04-14-09: Clio09
If you highly value timbre in a speaker design, you really need to listen to the Audiokinesis Jazz Modules or Dream Maker speakers.
In the writeup on its Jazz Module, Audiokinesis writes:
Natural timbre arises from smooth frequency response, but to really get the timbre right requires attention to both the on-axis response and the summed omnidirectional response. The summed omnidirectional response is often called the power response and is important because it dominates the spectral balance of the reverberant sound (which in turn dominates the perceived tonal balance in most in-home applications). Its not enough just to get the first-arrival sound right. In the Jazz Modules we have gone to great lengths to also get the reverberant sound right, using a constant directivity waveguide crossed over to a 10" woofer where their directivities converge.
Audiokinesis' description confirms my experience at home. I'm a long time owner of Mirage loudspeakers, both from their Bi-polar and Omniguide series. In December 2004 my wife & I got married in the living room of our house. We had live acoustic music for the ceremony and afterwards. A couple months later I brought in a pair of Mirage Omnisats for evaluation for a neighbor's system that I was putting together, and my wife and I marveled at how "real" these speakers sounded. To sound "real" they have to be timbre-correct, and to do that, they have to energize the room as live musicians do. With the recent memory of our wedding, it was apparent that these speakers energize the room (the power response) in this manner.
While a loudspeaker can't duplicate the dispersion pattern of every instrument, the latest generation of Omniguide Mirages imitate this pattern *on average*, and it's based on nearly 30 years of research and testing. You get more imaging than the typical omnidirctional speaker because the Mirages throw at least 60% of the energy forward, but--just as with live music--the entire listening area is a workable sweet area with no lobing or venitian blinding artifacts of conventional speaker dispersion patterns.
Audiokinesis is obviously on to this phenomenon, as is Mbl, Gallo, James speakers, and a few others. Some of the conventional speaker companies add a rear-firing tweeter on some models (e.g., Snell) to improve timbre accuracy as well.