Driving a Thiel

Hevac1, the Thiels don't have a "wide Ohm range", in fact it's just the opposite.
Curio, the Thiels don't have a "long fall", see above.
Thiels can be run with some tube amps, but due to the load, tubes aren't the most cost efficient way to power them.

Unsound,
A speaker that can have loads down to 1 ohm is a wide range to me. Most amps are rated 8 to 4 ohms. not many have a lower Ohm rating in their specs. I have listened to a few amps with Theils and found most even if rated down to 2 Ohms cannot handle them.

Hevac 1...I am not sure where you get that the Thiel CS2.4 goes down to 1ohm...in the attached link, you will see that the speaker stays between 3 and 4 ohms from 100Hz to 50KHz and drops to 2.7ohms (min dip at 600 Hz). So a high quality 4ohm rated amp with 100wpc+ will drive the Thiel 2.4 very nicely. Here is the Impedance vs Phase vs Frequency plot from Stereophile: http://www.stereophile.com/images/archivesart/theC24FIG1.jpg

Hevac1, there's a difference between low range and wide range.

Cmalak,
What amp was used and would it have been able to go down to 1 ohm?
3 to 4 ohm is what Theil states their speakers low ranges are, even the 7.2 is only 2.7 ohm min.
It is a conservative estimate at best I think.
I had Theils a few years ago and found, the more power you have the better they sounded and the lower ohms the amp can handle the lower the bass would go regardless of rating.
BTW, I am not saying that Theils are not an excellent speaker. I am just saying that a quality amp with lots of power is best and a receiver will not do them justice.