I wouldn't have posted it without checking.
Anyone know What this thing is? Strange description on echo
http://echohifi.com/details/8384/Pioneer_SR-303
Scizzro,
I recall seeing something like that in my cousins' stereo system when our family visited them when we were kids in 1984.
If I'm correct, it's a device that adds a sort of roomsound/reverberation to the playback. I'm just making a guess, but I remember seeing something that was identical to that receding oval hole on the device my cousin had.
As music played, the different steps going back inside would light up in and out at different intensities, level by level, and respond interactively with the music. I remember switching the effect on and off and marveling at how the music sounded so echoey and cavernous sounding when it was on.
Of course, it now seems to me that the effect was way over the top and highly artificial, but it was neat to my young ears.
Now, I could be totally wrong. Even though that receding oval hole looks very familiar, I actually though my cousin had a Carver system, and the holographic device was also a Carver - I recall some catchphrase like Sonic Holography, or something like that. It's been so long now... Maybe a shared technology with Pioneer?
Hope you get a better read on what it is.