What does the BBE voodoo box claim to do (besides magically make sound and/or video 'better')?
Here is a link to the BBE site. Scroll down to the consumer electronics part for details.
http://www.bbesound.com/technologies/BBE_HDS/
According to the manual, here is what it does:
"The BBE Process imparts a pre-determined phase correction to the high frequencies where most harmonic information exists. This is done by breaking the signal into three sub-bands or groups: the low frequency group which is crossed over at 150hz, the midrange group which is crossed over at 1200hz, and the high frequency group that handles everything else up to 20K hz. The low group is delayed about 2.5 milliseconds via a group delay within a passive low pass filter. The front panel control allows for either a flat response or a boost of the lows at 50hz. The midrange group is delayed only about .5 ms and passes through an active band-pass filter while the high frequency group is passed through a high quality VCA (voltage controlled amplifier). The high group is used as a point of referency to make dynamic amplitude correction to the high frequencies. The RMS average loudness detectors continuously monitor bothe the midrange and high frequencies to compare the relative harmonic content levels of the two bands and apply the appropriate amount of control voltage to the VCA, thereby determining the amound of high frequency harmonic content present at the final output of the BBE processor."
Whew.
I originally experience BBE with my Alpine car stereo. I was looking for a way to essentially have a variable loudness control for my home setup. The 362 and 482 Sonic Maximizers are processors typically used in production and live shows, and have far more control than the BBE's in mobile audio. The 'low contour' and 'process' controls of the BBE can boost the bass and increase subjective brightness in a continuously controllable manner for low volume listening, creating a natural sounding tonal balance. (I needed this due to music addiction combined with sleeping housemates.) In this capacity, the BBE is great. However, I found that when listening at normal (for me, loud) volumes, that I preferred the sound with the BBE in the signal path, with much lower settings, to that without BBE in the mix. Granted, like most eq's, it is easy to over do things, but with the controls set at lower levels the effect was subtle but noticeably better. Specifically, it brings the soundstage up closer and creates added definition and realism to instruments, makes the soundstage more pronounced, and generally creates a more exciting sound. I've heard what it does described as "eyeglasses for your music", which is a good analogy. It doesn't really alter the tonal balance if used judicously, and can create a sense of 'air' and presence which is highly addictive, a very lively effect.
I have a very resolving system already (Yamaha S1700, older Sony ES cd player for sources, NAD C372, active crossover, and M&K 2.1 setup...it's pretty darn nice sounding straight up). The BBE, with modest settings, really takes it to another level. The difference is even more dramatic on lesser systems (perhaps because they have more room for improvement), and I have added BBE's to my thrashed upon living room system, as well as to friend's and family's systems as a cheap but signifigant improvement. Everyone I have turned on to the BBE is a believer, and rarely if ever run them out of the signal path.
I had discussions with Barry Ober at M&K (RIP...such a shame), and he too likes what the BBE can do, but suggested that I try out the Aphex 204. That unit also does phase/harmonic mystery voodoo, and is kind of like a BBE on steroids. I found the over-abundance of controls, and the fact that you have to adjust it for each different album, that the BBE is much more practical, although the Aphex is a highly habit forming toy. Here is a quite thorough review from Secrets on the Aphex:
http://www.hometheaterhifi.com/volume_11_3/aphex-204-big-bottom-7-2004.html
The BBE Sonic Maximizer may seem gimmicky, but it really does enhance the subjective experience. And they are only $80 at your local Guitar Center store. Anyone looking for an inexpensive yet dramatic enhancement should check 'em out, even if just out of curiousity.