I happen to have a pair of blue FX66(Thanks Joker!) on hand to compare.
Essentially the same color blue. They sound like they are the same driver. The differences are...
Note: ~50 hours on the FX67(stock) and the FX66 has many more hours and paper filter removed from the sound tubes.
- IMO, I like the FX67 looks a bit more.
- I find the FX67 to fit better/easier (fit is subjective of course).
- The cables are near the same. The Y joint and cord slider are thinner and shorter on the FX67. The FX67 slider locks on to the Y joint like a cap. The strain relief on the FX67 are slightly thinner and more supple than the FX66.
- The sound is extremely similar. The FX67 with less burn in and the paper filters on the tubes has a slight more depth and is slightly more detailed/textured.
So basically the FX67 is the FX66 with refreshed look, improved ergonomics, slightly refined sound, and a much cheaper starting price.
Edited by jant71 - 5/6/10 at 8:03pm