NO SHIPPING - LOCAL PICKUP ONLY  About the Polk Audio RTi12 by Crutchfield'sTom Mathew Tower speakers don't get much better than this. The RTi12, sold individually, features an impressive driver array using the latest generation in Dynamic Balance® drivers: a redesigned 1" silk/polymer dome tweeter for stellar treble extension, dual 5-1/4" drivers for rock-solid mids, and three 7" woofers providing the earth-shaking bass rumble. These speakers move a lot of air, and dish out smooth, wide-open sound with extremely low distortion. Just pop in your favorite CD or DVD movie — you won't believe your ears. And they don't just sound great; the handsome real wood veneer (available in cherry or black oak finish) will be a classy addition to your room decor. The RTi12 includes Power Port Plus, the latest enhancement to Polk's Power Port technology. One front and one rear port work together with internal plates to reduce noisy air turbulence and increase bass efficiency. Plus, Polk's ARC (Acoustic Resonance Control) port technology ensures rich, natural mids. Other cool features include two sets of gold-plated 5-way binding posts for biamping or biwiring and anti-diffraction grilles for a large, open, three-dimensional soundstage with pinpoint-accurate stereo imaging. Adjustable spikes provide stability on both carpeted and hardwood floors. Pick up a pair of RTi12s for stereo music or for front left and right speakers in a home theater setup. Plus, you can add the RTi12 as surround speakers in a 5.1, 6.1, or 7.1 surround sound system. SPECS Cabinet & design Enclosure Bass Reflex Finish Wood veneer Color Black oak Connector type Dual 5-way post Bi-amp inputs Yes Driver details Tweeter type Dome Tweeter size (inches) 1 Midrange size (inches) 5.25 Number of woofers --- Woofer size (inches) The diameter of the woofer. 7 Woofer composition Polymer composite Woofer surround Butyl rubber Built-in powered pub --- Dolby Atmos drivers Audio specs Power range (watts) 50-500 Sensitivity 90 dB Impedance (ohms) 8 Frequency response 30-26k Hz