| SM 28, SM 28T |
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| Audio/acoustic and electrical |
|---|
| Speaker type | 2-way, full range, indoor surface mount speaker |
| Frequency range | 59 Hz to 22 kHz, -10 dB, full space (per IEC 60268-5) |
| Frequency response | 67 Hz to 17.5 kHz, +/- 3 dB full space |
| Power capacity | 90 W (rms) continuous pink noise (per IEC 60268-5)
180 W (rms) continuous program |
| Rated maximum input voltage (MIV) | 25.1 V (78.9 W at 8 ohms) per AES2-2012) |
| Maximum SPL | 108 dB, 1 m (based on MIV)
109 dB, 1 m (linear) |
| Nominal sensitivity | 87 dB SPL, 1 W, 1 m, full space (per IEC 60268-5, 60 Hz to 20 kHz) |
| Nominal coverage angles | Horizontal: 105° (1 kHz - 4 kHz, weighted 2 kHz - 4 kHz)
Vertical: 60° (1 kHz - 4 kHz, weighted 2 kHz - 4 kHz) |
| Nominal impedance | 8 ohms |
| Crossover frequency | 2.0 kHz |
| Rotary switch taps (SM 28T only) | 70 V: 64 W, 32 W, 16 W, 8 W, Off, 8 ohms direct
100 V: null, 64 W, 32 W, 16 W, Off, 8 ohms direct |
| Woofer | (1) 8" (203.2 mm) polypropylene cone |
| Tweeter | (1) 1.1" (28 mm) silk dome |
| Overload protection | Full range power limiter protecting the tweeter, woofer, and crossover |
| Input connectors | |
| Speaker | 2 recessed pins (mate to receptacles on mounting plates) |
| Mounting plate | (1) Euro-style captive screw terminal block, 4 pole |
|
| General |
|---|
| Package | 2 speakers (1 pair) with mounting kit package |
| Ambient temperature/humidity | Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing |
| Mounting | Wall mountable with included mounting plates |
| 0° mounting plate | Fixed 0° |
| 10° mounting adapter | Fixed 10° up, down, left, or right, based on orientation of adapter |
| Yoke mount (optional) | Up to 90° upward/downward or left/right, in 10° steps based on orientation of yoke |
| Enclosure type | Plastic, trapezoidal, with molded grille and bass reflex ports |
| Enclosure outer dimensions | |
| Speaker only | 16.50" H x 11.50" W x 7.28" D
(41.91 cm H x 29.21 cm W x 18.49 cm D) |
| With 0° mounting plate | 16.50" H x 11.50" W x 7.80" D
(41.91 cm H x 29.21 cm W x 19.81 cm D) |
| With 0° mounting plate attached to 10° mounting adapter | Orientation: vertical, angled 10° down
16.78" H x 11.50" W x 10.16" D
(42.63 cm H x 29.21 cm W x 25.81 cm D) |
| Product weight | |
| SM 28 |
| Speaker only | 10.1 lbs (4.6 kg) each |
| With 0° mounting plate | 10.9 lbs (5.0 kg) each |
| SM 28T |
| Speaker only | 12.0 lbs (5.4 kg) each |
| With 0° mounting plate | 12.8 lbs (5.8 kg) each |
| Shipping weight | |
| SM 28 | Pair: 30 lbs (14 kg) with mounting kit package |
| SM 28T | Pair: 33 lbs (15 kg) with mounting kit package |
| Regulatory compliance | |
| Safety/EMI | CE |
| Environmental | Complies with the appropriate requirements of RoHS and WEEE. |
| Product warranty | 5 years parts and labor |
| NOTE | All nominal levels are at ±10%. |
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| NOTE | Specifications are subject to change without notice. |
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| (4031-D5-060517) |