Engineered for applications with limited plenum space incorporating a SoundTube-specific shallow backcan with an installed depth of only 3.5 inches. One 4 inch (102 mm) treated fiber woofer with cloth surround and one 0.75 inch (19 mm) silk dome tweeter. Easy-access six-position tap switch for 25/70.7/100-volt and 16 ohm transformer bypass position allows for easy ordering, stocking and installation. Reduced amplification costs with maximum efficiency including 87.5 dB sensitivity and 16 ohm impedance. Superior voice intelligibility with an average coverage angle of 100 (210 kHz, independently verified). Cost-effective 16 ohm settings allows for the use of multiples of two, four, or six speakers in a system using a standard amplifier without a transformer. Incorporates a painted steel grille for lasting durability. Ceramic input terminal accepts up to 10 gauge plenum rated signal wire and includes thermal fuse. Suitable for use in voice alarm applications subject to EU regulations EN60849 and BS5839-8. EN54-24 listed. Clamping allowance from 0.00 in. (0.0 mm) to 1.50 in. (38.1 mm). UL 1480 (UEAY) and 2043, CE (EMC Directive 89/366/EEC, EN55020, EN55013) approved.

Included accessories: Choose between a tile bridge or a pre-construction bracket, UL-listed 0.5-inch flex conduit clamp, paint shield and two wire nuts.

Specifications

Color	White
UPC	752830451483
Manufacturer	SoundTube
Manufacturer's Category	CM-EZ Economical In-Ceiling
Shipping Weight	5 lbs / 2.27 kg
Carton Height	5.5 in / 139.7 mm
Carton Length	9 in / 228.6 mm
Carton Width	9 in / 228.6 mm
Certifications	CE, EN54, RoHS, UL1480A, UL2043
Enclosure Properties	ABS, Sealed, Steel
Enclosure Volume	100 cu in / 1638.71 cu cm
Included Accessories	Conduit Clamp, Cover Plate, Grille, Paint Mask, Choose Between a Tile Bridge or Pre-Construction Bracket
Optional Accessories	White Grill (GRL-CM42-II-WH)|Tile Bridge (AC-CMEZ42-TB)|Pre-Construction Bracket (AC-CMEZ4-PCB)|Paint Mask (AC-CM-PM4EZ)|Junction Box (AC-CM-EZ-JBOX)
Source Inputs	4 Pin Ceramic Terminal
Backcan Diameter	5.78 in / 146.8 mm
Backcan Height	3.75 in / 95.3 mm
Coverage Angle (±6dB @ 2kHz)	95°
Crossover Frequency	5.0 kHz
Cutout Width/Diameter	6.5 in / 165.1 mm
Directivity Factor (Q) (Averaged 100Hz - 10kHz, @ 2kHz)	4.3 and 4.2
Directivity Index (DI) dB (Averaged 100Hz - 10kHz, @ 2kHz)	5.7dB and 6.2dB
Frequency Response (± 10 dB)	125 Hz - 22 kHz
Frequency Response (± 3 dB)	160 Hz - 20 kHz
Grille Properties	Standard-Flange, Magnetic, Powder-Coated, White, Paintable, Steel
Low Frequency Voice Coil	0.5 in / 12.7 mm
Low Pass Crossover	12 dB per octave 2nd order
Max. Ceiling Thickness	0.97 in / 24.6 mm
Max. Continuous Power RMS	20W
Max. Program Power	40 W
Minimum Impedance (Ω Ohms)	15.5 Ω
Network Type: High Pass	6 dB per octave 1st order
Nominal Impedance (Ω Ohms)	16 Ω
Tweeter Driver	.75" Silk Dome
Woofer Driver	4" Treated Fiber Cone w/ Cloth Surround
Sensitivity dB @ 1W/1M	87.5 dB
Sensitivity dB @ 2.83V/1M	84.5 dB
Tap Selector	Rotary Switch
Transformer Options	25 / 70.7 / 100 V, 16 Ohm direct
Transformer Taps Max. Setting (25V/70.7V/100V)	2.5W/20W/20W
Visible Diameter	7.5 in / 190.5 mm
Visible Height	0.33 in / 8.4 mm