The off-white SP5MAT 5.25" 2-Way 25/70V Speaker with Back Can from Speco Technologies is an all-in-one unit, which comes pre-assembled with back can and mounted transformer. The speaker features a coaxially mounted 1" dome tweeter, and the SP5MAT has a frequency response of 57 to 20,000 Hz and will handle 30 watts of RMS power. A quick-flip 70 or 25 Volt selector switch and an easy-select transformer wattage dial are both located on the front baffle of the speaker housing. The choice of 8 individual wattage tap settings covers a full range of uses. This flame-retardant ABS unit also comes with insulated wires and has an attached metal seismic safety loop and built-in easy mount tabs for securing the unit. The SP5MAT was designed to simplify installation for contractors in a time-efficient manner. The Multi-Application (MA) Series covers a wide range of commercial applications while retaining a uniform speaker appearance. The furnished 8 Ohm tap selector also means this speaker can be kept on-hand for unexpected multi-use residential installation needs. Frequency Response57 Hz to 20 kHz Low Frequency Driver5.25" Polypropylene woofer with rubber surround Magnet: 10 oz. ferrite High Frequency Driver1" Coaxially mounted Mylar dome tweeter Sensitivity87 dB (1W/1M) Impedance8 ohms Voltage70/25 V RMS Power30 W Maximum Power60 W Transformer Setting30 W, 15 W, 7.5 W, 2.5 W, 1 W, 0.5 W, 0.25 W & 8 ohms Baffle MaterialFire-resistant ABS Back Can MaterialFire-resistant ABS Grille MaterialMetal Wire Connection TypePush terminal Cutout Diameter8.38" (213 mm) Mounting Depth5.6" (142 mm) (minimum) Dimensions (Diam. x Depth)9.43 x 6.12" (240 x 156 mm) Weight4.5 lb (2.0 kg)