CBT 50LA-1

Constant Beamwidth Technology™ Line Array Column Loudspeaker

CBT 50LA-1
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Constant Beamwidth Technology™ Line Array Column Loudspeaker with Eight 50 mm (2 in) Drivers. With improved mounting bracket for enhanced aiming flexibility.

The CBT 50LA-1, with Constant Beamwidth Technology™, represents a breakthrough in pattern control, utilizing analog delay beam-forming and amplitude tapering to accomplish consistent vertical coverage without the narrow vertical beaming and out-of-coverage lobing that are typical of straight form-factor passive column speakers.


  • Patent-pending Constant Beamwidth Technology™ provides constant directivity up to the highest frequencies and reduces out-of-coverage lobing.
  • Switchable voicing provides flat response in music mode or mid-range presence peak in speech mode.
  • Dynamic SonicGuard™ overload protection
  • Built-in 70V/100V transformer, plus 8 ohm direct capability.
  • Swivel (pan) / tilt wall bracket included.


  Version Language Size Uploaded
file type icon CBT 50LA-1 Spec Sheet
updated: Oct 2020
    2.37 MB Oct 2020
file type icon CBT Brochure
updated: Oct 2020
    973 KB Oct 2020
CAD Drawings
file type icon CBT 50LA-1/100LA-1 Wall Bracket PDF
updated: Oct 2020
    33.2 KB Oct 2020
file type icon CBT 2D DXF/PDF Drawing
updated: Oct 2020
    1.23 MB Oct 2020
file type icon CBT 3D DXF Drawings
updated: Oct 2020
    8.14 MB Oct 2020
file type icon CBT-1 Series Declaration of Conformity
updated: Oct 2019
    144 KB Oct 2019
platform icon CBT Calculator
version, updated: Aug 2023     3.66 MB Aug 2023
Tech Notes
file type icon Tech Note: Volume 1, #35
updated: Oct 2020
    2.23 MB Oct 2020
Speaker Tunings
file type icon Commercial, CBT, and AWC Tunings 220616
version A, updated: May 2023
  557 KB May 2023
Install Guides
file type icon CBT Quick Start Guide
updated: Oct 2020
    1.15 MB Oct 2020
file type icon MTC-PC2 & MTC-PC3 Installation
updated: Sep 2019
    42.5 KB Sep 2019
file type icon MTC-CBT-FM1/FM2 Flush-Mount Wall Brackets for CBT Speakers
updated: Oct 2020
    297 KB Oct 2020
file type icon CBT 50LA-1/100LA-1 Bracket Installation Guide
updated: Oct 2020
    277 KB Oct 2020
file type icon CBT Stand-Mount Bracket Guide
updated: Oct 2020
    476 KB Oct 2020
file type icon CBT Flush-mount Bracket
updated: Oct 2020
    338 KB Oct 2020
Information Documents
file type icon CBT Cabinet Painting Instructions
updated: Oct 2019
    17.2 KB Oct 2019
file type icon CBT Family Hi-Res Image
updated: Oct 2019
    237 KB Oct 2019
file type icon CBT 50LA Hi Res Image
updated: Oct 2020
    106 KB Oct 2020
Application Guides
file type icon Loudspeakers for Sports Facilities
en updated: May 2021
  en  5.71 MB May 2021
file type icon Constant Beamwidth Technology – CBT Series Passive Controlled-Coverage Columns
en updated: Oct 2022
  en  8.48 MB Oct 2022
file type icon CBT Suspension Bracket
updated: Oct 2020
    305 KB Oct 2020
file type icon CBT Frequently Asked Questions
updated: Oct 2020
    193 KB Oct 2020

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Parts & Service


Drivers Eight 50 mm(2 in) Full-Range
Frequency Range (-10dB) 80 Hz – 20 kHz
Coverage Angle Vertical 20° (1.5 kHz - 16 kHz, ±10°)
Horizontal 150° (ave, 1 kHz – 4 kHz, ±20°)
Sensitivity 93 dB (speech mode, 2 kHz - 14 kHz)89 dB (music mode, 300 Hz - 18 kHz)
Impedance 8 ohms
Power Rating 150W (600W peak), 2 hrs
100 W (400W peak), 100 hrs
Maximum SPL (1m) Speech mode: 115 dB cont ave (121 peak)
Music mode: 111 dB cont ave (117 peak)
Transformer Taps 60W, 30W, 15W, (7.5W at 70V only), and 8Ω thru, via switch
Enclosure Fiberglass reinforced ABS cabinet, painted aluminum grille
Outdoor Capability IP-55 rated, per IEC529, when installed with optional MTC-PC2 panel cover. UV, moisture and 200-hr ASTM G85 acid-air/salt-spray resistant.
Color Black or White (-WH)
Insert Points Ten M6 insert points on back panel.
Mounting Included swivel (pan) / tilt wall bracket provides continuously variable +/-80 degree left-right swivel aiming (at no up/down tilt -- see Bracket Guide for maximum swivel range at various up/down tilt angles), continuously adjustable ±15 degree tilt, as well as 5 degree fixed increment points within the range. Ten threaded mounting points located on back panel conform to industry standard rectangular 108 x 51 mm (4.25 x 2.0 in) pattern for OmniMount® 30.0 and other compatible third-party brackets. Threaded mounting points can be utilized for suspension.
Dimensions (H x W x D) 528 x 99 x 153 mm (20.8 x 3.9 x 6.0 in)
Net Weight 4.1 kg (9.0 lb)
Included Accessories Swivel (pan) / tilt wall bracket
Optional Accessories MTC-PC2 terminal panel coverMTC-CBT-FM1 flush-mount low-profile wall-mount bracket MTC-CBT-SMB1 Stand-Mount Bracket for use with 35 mm speaker stand



HARMAN Professional Solutions:

CBT 50LA-1

Constant Beamwidth Technology™ Line Array Column Loudspeaker