I had the Dunlavy 1V for 5 years, with Krell. I sold the Dunlavy, still have the Krell. I audition Revel, Wilson, B&W 801-802. I heard this speakers for less than 5 minutes and I knew that they were a top contender. I would of never guess. The Infinity MTS Preludes, with the 850 watts self powered subs, down to 22 HZ . What a great speaker. All I can say is all you tube folks, looking for that base, this have self powered subs, you can run the towers with your tube gear. Speakers are very personal, so give it a try! Can get them from audigon for $5500-$6000, new $10K