JBL Control 31 (B-Stock)
$518.70 Price reduced from $741.00 to Save 30%


JBL Control 31 (B-Stock) Built-in InvisiBall® mounting hardware - Image

Built-in InvisiBall® mounting hardware

Provides a high degree of both vertical and horizontal rotation, and a high degree of theft deterrence

JBL Control 31 (B-Stock) 110° x 110° symmetrical coverage - Image

110° x 110° symmetrical coverage

Provides the same coverage regardless whether the cabinet is installed in vertical or horizontal orientation

JBL Control 31 (B-Stock) Highly outdoor-capable design - Image

Highly outdoor-capable design

WeatherMax™ multi-layer grille and optional marine-kit grille for salt-air environments

JBL Control 31 (B-Stock) Built-in 150 Watt 70V/100V multi-tap transformer with 8Ω thru - Image

Built-in 150 Watt 70V/100V multi-tap transformer with 8Ω thru

For operation on distributed speaker lines

Specs & Downloads

Item# CONTROL 31-Z


Two-Way High-Output Indoor-Outdoor Monitor Speaker

The Control 31 utilizes high-power components, computer optimized horn, and a complex network to achieve smooth, powerful high-fidelity performance, extended bandwidth, and well-controlled defined coverage from a compact loudspeaker. The 250 mm (10 inch) low-frequency driver features a woven fiberglass cone for a high degree of weather capability and pure butyl rubber surround for clean sound quality, a high-temperature fiberglass voice coil former for high sensitivity, high output capability and stable performance under long-term high power working conditions. The optimized cone geometry provides for smooth frequency response and good off-axis performance. A linear suspension spider provides low distortion, while FEA-optimized motor construction produces minimum harmonic distortion. An aluminum coupler ring outside the pole post further reduces distortion and further increases the sensitivity. The high-output high frequency compression driver features a unique patented design, high temperature polymer diaphragm, and fluid-cooling for high output levels with low distortion. The high-frequency waveguide was designed using JBL’s advanced ImageControl™ process for accurate, low-distortion control, with smooth frequency response and excellent sound character throughout the frequency band, over the entire listening area. It’s 110° x 110° symmetrical coverage, provides the same coverage regardless whether the cabinet is installed in vertical or horizontal orientation. The field-proven top-quality line distribution transformer, designed for minimal insertion loss and reduced saturation, allows for use on either 70V or 100V distributed speaker lines. In the Thru setting, the 8 ohm impedance allows for the use of up to two speakers on a 4-ohm capable amplifier channel. The included InvisiBall mounting method is simple to install, aims easily and provides a high degree of theft deterrence. InvisiBall allows horizontal rotation of up to 41° off-axis and vertical rotation of up to 36° (horn end inward) or 23° (woofer end inward). Attachment points for the optional MTC-30UB (& “-WH” for white) U-bracket allows for compact installation and is particularly useful for low-profile applications. Weather resistance has been maximized. The low-frequency driver features a woven fiberglass cone, a pure butyl rubber surround, and the basket is rear loaded into the baffle to minimize exposure. The high-frequency compression driver has a highly weather capable polymer diaphragm. The grille is thermoset composite coated and stands up well to UV as well as humidity. The grille is backed with our WeatherMax™ multi-layer foam and tight-weave screening to help prevent incursion of water. Nickel/zinc rust-resistant terminals ensure a secure input connection. An MTC-PC2 sealed-entrance cover is included to further protect the speaker’s terminals. The white-version cabinets are painted with a UV-resistant finish to resist yellowing due to UV exposure. Available in black or white (-WH), the cabinet will accept a variety of paints to match any décor.

General Specifications

Frequency Range (-10 dB)
33Hz – 19kHz
Frequency Response (±3 dB)
42Hz – 14kHz
Power Ratings
250 W (1000 W peak), 2 hrs. ; 200 W (800 W peak), 100 hrs.
Maximum SPL @ 1m
116 dB continuous (123 dB peak)
Nominal Sensitivity
92 dB
Coverage Angle
110° x 110°
Directivity Factor (Q)
5.7, averaged 500 Hz to 10 kHz
Directivity Index (DI)
7.3 dB, averaged 500 Hz to 10 kHz
Nominal Impedance
8 ohms
Crossover Type
2nd order low-pass, 2nd order high-pass, plus conjugate shaping circuitry.
Transformer Taps
70V = 150W, 75W, 38W, 19W ; 100V =
Recommended High-Pass
Protective 40 Hz high-pass (24 dB/oct) for any transformer tap and for 8Ω operation
Low Frequency Transducer
250 mm (10 in) woven-fiberglass cone with pure butyl rubber surround, 52 mm (2 in) voice coil on hightemperature fiberglass voice coil former, optimized cone geometry, linear suspension spider, FEA-optimized motor construction, aluminum ring on pole piece.
High Frequency Transducer
JBL 2414H-C compression driver with 25 mm (1 in) diaphragm and voice coil diameter, high temperature polymer diaphragm, JBL-patented design, fluid-cooled.
Included Accessories
1 pc MTC-PC2 input panel cover, InvisiBall wall-mounting system, 6 mm x 305 mm InvisiBall hex wrench.
Optional Accessories
MTC-30MK Marine-Kit Grille in black or white (-WH), consisting of grille and protective covers for baffle screws. ; MTC-30CM (&-WH) Ceiling-Mount Adapter for installing speaker down from the ceiling. ; MTC-30UB (&-WH) U-Bracket


593 x 372 x 345 mm (23.3 x 14.6 x 13.5 in)
Weight (ea)
18.8 kg (41.5lb)
Shipping Weight (ea)
22.0 kg (48.5 lb)

What's in The Box?

  • 1 x Control 31
  • 1 x MTC-PC2 input panel cover
  • 1 x InvisiBall™ wall-mounting system
  • 1 x 6 mm x 305 mm hex key

Documents & Downloads

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