The Thiel CS1.5 is a two-way speaker with a 1" metal-dome tweeter reproducing the highs and a 6.5" aluminum-diaphragm woofer covering the midrange and bass. Helping out the 6.5" driver is a passive radiator instead of the more commonly used bass port. Both of the active drivers are of high quality. The tweeter uses a large magnet, vented pole, and reinforced rear chamber to reduce resonances and increase bandwidth. The woofer uses an aluminum diaphragm for increased stiffness and cast magnesium chassis for rigidity. Two magnets weighing a total of 2.4 pounds are in the back. Like all Thiel cone drivers, the woofer for the CS1.5 utilizes a short-coil/long-gap system to improve linearity of response throughout the complete excursion of the driver.
One the first things that strikes you about the Thiel CS1.5s is the continuousness of the sound they generate. The word that kept cropping up in my notes was smooth -- no hills and dales in the frequency response from these guys. Thiel states that the crossover point for these two-way speakers is 3kHz, but Ill be darned if I can hear where that is. Thats way up there, where the birdies sing and most instrument fundamentals fear to tread. By avoiding the all-important center midrange, where our ears are most sensitive, and executing this passing of the baton in a time-and-phase-correct manner, the crossover of the CS1.5 is virtually invisible. The piano is one those instruments that gets up into stratosphere, so its a great instrument to give this crossover a workout. Mitsuko Uchidas incisive performance of Debussys 12 études [Phillips 422 412-2] shows how wide the range of the piano is. These pieces can serve as both keyboard exercises and standalone compositions. They utilize the entire range of notes the piano provides. Runs spanning several octaves flow freely and continuously, with no undue emphasis of any notes along the way.
Description: Two-way, floorstanding loudspeaker with passive radiator. Drive-units: one 6.5 inch metal-cone woofer, one 1 inch metal-dome tweeter. Frequency response: 42Hz - 22kHz, +/-3dB. Phase response: minimum +/-10, Sensitivity: 86dB/2.8V/m. Impedance: 4 ohms nominal, 3 ohms minimum. Maximum power handling: 150W.
Dimensions: 8.5" W by 11" D by 33" H. Weight: 42 lbs.