Snell Sub 1800

Pair of these rare big and beautiful Snell Sub 1800s in nice condition, they have their signs of light use.
$975 per sub or make me an offer for cash on pickup in Westfield MA
SUB 1800: Reflex-loaded (fourth-order) subwoofer with 18" cast-frame driver. Frequency response: 17Hz–80Hz ±2dB anechoic. Impedance: 8 ohms nominal, 7.5 ohms minimum. Sensitivity: 88dB/W/m. Amplifier requirements: 90–400W.
Dimensions: 21.5" W by 45" H by 16.5" D. Weight (shipping): 150 lbs each.Price: $2499 each

Kevin Voecks, who recently left Snell to start his own company, designed the system's SUB 1800 subwoofer to deliver bass down to 20Hz in large listening environments, but to be a separate enclosure so it can be moved to the best spot—say, in a corner or against a wall—without worrying about the midrange imaging.

The subwoofer meets THX specifications of 105dB output at 1m for most environments, including the top specification for a 9000 cubic-foot room. Tom Norton (footnote 5) called this a "brute-force design." It uses a single 18" driver in a fourth-order bass-reflex cabinet with a front-mounted port. TJN described the subwoofer's port extending to the back of the cabinet, then turning 90° to run farther internally. The cone driver has a resonance of 28Hz and the port has a resonance of 14Hz. This 18" driver has a 3" excursion, and is equipped with two spiders to prevent twisting when driven with large signals. The subwoofer cabinet can be positioned on its narrow or long sides. With the subs mounted on their sides, as TJN had them in his Snell Music & Cinema review, the 18" driver and the port are equally close to the floor. Tom indicated that this may deliver the most bass reinforcement. One can also mount them vertically, with either the port or the driver closer to the floor

Read more at http://www.stereophile.com/floorloudspeakers/snell_acoustics_type_a_reference_loudspeaker/index.html#y8gDq5qUtouJ3hdi.99