FM radio interference and the variables involved, it's not recommended to use FM radio as your primary input source.


RMS Power Rating:  10 Watt

Frequency Response:  90Hz - 20kHz

Low Frequency (-10 dB):  120Hz - 20kHz

Impedance:  8 Ohms

Transformer Taps:  2.5W, 5W, 10W @ 70V
                               5W, 10W, 20W @ 100V
                               8 Ohm Bypass

Transducer:  Full-range 4" driver

Nominal Coverage Angle:  120° x 120°

Maximum SPL:  104dB±3dB

Cutout Size:  6.25" (158.75 mm)

Easy-Mounting Ring (Dia):  7.46" (189.4 mm)

Mounting Depth:
5.51" (139.83 mm) with connector

Overall Dimensions (Dia x D):
6.7" (170.2 mm) x 5.55" (141 mm) with connector

Weight:  2.93 lbs (1.33 kg)                                                                                                                                                              


Rated Power Output: 120 Watt

Speaker Outputs: 70V, 100V and 4 Ohms, 8 Ohms or 16 Ohms

Mic 1 input by balanced XLR with phantom power
Input 2-3 Mic/Line switchable unbalanced 6.3 mm phone jack
Line 1-2 inputs by RCA; Line output by RCA

Attenuation Microphone: 1-3, line 1-2 and MP3/FM Radio, bass/treble and master

Input: MIC 1-3: 5-8mV, 600Ω; Line, 150-470mV, 10KΩ, unbalanced RCA

Line Out: 0.775 (0dBV)

Frequency Response: 60Hz - 15kHz (±3dB)

S/N Ratio: Line ≥ 85dB, Mic≥ 72dB

THD: Less than 0.5%

Protection: Short-circuit, clip, overload and high temp protection

Power Consumption: 60 Watt

Power Supply: 115V 60Hz & 24V DC

Remote Control: IR remote control with (replaceable) CR2025 3V lithium battery

Dimensions: 3.5" (88 mm) x 11.8" (300 mm) x 10.8" (275 mm)

Weight: 6.6 lbs (3 kg)


(8) Pure Resonance Audio C5 Micro 4" 70 Volt Ceiling Mount Speakers
        (8) Pure Resonance Audio C5-TB Tile Bridges for C5 4" Ceiling Speakers
(1) Pure Resonance Audio MA120BT 120W Bluetooth Mixer Amplifier
     (1) IR Remote Control
     (1) Power Cord
(1) Pure Resonance Audio PrivacyCard™ USB Sound Masking Generator - White Noise
(500') 18/2 Gauge Speaker Wire


C5 Ceiling Speakers:


Cut Sheet

MA120BT Mixer Amplifier:


Cut Sheet

USB PrivacyCard:

Quick Start Guide