Bass woofer big magnet

Alpine 4 channel amplifier with JBL woofer in a heavy box. Original woofer with extra heavy magnet for deep bass. All in good condition

The Alpha 20 bookshelf speakers are aces when it comes to combining great sound, good looks, and compact size. Looks like Infinity did it again! They've been designing fantastic speakers for years, and it's their innovation, research and understanding of customers' needs that brought the Alpha 20 to life. Let's start with unique Infinity technology. The Alpha 20 boasts a 1" C.M.M.D. tweeter and a 6-1/2" C.M.M.D. woofer. C.M.M.D., or Ceramic Metal Matrix Diaphragm, is a material designed by Infinity to produce exceptionally stiff, light drivers — ideal when it comes to accurate, responsive reproduction of sound. This technology exists already in expensive, high-end Infinity lines, so it was ready to be reapplied in the more affordable Alpha line. Another area of Infinity expertise is detailed, natural sound. Thanks to their high-tech research facility, Infinity knows just about everything there is to know about audio. The Alpha 20s use those C.M.M.D. drivers to meet Infinity's exacting standards for great sound. You get clean, true-to-life highs that float through the air, and astoundingly rich, full mid/bass delivery. Product Highlights: • video-shielded • bass-reflex • frequency response 55-22,000 Hz (±3dB) • 8-ohm impedance • sensitivity 89 dB • handles up to 100 watts • black ash or cherry vinyl finish • 5-way binding posts • 8-7/8"W x 15-1/8"H x 11-3/8"D Why choose bookshelf speakers? Bookshelf speakers may be small in size, but they can deliver surprisingly big sound. Some ultra-compact models even fit on a desktop. Most are right at home in tight spaces like shelves, so they're usually good choices for your home theater's rear channels. For the best performance, try placing bookshelf speakers on solid speaker stands to help the sound really "open up." Made in DENMARK