The cabinet of the Reference Studio 100 v.4 ($2599/pair), built of MDF, looks very much the same and still stands 44.5" tall. More internal bracing has been added to help reduce cabinet resonances, a difference a friend familiar with the sound of v.3 mentioned during an extended listening session. The v.4 is still a three-way loudspeaker with five drivers, though not the same ones. The new tweeter is a 1" Gold-Anodized Pure Aluminum (G-PAL) dome, vs. the older aluminum dome. The midrange driver is still a 7-incher, though now the cone is made of Paradigm’s Satin-Anodized Pure-Aluminum (S-PAL) instead of mica-polymer. The three woofers are all 7" polypropylene cones. The 100 is still quite narrow -- only 8.25" wide -- and the speaker is still 17" deep. The 100 has a port on the front and two pairs of five-way binding posts on the rear. The review samples were finished in black ash. At 36" wide, 9.5" tall, and almost 16" deep, the CC-690 v.4 ($1199 each) is the largest center-channel speaker I’ve ever used in my system, and took up a lot of space. It has six drivers: a 1" G-PAL dome tweeter, a 4.5" S-PAL midrange cone, two 7" S-PAL bass-midrange cones, and two 7" polypropylene woofers. The five-driver, three-way ADP-590 v.4 dipole surround speaker ($899 each) has two 1" G-PAL dome tweeters, one mounted on each side of the speaker, each just above one of two 4" bass/midrange S-PAL cones. The only driver that faces the listener is a 7" polypropylene woofer. For such a small speaker -- it measures 14.75"W x 8.68"H x 6.68"D -- the ADP-590 is surprisingly heavy at 17.5 pounds. It’s designed to be mounted on the wall (a small plastic bracket is included).

Paradigm Reference Studio 100 v.4 floorstanding speaker Price: $2599 USD per pair

Dimensions: 44.5"H x 8.25"W x 17"D Weight: 81 pounds each

Model: Reference Studio CC-690 v.4 center-channel speaker Price: $1199 USD

Dimensions: 36"W x 9.43"H x 15.56"D Weight: 69 pounds

Model: Reference Studio ADP-590 v.4 surround speaker Price: $899 USD each

Dimensions: 14.75"W x 8.68"H x 6.68"D Weight: 17.5 pounds each

This set of five speakers are in great condition. I do not have the original boxes for the left, right and center speakers. The surround speakers are in their original boxes and were hardly used.  A great home theater system at an exceptional price.