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Soundtube RS42-EZ-BK 4in Coaxial Open-Ceiling Speaker / 16 Ohm / 140 Hz – 22 kHz / Black

SKU: RS42-EZ-BK
Brand: Soundtube
$233.00
Brand Soundtube
SKU RS42-EZ-BK
Weight 7.00 lbs
Warranty 3 Years
Condition New
Status Available
Expert

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Description

The RS42-EZ is a 4 inch coaxial open-ceiling speaker engineered for distributed audio in open plenum and exposed-ceiling environments. It delivers clear full-range coverage from 140 Hz to 22 kHz and is offered in a paintable black finish. The enclosure and components are weatherized for indoor and covered outdoor installations.

The speaker features a 4 inch polypropylene low frequency driver and a 19 mm silk dome high frequency driver with BroadBeam Ring technology for consistent high frequency directivity. A 6 position tap switch with transformer bypass supports both low impedance and 25/70.7/100 volt constant-voltage systems. The unit includes a built-in hanging bracket and screw-on locking cover plate for secure mounting and fast deployment.

Performance specifications include a nominal impedance of 16 ohm, sensitivity of 84 dB @ 2.83 V/1 m, rated RMS power of 20 W and a 40 W program power handling. The speaker achieves a maximum SPL of 100 dB at 1 m and maintains usable response down to 140 Hz (-3 dB). The internal network uses a 4.5 kHz crossover, 12 dB/octave low pass and 6 dB/octave high pass sections to preserve clarity across listening zones.

Connectivity is provided via a 4 position ceramic terminal block input connector and a 6 position rotary tap selector with a transformer bypass position for direct voice coil operation. The included 20 W transformer supports 25/70.7/100 V taps for integration into distributed paging and background music systems. The cover plate enables direct-to-conduit mounting while the hanging hardware includes galvanized steel cables for suspended installations.

Typical applications include retail and hospitality open-ceiling zones, covered outdoor areas, transportation terminals and paging/voice evacuation circuits where background music and clear speech reproduction are required. The 16 ohm impedance option simplifies daisy chaining in low-voltage installations while transformer taps allow easy integration into constant-voltage infrastructures. Weatherized components extend usable deployment options to covered exterior locations.

Constructed from injection molded ABS with glass fiber reinforcement and a powder coated aluminum grille, the RS42-EZ emphasizes durable, code-listed construction. It includes a built-in thermal fuse and ships in recyclable packaging. UL 1480 UEAY and UL 2239 listings plus CE and RoHS approvals support compliant specification and long-term reliability.

Specifications

System Type4.0" Coax open-ceiling ported, 20W transformer, 25/70.7/100V or voice coil direct
Impedance (nominal)116 ohm
Sensitivity dB @ 2.83 V/1 m84.0 dB
Sensitivity dB @ 1 W/1 m287.0 dB
Frequency Response (- 3 dB)3140 Hz - 22 kHz
Frequency Response (- 10 dB)3100 Hz - 22 kHz
Max. Program Power440 W
Max. Continuous Power RMS520 W
Max. Power SPL @ 1 m6100.0 dB
lap Selector6 position rotary switch, transformer bypass
Transducer - Low Frequency Driver102 mm (4 in) polypropylene cone, butyl rubber surround
Transducer- High Frequency Driver19 mm (0.75 in) silk dome, Beam Ring
Low Frequency Voice Coil25.4 mm (1.00 in)
Crossover Frequency4.5 kHz
Network Type: Low Pass12 dB per octave, 2nd order
Network Type: High Pass6 dB per octave, 1st order
Enclosure MaterialInjection molded ABS, glass fiber reinforced
GnlloPowder coated aluminum
Inputs4 position ceramic terminal connector
ColorsBlack, white, paintable
Height199.6 mm (7.86 in)
Diameter189.5 mm (7.46 in)
Weight1.8 kg (3.9 lbs)
Shipping Weight2.7 kg (6 lbs)
PackagingOne per box
Included AccessoriesHanging hardware, weather plug, cover plate
Optional AccessoriesN/A
Regulatory - ULUL 1480 UEAY, UL 2239 listed
Regulatory - CEApproved
RoHSApproved

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