Martin Audio BlacklineX X15B – 15" Passive Two-Way PA Cabinet

Product Overview

The Martin Audio BlacklineX X15B is a high-power 15" passive two-way PA cabinet designed for professional portable sound reinforcement where maximum SPL and low-frequency authority are required from a single enclosure. Built around a 15" LF driver with a 3" (75mm) voice coil and a 1" exit HF compression driver with a 1.75" polyimide diaphragm, the X15B delivers very high output capability with exceptional sonic impact for live music, rental, and installation applications. Its user-rotatable 80° x 50° horn provides consistent coverage in both vertical and horizontal orientations, and the multi-angle plywood enclosure supports flexible deployment. Paired with a BlacklineX Series subwoofer and the Martin Audio DX0.5 system controller, the X15B functions as the satellite component in a high-output portable PA system for venues requiring elevated headroom.

Product Description

The BlacklineX X15B represents the highest-power passive satellite loudspeaker in the Martin Audio BlacklineX Series, purpose-built for professional portable PA applications that demand maximum acoustic output from a compact two-way enclosure. It is an established choice among AV rental companies, live event production teams, and installation professionals who require a passive loudspeaker capable of handling high-SPL environments.

The LF driver is a 15" (380mm) unit with a 3" (75mm) voice coil, providing the power handling and excursion necessary to reproduce bass-heavy program material at high levels without driver compression. The HF section uses a 1" exit compression driver with a 1.75" (44mm) polyimide diaphragm, which extends high-frequency response for accurate transient reproduction of vocals and percussion.

The 80° x 50° coverage pattern, delivered via a user-rotatable horn, gives operators control over vertical and horizontal dispersion without repositioning the cabinet. This is a practical asset for rental deployments where speaker orientation may change between events. The enclosure is constructed from plywood with black textured paint, fitted with a screw-free cloth-backed steel grille, and equipped with twin NL4 connectors for loop-through in multi-box configurations.

M8 inserts enable wall bracket mounting and eyebolt suspension for permanent and semi-permanent installs, while the 35mm pole-mount socket with a removable bung supports ground-stacked configurations and satellite-over-subwoofer use. The X15B is fully passive and operable without external processing, though system performance is maximized when used with the Martin Audio DX0.5 for EQ, crossover, and limiting. Find companion BlacklineX products at Creation Networks.

Key Features

• 15" High-Power LF Driver — 3" (75mm) voice coil provides high power handling for extended low-frequency output at live music SPL levels.
• 1" Exit HF Compression Driver — 1.75" (44mm) polyimide diaphragm delivers extended high-frequency response for vocal and instrument clarity.
• User-Rotatable 80° x 50° Horn — Operator-adjustable coverage orientation without repositioning the cabinet for fast rental and touring changeovers.
• Symmetrical Multi-Angle Plywood Enclosure — Supports vertical, horizontal, and angled deployment configurations.
• Twin NL4 Connectors — Loop-through wiring for multi-cabinet configurations and distributed systems.
• M8 Insert Mounting Points — Compatible with wall brackets and eyebolt suspension hardware for installation use.
• 35mm Pole-Mount Socket — Removable bung for a clean install profile; supports satellite-over-subwoofer ground stacking.
• 8Ω Nominal Impedance — Compatible with the broad range of professional power amplifiers in rental and install inventories.
• Screw-Free Steel Grille — Cloth-backed perforated grille for rental-grade durability and clean aesthetics.
• Integral Ergonomic Handle — Safe single-person transport during load-in and load-out on portable PA deployments.

Typical Applications

• Live Event Rental Inventory — High-power output, passive design, and durable construction suit the demands of a professional rental fleet.
• Live Music Clubs and Nightclubs — Maximum SPL from a single enclosure makes the X15B a practical main PA choice for small-to-medium live music venues.
• House of Worship — Controlled 80° x 50° dispersion and multiple mounting options serve sanctuaries, auditoriums, and multi-purpose rooms requiring higher output.
• Corporate AV and Conferences — High output and consistent coverage support large ballrooms, general sessions, and outdoor corporate events.
• Festival Secondary Stages — Ground-stack or suspension rigging options make the X15B adaptable to secondary and side-stage PA deployments.
• Auditoriums and Multi-Purpose Rooms — High-output performance with controlled dispersion serves main PA or delay-fill roles in mid-size to large auditoriums.
• Portable PA Systems — Pairs with BlacklineX Series subwoofers for full-range, high-headroom portable PA configurations.

Technical Specifications

Frequently Asked Questions

How does the X15B differ from the X12B?

The X15B uses a larger 15" LF driver with a 3" voice coil versus the X12B's 12" driver with a 2.5" voice coil, providing greater power handling, lower frequency extension, and higher maximum SPL. The X15B is the preferred choice when a venue requires maximum output from a single passive enclosure.

Does the X15B require a DSP processor?

No. The X15B operates as a full-range passive system without a processor. Adding a Martin Audio DX0.5 or equivalent system controller enables dedicated EQ, active crossover to a BlacklineX subwoofer, and limiter protection, which is recommended for professional productions.

What subwoofers pair with the X15B?

The X15B integrates with all BlacklineX Series subwoofers including the X115B (15"), X118B (18"), and X218 (dual 18"). For optimized crossover and EQ alignment, use the Martin Audio DX0.5 or compatible iKON amplifiers. Browse subwoofer options at creationnetworks.net.

Can the X15B be installed in a fixed venue?

Yes. M8 inserts allow wall bracket mounting and eyebolt suspension, supporting flown, wall-mount, and bracket-mount installation configurations suitable for auditoriums, houses of worship, and multi-purpose rooms.

What amplifier power is recommended?

The X15B presents an 8Ω nominal load. Consult the Martin Audio specification sheet for rated continuous and peak power handling values, and size amplifier output accordingly. Professional amplifiers from Crown, Lab.gruppen, QSC, and similar manufacturers are commonly used with this cabinet.

Is the X15B available in configurations other than black?

The X15B ships in a black textured paint finish as standard. For custom finish or RAL color requirements for installation projects, contact Creation Networks directly at creationnetworks.net.

What is the return policy for professional audio equipment?

Return eligibility and terms vary. Contact Creation Networks at creationnetworks.net prior to purchase to confirm return policy and any restocking terms applicable to professional loudspeaker products.