Vintage 90’s Polkaudio Bookshelf Loudspeakers S4

S series offers upcompromised performance with unmatched value. The S4 employs the new SL5000 Dynamic Balance 1" drive unit in a vented cabinet. The smallest bookshelf model in the S series, the S4 offers big performance. Julian Hirsch, writing for Stereo Review, said: "The S4's measured performance was exceptional, especially for its size and price. In particular, its frequency response over most of the audio range was among the flattest we have ever measured from a speaker." Driver Complement Tweeter Quantity 1 Diameter 1" (2.54cm) Type dome tweeter Midrange Quantity 1 Diameter 6 1/2" (16.51cm) Type ported Electrical Total Frequency Response 32Hz - 25kHz Upper -3dB Limit 23 kHz Lower -3dB Limit 50 Hz Nominal Impedance 8 ohms Efficiency 91 dB Recommended Amplifier Power 20 - 100 watts per channel Dimensions Cabinet Dimensions Height 15 1/2" (39.37cm) Width 9 1/2" (24.13cm) Depth 7 1/4" (18.41cm) In excellent condition normal wear and tear. Located in north Portland near peninsula park (700 N Rosa parks way, pdx 97217)