James Loudspeaker EMB15-4-M - Passive 15" EMB In-Room Down Firing Subwoofer, 4-Ohm

Product Overview

The James Loudspeaker EMB15-4-M is a passive 15" down-firing subwoofer wired for 4-ohm operation, built for commercial AV systems that distribute the deepest low-frequency reinforcement across multiple zones. Its down-firing 15-inch driver couples powerful bass to the floor, while the 4-ohm configuration makes this distributed subwoofer a match for low-impedance amplifier channels. As a passive sub, it runs from an external subwoofer amplifier. The EMB15-4-M suits integrators specifying maximum-output distributed low-frequency support.

Product Description

The EMB15-4-M is the 4-ohm, down-firing distributed variant within the James Loudspeaker EMB subwoofer family. The 15 indicates a 15-inch driver, the -4 indicates 4-ohm wiring, and the -M designates the distributed model intended for multi-unit low-frequency systems. Because it is passive, the EMB15-4-M requires an external subwoofer amplifier, and its 4-ohm impedance suits standard low-impedance amplifier outputs. It is the largest driver in the distributed EMB range, stepping up in displacement from the EMB12-4-M and the EMB10-4-M. The finished cabinet supports in-room placement. The full lineup is available in the James Loudspeaker collection. This makes the EMB15-4-M a practical specification for maximum-output distributed bass on low-impedance amplifiers.

Key Features

• 15-Inch Driver — A single 15-inch woofer delivers the highest output in the distributed EMB range.
• Down-Firing Design — The driver faces the floor, coupling deep bass into the room for even distribution.
• 4-Ohm Configuration — Wired for 4-ohm operation to match low-impedance amplifier channels.
• Distributed Variant — The -M model is built for multi-unit low-frequency reinforcement systems.
• Passive Operation — Driven by an external subwoofer amplifier for full integrator control.

Typical Applications

• Distributed low-frequency systems
• Large commercial theaters and venues
• Multi-zone audio installations
• High-end residential and hospitality spaces

Technical Specifications

Frequently Asked Questions

Does the EMB15-4-M need an amplifier?
Yes. It is a passive subwoofer and requires an external subwoofer amplifier.

What impedance is it?
It is wired for 4-ohm operation to match low-impedance amplifier channels.

What is the driver size?
The EMB15-4-M uses a single 15-inch down-firing driver.

Is it the largest distributed EMB sub?
Yes. The 15-inch driver gives it the greatest displacement in the distributed EMB range.

How does it compare to the EMB12-4-M?
The EMB15-4-M uses a larger 15-inch driver for greater displacement than the 12-inch EMB12-4-M.