JBL 3631
JBL 3631

JBL 3631 Three-Way Bi-Amplified Screen Array Cinema Loudspeaker System.

For critical film sound reproduction in small to medium cinemas and studio production and postproduction environments.

Today’s Cinema patron demands perfect coverage in every seat of the auditorium, wide dynamic range and extended bandwidth, as well as inaudible levels of distortion. Digital soundtracks have the potential to push the traditional two-way screen channel speaker system beyond intended performance limits. This dictates the need for a new standard of loudspeaker performance for today’s premier cinemas.

The 3631 ScreenArray features true three-way system design enhanced by advanced engineering. JBL Professional’s best technical innovations are integrated in a system design that provides superior coverage, maximum power handling, and uniform acoustic power output, along with extremely low distortion.

The ScreenArray design provides ideal power response and directivity control with seamless transitions between acoustic sections. The 3631 is available for bi-amplified or for triamplified operation.

  • Three-way ScreenArray design for maximum output, optimal coverage, and minimum distortion 
  • One 380 mm (15") Vented Gap Cooled (VGC™) LF Transducer 
  • Available for Bi-amplified operation (Model 3631) or Tri-amplified operation (Model 3631-T) 
  • Approved for THX certified applications (3631-T) 
  • M/HF ships fully assembled 
  • Second Generation Optimized Aperture Waveguide technology for ultra-low distortion, and extremely uniform frequency response 
  • SSC Screen Spreading Compensation 
  • Focused Coverage Technology 
  • Flat-front waveguide design for easy baffle wall installation 
  • Shallow depth for minimum behind screen requirements 
  • Low profile design with 600W LF

Frequency Range

30 Hz - 20 kHz

Frequency Response (±3 dB)

40 Hz - 16 kHz

System Sensitivity

104 dB, 2.83V @ 1m (3.3 ft)

Rated Maxium SPL

126 dB @ 1m (3.3 ft), 132 dB peak

System Input Power Rating

LF: 600 watts, M/HF: 150 watts [HF: 50 watts]

Hor. Coverage Angle (-6 dB)


Vert. Coverage Angle (-6 dB)

20° up, 30° down

Directivity Factor (Q)


Directivity Index (DI)

10 dB

Crossover Frequencies

350 Hz [1.2 kHz]

Dimensions (HxWxD)

1600 mm x 762 mm x 450 mm
(63 in x 30 in x 17.75 in)

Net Weight

68.6 kg (151 lbs)

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Magna-Tech Electronic Co., Inc.
6114 NW 74th Ave.
Miami FL 33166 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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