JBL Control 312CS - 400W 12-inch Passive Ceiling Subwoofer with Pre-Attached Ported Baffle in Black Finish

The JBL Professional Control 312CS is a high-performance 12-inch passive ceiling subwoofer designed to deliver extended bass response in a variety of professional audio systems. It is particularly effective when paired with JBL Control 321, 322, and 328 loudspeakers, or any full-range speaker system requiring deep, powerful low-frequency performance. The Control 312CS is engineered for high power handling and provides superior sound reproduction, making it an ideal choice for venues such as commercial spaces, theaters, and other high-demand installations where deep bass and clarity are essential.

At the heart of the Control 312CS is a 300 mm (12-inch) Kevlar-reinforced low-frequency driver. This durable driver features a well-damped surround and extended excursion capability to handle high power levels without distortion. The 75 mm (3-inch) high-temperature voice coil ensures excellent thermal stability, providing reliable performance even under continuous high-power operation. The advanced design of the driver, including a saturated-gap magnet geometry, minimizes distortion and optimizes sound clarity, ensuring that the bass response remains tight and controlled even at high volumes.

The Control 312CS offers a wide frequency response range of 30 Hz to 4.5 kHz, with a frequency range extending from 34 Hz to 3.5 kHz, ensuring smooth, extended low-end performance. This speaker is capable of handling up to 400 watts of continuous program power (1600 watts peak), providing high SPL capability of up to 121 dB continuous average (124 dB peak). This power handling, combined with the 93 dB sensitivity (2.83V @ 1m), enables the Control 312CS to deliver deep bass with impressive output and clarity, even in large spaces.

The speaker's innovative design also includes JBL's EZRail feature, which simplifies installation. The pre-attached ported baffle temporarily holds one side of the speaker baffle in place, making it easier for installers to affix the baffle to the backcan using screws. The Control 312CS is designed for use with an external active subwoofer crossover and a separate amplifier channel dedicated to driving the subwoofer. This ensures that the subwoofer can achieve optimal low-frequency performance in a variety of sound systems.

For installations requiring additional durability and improved low-frequency performance, the Control 312CS can be paired with the optional MTC-300BB12 backbox. This backbox is made from extra-thick 16-gauge steel and lined with medium-density fiberboard (12 mm, 1/2-inch), providing the acoustics of a high-quality wood speaker enclosure in a metal backbox form. The backbox helps optimize the subwoofer's bass response and reduces unwanted resonances. The grille, available in the optional MTC-300SG12 square grille, offers a sleek, contemporary look suitable for high-end venues, ensuring that the speaker fits seamlessly into various architectural styles.

Built to withstand the demands of both commercial and residential environments, the Control 312CS features weather-resistant components. The Kevlar-reinforced woofer and polymer diaphragm compression driver ensure reliable performance in various environmental conditions, while the grille is thermoset composite-coated for UV and humidity resistance. The included MTC-PC2 sealed-entrance cover further protects the speaker's terminals, ensuring a long lifespan even in challenging environments.

The Control 312CS subwoofer's performance is backed by JBL's rigorous testing standards, including a 100-hour torture power test, which ensures long-term reliability and durability. Whether used in foreground or background music systems, or for paging applications, the Control 312CS delivers powerful, low-frequency sound with clarity and precision.

Features

• 400W continuous program power (1600W peak), capable of handling up to 121 dB continuous SPL (124 dB peak)
• 300 mm (12-inch) Kevlar-reinforced low-frequency driver with a high-temperature 75 mm (3-inch) voice coil for high sensitivity and stable performance
• Frequency range of 34 Hz to 3.5 kHz and frequency response of 30 Hz to 4.5 kHz for extended bass performance
• Advanced distortion-reducing design with saturated-gap magnet geometry for clear, tight bass
• Innovative EZRail mounting system for easy installation with secure baffle attachment
• Weather-resistant components, including a Kevlar-cone woofer and weatherproof grille for outdoor durability
• Includes pre-attached ported baffle for ease of installation
• Nominal impedance of 8 ohms with transformer taps for 70V and 100V systems (150W, 75W, 38W, 19W for 70V and 150W, 75W, 38W for 100V)
• Optional MTC-300BB12 backbox for enhanced bass performance and durability
• Dimensions: 14.4 x 14.4 inches square baffle, 6.3 inches depth from back of baffle
• Net weight: 17.0 lbs; shipping weight: 18.5 lbs

Specifications

System

• Frequency Response: 30 Hz - 4.5 kHz
• Frequency Range: 34 Hz - 3.5 kHz
• Long-Term System Power Rating (AES):
  • 400W (1600W peak), 2 hrs
  • 250W (600W peak), 100 hrs
• Sensitivity (2.83V @ 1m): 93 dB measured half-space
• Maximum SPL: 121 dB continuous average (124 dB peak)
• Nominal Impedance: 8 ohms

Transducers

• Driver: Kevlar reinforced cone, 75 mm (3 in) voice coil

Physical

• Input Connector: Removable locking connector with screw-down terminals. Max wire 12 AWG (2.5 mm2)
  • 1) + in
  • 2) + loop through
  • 3) - loop through
  • 4) - in
• Safety Agency Rating: Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70 when installed with UL listed backcan such as JBL MTC-300BB12. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849.
• Baffle: Metal, 366 x 366 mm (14.4 x 14.4 in), driver pre-mounted to baffle, ported, EZRail for easier installation to backbox
• Baffle Attachment to MTC-300BB12 Backbox: Attach via either 4 corner holes M4 x 14 mm machine screws, or 6 side holes #10 x 0.75 in (19 mm) sheet metal screws
• Grille Attachment to Baffle: 4 pcs 4 mm machine screws in corners
• Dimensions: 14.4 x 14.4 in square baffle x 6.3 in depth from back of baffle
• Net Weight: 17.0 lbs
• Shipping Weight: 18.5 lbs
• Included Accessories: Ported baffle pre-attached
• Optional Accessories: MTC-300SG12 Grille, square contoured, white, MTC-300BB12 Backbox, 80 liters (3 cubic feet)