Yesterday I took my car to a great shop in Mesa, AZ that has been using the Bit Tune with success for a while so I had them run the system to tune my Bit Ten.
I would like to quickly summarize my impressions from this new auto EQ unit.
(1) Time delay calculations work great. Vocals are centered exceptionally well.
(2) Frequency balancing L/R. In terms of balancing the frequency response between the left and right sides, this was able to do a much better job than I was able to do. I'm very happy with this, stereo imaging is superb.
(3) EQ and tonality: This is the weak part of the Bit Tune in my opinion. I am surprised by the EQ curves generated by this piece. While the 100Hz to 2kHz areas were relatively similar to what I had set previously the unit decided to do a good deal of boosting to frequencies less than 100Hz and higher than 2kHz. This resulted in an overly bright sound in my opinion. While the height of the soundstage with these settings is great it just doesn't sound natural. After I got home yesterday I initially brought everything down by about -2.5 db to avoid boosting at all cost. Afterwards things sounded much better without the overemphasized highs. I am going to go back now and fine tune the 2kHz on up area now.
Bottom line, Bit Tune system awesome for level and EQ matching L/R and time delay. I attribute this due to the 5 mic unit that is used to calculate the FR which uses spatial averaging. But... there are major problems with how it calculates the EQ curves especially the lows and highs.