Polk Audio offers its Polk Audio 51" LSiM707 Loudspeaker
in Mt. Vernon Cherry (pictured) or Midnight Mahogany
with free shipping
. (To access the site, enter username "friends" and password "Friends4Life".) That's the lowest total price we could find by $1,000. It features a 38Hz to 30kHz frequency response, MDF enclosure with internal bracing, hardwood veneer cabinet finishes, 1" ring radiator tweeter, 3.25" dynamic balance midrange driver, and Cassini Oval subwoofer drivers.
Also available is the Polk Audio 47" LSiM705 Loudspeaker in Mt. Vernon Cherry or Midnight Mahogany for $749.98 with free shipping. That's the lowest total price we could find by $750. It features 22Hz to 40kHz frequency response, bi-amp capability, 1" tweeter, 3.25" midrange drivers, 5" woofer, and 5.25" polypropylene woofer.