Cambridge Sound E-A-B-25-4 Standard Emitters, Black, 4 pack, with 4 x 25 ft black plenum rated cables - 911.0890.900

Product Overview

The Cambridge Sound E-A-B-25-4 (part number 911.0890.900) is a four-pack of Qt emitters in black, supplied with four 25-foot black plenum rated cables. Emitters are the ceiling loudspeakers of a Qt direct-field sound masking system, distributing the masking signal evenly into the workspace below. The 25-foot cable length suits typical runs from emitter to emitter or back to zone cabling in standard ceiling grids. Black housings blend into dark or open-structure ceilings.

Product Description

In a Qt direct-field system, the control module generates the masking signal and the emitters reproduce it facing downward into the occupied space, rather than bouncing sound off the ceiling deck the way conventional in-plenum loudspeakers do. That direct path yields a more uniform masking level across the floor plate with less acoustic variation between workstations. This pack provides four black emitters along with four 25-foot black plenum rated cables, allowing the cabling to run above suspended ceilings and through air handling spaces. Emitter packs like this one are the repeating building block of a deployment: designers lay out emitters on a regular grid and daisy-chain them back to the Qt control module zone outputs. The black finish suits exposed ceilings, dark tile, and open-structure architectural treatments. Combine this pack with a Qt control module and additional emitter packs from the Cambridge Sound collection to cover the full space.

Key Features

• Four-Emitter Pack — the standard building block for laying out direct-field masking coverage.
• 25 ft Plenum Rated Cables Included — four black plenum rated cables ship with the emitters for above-ceiling runs.
• Direct-Field Masking — emitters face the workspace for uniform masking without relying on plenum reflections.
• Black Finish — blends into dark tile, exposed structure, and open ceilings.
• Qt System Component — designed for Cambridge Sound Qt sound masking systems driven by a Qt control module.

Typical Applications

• Open offices — grid-based emitter layout delivers uniform masking across floor plates.
• Call centers — reduces speech distraction between adjacent agent positions.
• Healthcare facilities — supports speech privacy in exam rooms and waiting areas.
• Law and financial offices — protects confidential client conversations.
• Conference rooms — masks speech transfer to and from adjacent spaces.

Technical Specifications

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

FAQ

What comes in the E-A-B-25-4 pack?
Four black Qt emitters and four 25-foot black plenum rated cables.

Do these emitters work on their own?
No. Emitters are the loudspeakers of a Qt sound masking system and must be driven by a Qt control module, which generates the masking signal.

Can the cables run above a suspended ceiling?
Yes. The included 25-foot cables are plenum rated for installation in air handling spaces.

How many packs do I need?
Coverage depends on ceiling height and floor area; emitters are laid out on a regular grid, so most projects combine multiple four-packs per zone.