This gives a larger sweet spot for home cinema and stereo listening. Each speaker contains a 1-3/16" ceramic graphite tweeter, 5-1/2" magnesium midrange and a 6-1/2" aramid/carbon composite sheel woofer in a laminated MDF baffle for a full range of sound. The EX Series bass driver ensures an accurate low frequency response with minimal distortion. An adjustable treble contour control allows for a high frequency output to match anyones preference. The Pioneer Elite EX S-IW691 is designed to compliment the floor-standing EX models to complete a home theatre system, or as a stereo setup. There is also a Pioneer Elite EX S-IW691L model, which has a second woofer in a LCR configuration.