Single Driver Speakers
Thanks to Frater Perdurabo (Steve Fretz), Thorsten Loesch, John Wyckoff, Jan Hedlund, and others.
This is a collation of information from the internet and personal research. The information may not be accurate (did I really need to tell you that?). Opinions expressed here are my own. The reason for this page is to present my findings on single fullrange-driver speakers. I am not to be held responsible for problems caused by any information or misinformation presented here.
What is a single full-range driver speaker?
Full-range single driver speakers attempt to cover the entire audible frequency spectrum using only one driver unit. This removes the need for an electronic crossover network, well known for being hard to design without introducing colorations to the sound. Some people consider the crossover network one of the most evil things in audio. In practice, how well a single driver speaker delivers depends both on the driver and the speaker cabinet design. Lowther (UK) is one famous and well known full range driver, Fostex (Japan) is becoming popular in the USA and is well known in Japan and Europe. Other manufacturers that build full range drivers include Mitsubishi (Diatone), Jordan, Reps, Fertin, Supravox, Radio Shack, and many others.
Dick Olsher has a nice write up called Single
Driver Ecstasy that explains much about the magic of full range and wide
range drivers, especially those that cover the mid range spectrum. The
LothX USA distributor has a section describing the problems
of multi-driver speakers (and benefits of single drivers).
Not all of the drivers or speakers featured on these pages are true "single driver
full-range" speakers. Some (like the PHY-HP, Supravox, and Hammer
Dynamics) attempt to cover a large
part of the frequency spectrum, with only a super tweeter in addition,
and often with no electrical crossover network (instead using the
natural roll-off of the speaker driver and other acoustic methods). For a more
complete answer on single driver full-range speakers, see the Theory