First of all, I would like to thank Bryan, Jerry, and Don for coming over to help me compare the 20-39CS, 20-39CS+, and the CS Ultra. The Review System: Pre amp: harman/kardon AVR80II DD Processor: Sony SDP-EP9ES Main Amp: Parasound HCA 2003A Center Amp: Parasound HCA 1000A Surround Amp: Parasound HCA 1000A Sub Amp: Samson S1000 DVD Player: Panasonic A110 Power Conditioner: Monster HTS 3500 DAC: Cobalt 307 Main Speakers: NHT 2.5 Center Speaker: NHT Superone Surround Speakers: NHT Superones Subs: SVS 20-39CS+, SVS CS Ultra 20-39CS+ First Impressions: My CS+ arrived on Thursday January 31st. One of the first things I noticed was the weight of the CS+. I believe that it weighs about the same as my Ultra. The next thing that I noticed was the new removable grill assembly. The new grill is definitely an improvement over the “screwed down” approach that is used on my Ultra. Otherwise the Two subs are identical in appearance. 20-39CS+ Hookup and Listening Tests: The setup of the CS+ was quite simple due to the Bettercables cable that SVS includes with the Samson amp. I did experience the dreaded ground loop problem but this was easily remedied with a cheater plug from Radio Shack. Once things were setup and calibrated (78db on the Video Essentials DVD), I had a chance to listen to the CS+ for the first time. My first impression with music and movies was that this sub sounded very much like my Ultra in its speed, articulation, and depth. I was truly impressed that SVS was able to create a sub this close to the Ultra in performance at a price so low. Without doing any measurements, I would say that the CS+ is more like 90-95% of the Ultra. 20-39CS vs. 20-39CS+ vs. CS Ultra: On Saturday February 9th, BryanZ brought over his 20-39CS/S700 to compare it to the CS+. Bryan’s CS was approximately 6 months old. One thing that I noticed was that the CS was a bit lighter than the + and Ultra. Coming in to this, I had never heard a regular 20-39CS. I was really expecting the + and the Ultra to walk all over it. I must say that the CS was extremely impressive and really held it’s own against the other two. We listened to the beginning of Toy Story 2 to do our comparison. The first two tracks of this DVD have some serious bass. Unfortunately, my bass test disc had not arrived in time for the comparison so we were unable to get good test data using frequency sweeps. First off, we calibrated all the subs to 80db using the Radio Shack meter. The CS was amplified by the S700 and the + and ultra were powered by the S1000. On the opening track of TS2 we were able to get the CS to bottom out at reference level in my 2400cu ft room. The + and Ultra did not bottom out at this level. We then recalibrated the three subs at 78db and replayed the intro to TS2. This time the CS did not bottom out at reference level and we were able to measure a very impressive 110 db at the listening position. Next up was the CS+ which delivered and impressive 111 db at the listening position. The Ultra was up next and it delivered 112 db. All three were loud and low. I was very surprised to see that the CS was able do deliver such impressive levels in my room. I was less surprised that the CS+ and Ultra were so close in performance. On other material I noticed that the sonic signature of the SVS subs was very similar. I really don’t think that I could tell the + and the Ultra apart if I was blind folded and they operate very well together. I did not get a chance to use the port plug. Conclusion: I was very impressed with the CS and the CS+. The CS exceeded all of my expectations. To my ears, the CS+ and the Ultra are so close in performance that I could not justify the $400 extra for the Ultra. We did not however, push the CS+ and Ultra to bottoming out. So there is no way of knowing if the Ultra would have an advantage. The Ultra did have a 1db advantage over the CS+ on the track that we measured and may be able to play louder without bottoming out. However, when you figure that you can almost buy two CS+ for the price of one Ultra the choice becomes a no brainer in my opinion. The CS+ is definitely the bang for the buck leader in the SVS line up. Those that have the money and want the best that SVS can offer will buy the twin Ultras. I love my Ultra and it does out perform the + but not by much. The comparison did tell show me one thing for sure. From top to bottom, there is no better value in bass than SVS.