Cambridge Sound E-A-B-16-4 Standard Emitters, Black, 4 pack, with 4 x 16 ft black plenum rated cables - 911.0889.900

Product Overview

The Cambridge Sound E-A-B-16-4 is a four-pack of black Qt Active Emitters bundled with four 16-foot black plenum-rated cables, part number 911.0889.900. Each single-source emitter performs sound masking while simultaneously reproducing clear paging and music signals. The design delivers higher SPL and a broader frequency range than earlier direct-field emitters in a compact housing that virtually disappears in finished or open-structure ceilings.

Product Description

Traditional sound masking relies on large loudspeakers that bounce sound off the ceiling deck, distributing masking indirectly. The Qt Active Emitter instead uses Cambridge Sound Management's patented direct-field Quiet Technology to project even masking straight into the workspace. Direct-field emission also improves paging intelligibility and music quality, since the speaker faces the listener rather than firing through ceiling material. Frequency response runs 125 Hz to 10,000 Hz for masking and 115 Hz to 12,000 Hz (-10 dB) for music and paging, with masking levels adjustable from 30 to 60 dBA and music/paging output reaching 74 dBA at 1 meter. Each emitter sequences four uncorrelated audio channels to suppress phasing and comb-filtering. The pack uses the same Qt 300 and Qt 600 control modules and category UTP cabling infrastructure as the rest of the QtPro line, with preset masking curves for plug-and-play calibration. Power draw is just 2 watts at 36 VDC, and the front-vented enclosure is UL 2043 certified. Browse compatible controllers and accessories in the Cambridge Sound collection at Creation Networks.

Key Features

• 16 ft Plenum Cables Included — four black plenum-rated cables ship in the box for immediate installation.
• Single-Source Masking, Paging, Music — one emitter covers all three audio functions in office environments.
• Extended Frequency Range — 125 Hz–10 kHz masking response; 115 Hz–12 kHz (-10 dB) for music and paging.
• 17 dB Higher Output — louder than previous direct-field emitters, with 74 dBA max music/paging SPL at 1 meter.
• Four Uncorrelated Channels — auto-sequencing channel selection reduces phasing and comb-filtering.
• Low Power Draw — 2 W maximum consumption at 36 VDC operating voltage.
• UL 2043 Certified — plenum-rated, UL-listed enclosure for open and finished ceilings.
• Selectable Attenuation — rear DIP switches step output down 0 / -1.5 / -3 / -4.5 dB.
• QtPro Infrastructure — works with Qt 300 and Qt 600 controllers over RJ-45 category UTP cabling.

Typical Applications

This pack fits open-plan offices, conference room perimeters, healthcare clinics protecting HIPAA speech privacy, financial services floors, and any workspace needing combined masking, paging, and background music. The black housing and cables suit open-structure ceilings and dark plenums where visual discretion matters.

Technical Specifications

Specifications sourced from Cambridge Sound vendor data. Unlisted values are omitted rather than estimated.

Frequently Asked Questions

What is included in the E-A-B-16-4 pack?

Four black Qt Active Emitters, four 16 ft black plenum-rated cables, and acoustic ceiling tile mounting rings.

Which control modules does this emitter require?

It connects to Cambridge Sound Qt 300 or Qt 600 control modules over RJ-45 category UTP cabling, with preset masking curves for each emitter type.

Can this emitter play paging and music while masking?

Yes. It is a single-source emitter that reproduces sound masking and simultaneous paging or music, with up to 74 dBA output at 1 meter.

Is the emitter safe to install in a plenum?

Yes. The enclosure is plenum-rated, UL-listed, and complies with UL 2043, and the included cables are plenum-rated.