The SoundTube CM52S-BGM-II is a high-efficiency 5.25” coaxial two-way in-ceiling speaker engineered for installations with limited plenum space. With a SoundTube-specific shallow back can of just 3.5 inches, this speaker is ideal for commercial and public spaces where ceiling depth is restricted.
Featuring a polypropylene woofer with rubber surround and a 0.75” silk dome tweeter, the CM52S-BGM-II delivers clear mid-range and full-range audio using Beam Ring™ technology. The tuned port baffle enhances bass response down to 65 Hz (-10 dB), while the six-position tap switch with transformer bypass enables flexible 25V, 70.7V, or 100V system integration.
The speaker’s painted steel grille ensures durability and aesthetic integration, while its constant-tension fixed-wing mounting system with included color-coded tile bridge allows rapid, secure installation. Optional pre-construction brackets and custom grille colors make it adaptable to any project.
SoundTube CM52S-BGM-II Key Features
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5.25” polypropylene woofer with rubber surround and 0.75” silk dome tweeter
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Beam Ring™ technology for mid-range clarity and smooth off-axis performance
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Six-position tap switch with transformer bypass for 25/70.7/100V systems
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Tuned port on baffle for enhanced bass response down to 65 Hz (-10 dB)
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High-efficiency design: 84.5 dB sensitivity, 16 Ω impedance
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Shallow back can: 3.5-inch installation depth
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Painted steel grille for lasting durability
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Adaptable to ceiling thicknesses 0.035–1.6 inches (0.9–40.6 mm)
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UL 1480 and 2043 approval pending
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Included accessories: color-coded orange tile bridge, UL 0.5-inch conduit clamp, paint shield
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Optional accessory: pre-construction bracket (AC-CM4-PCB)
Ideal Applications
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Airports
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Boardrooms
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Churches
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Education facilities
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Hospitals
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Hotels
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Restaurants
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Retail stores
The CM52S-BGM-II is perfect for high-performance audio in shallow-ceiling installations, offering clear sound, broad coverage, and easy installation.
Soundtube CM52S-BGM-II Specifications
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Low Frequency(-10 dB)
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65 Hz – 22 kHz
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Sensitivity
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87.5 dB
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Power Capacity RMS
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20 W
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Max SPL dB @ 1 M
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100.5 dB
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Nominal Impedance
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16 ohm
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Tweeter
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0.75 in. Silk
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Woofer
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5.25 in. Poly
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Connections
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Four position ceramic terminal strip
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Visible Height
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8.4 mm (0.33 in.)
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Visible Diameter
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298.5 mm (11.75 in)
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Back can Height
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95.3 mm (3.75 in.)
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Back can Width
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245.6 mm (9.67 in)
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Weight
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3.6 kg (8.0 lbs.)
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