JBL Control 321C 12" 2-Way 250W Coaxial Ceiling Speaker

Product Overview

The JBL Control 321C is a passive 12-inch coaxial ceiling loudspeaker built for voice amplification and foreground-music reproduction in commercial AV installations. It suits offices, waiting rooms, retail stores, restaurants, and meeting spaces that need clear speech and program audio from a ceiling-grid layout. With a Kevlar-reinforced 12-inch cone and a compression driver, this coaxial ceiling speaker provides 250 W long-term power handling (1000 W peak) and consistent 90-degree broadband coverage. It runs as a low-impedance 8-ohm speaker for discrete high-fidelity zones.

Product Description

The Control 321C pairs a 300 mm (12 in) Kevlar-reinforced cone woofer with a 50 mm (2 in) voice coil and a 25 mm (1 in) compression driver, yielding an extended frequency response of 47 Hz - 16 kHz. The cone also serves as a high-frequency waveguide, producing reliable 90-degree broadband coverage, while an advanced high-slope crossover network ensures proper frequency distribution and a smooth, natural midrange. A removable locking connector with screw-down terminals ensures simple wiring for the input and loop output. Driven by a low-impedance power amplifier (sold separately), it is suited to discrete high-fidelity ceiling zones. Explore related models in the JBL Professional installed audio collection. The companion JBL Control 321CT (70V/100V version) serves the alternate wiring scheme.

Key Features

• 12-inch coaxial design — A 300 mm Kevlar-reinforced cone and compression driver share an axis for time-aligned, full-range output.
• 90-degree broadband coverage — The cone-as-waveguide geometry maintains consistent pattern control across the listening area.
• 250 W power handling — High power handling (1000 W peak) with high sensitivity provides strong SPL capability.
• Extended frequency response — Clear speech and vocals with extended response for foreground music (47 Hz - 16 kHz).
• High-slope crossover network — Maintains constant coverage and a smooth, natural midrange transition.
• Low-impedance 8-ohm operation — Driven directly by an 8-ohm amplifier for discrete high-fidelity zones.
• Locking connector wiring — A removable locking connector with screw-down terminals simplifies input and loop-thru wiring.

Typical Applications

• Conference room — Clear speech and program audio in standard ceiling-grid layouts.
• Commercial meeting space — Even foreground coverage for lobbies and gathering areas.
• Multi-purpose room — Flexible voice and music reproduction across wide rooms.
• Training room — Intelligible voice reinforcement for seated audiences.
• Government space — Reliable paging and announcement coverage.

Technical Specifications

Full electrical specifications should be confirmed against the JBL Control 321C specification sheet.

Frequently Asked Questions

What amplifier does the Control 321C require?
It is a low-impedance 8-ohm speaker driven directly by an 8-ohm power amplifier (sold separately).

What coverage pattern does it provide?
The coaxial cone-as-waveguide design delivers consistent 90-degree broadband coverage for even intelligibility across the listening area.

How is it wired?
A removable locking connector with screw-down terminals supports input and loop-thru output for fast, secure installation.

What warranty and support apply?
The Control 321C carries JBL Professional's manufacturer warranty. For tap planning and integration support, contact our team or browse the full JBL Professional collection.