STS-500 (400-4047) Specifications Faxback Doc. # 6496 Frequency Response:..........................................60-20,000 Hz Power Handling:...........................................130 Watts (RMS) Maximum Power:..................................................260 Watts Efficiency:..............................................90 dB SPL (1W/m) Impedance:.........................................................8 Ohms Speaker Complement:...................Two 10-Inch High-Compliance Woofers 5-Inch Ferrofluid Cooled Midrange 3-Inch Wide Dispersion Tweeter Enclosure:................Tuned Port/Bass Reflex Design, Removable Grille Dimensions (HWD):.........................37 13/32 x 11 13/32 x 11 Inches (950 x 290 x 280 mm) Shipping Weight:.........................................38 lbs (17.2 kg) (LB/all-7/6/94)