Cool vid!
I don't really have a professional sound system anymore, although my DVD movie rig would make a decent full range band PA for a small club of about five hundred seats if I added more power to it. It's only fifteen hundred watts, combined, but it will make you dance. My deck stereo would put out a good acoustic band (no drums) sound for about the same size club. Sound reinforcement was my business earlier in the game. I just do a little for friends and fun, these days.
What I call my "good stuff" is really a nice, smooth, musical, warm sounding system, which uses tube power and a tube preamp. I have an old Dual turntable and three disk players in the system, also. A trusty old Garrard table for 78s and a Revox A77 that I bring in and out of the system. I also have it all hooked to my computer via an M Audio 2496 card and I use Winamp. The best sounding disk player is a Sony 365 that has been modded, followed by a Denon 2900. The amps are minimalist SET design ( not my design, I fucking wish I was smart!) which only have eight solder joints in the signal path. An audiophile's dream if you are not a power hog. If I want to rock out, though, I use my movie rig.
My real pride is in the fact that I have designed an open back di-pole speaker system using high efficiency professional drivers combined with a modern "fullrange" driver, which works in conjunction with a unique set of outboard diffusion/dispersion panels/columns. The columns, which I need a name for, sit between the cabinets and the wall. They are acoustically inert, sort of. I can tune the wall effects, reflections and out front sweet spot by moving and angling the three sided column, thus manipulating the di-pole effect to a greateer advantage. Using a spectrum analyser and a reverberation (time domain) analyser, I can "tune" the system to any room. I have amazing control of room resonances, standing waves and cancellations with this set up.
I have actually been working on this idea for about twenty years and I'm in my eleventh generation, third of the present configuration, although I haven't done much with it in about five years. It sort of resembles an upright bass instrument, but the secret (and genius - a lot of people have built open back speakers since dynamic drivers were invented in addition to electrostatic dipoles) is in the concept and architecture of the outboard diffusion/dispersion column, so that's about all I'll say about that aspect here.
The enclosures each use two fifteen inch JBL drivers, which I have custom built and matched for smooth, extended response and control rather than all out power handling. (Yes, I have been coning, reconing, customizing and correcting speaker drivers since I was a teenager, working part-time in a music store.) They are aligned with a German Visaton eight inch driver for the mids and upper frequencies. I have occasionally toyed with Heil and a few other ribbon tweeters in various positions, but not using them, right now.
About eight years ago I had become really satisfied with my open back set-up and I began work on a truly high efficiency horn loaded system from scratch. (The bass is not horn loaded - maybe some day) I was done with the math and had some computer simulations of various parameters plotted out when my son was born. It was another year before I made my first prototype of the mid-range horns out of wood.
Martinelli Sound was my inspiration, many years ago.
Just over two years ago, I was done with the construction of the wooden midhorns, except for a fancy oil finish, which I did over the winter, and began the high frequency horns. I did much better software testing of my curves (hell, the programs are much better, now) on the highs and my first prototype was perfect, except for the phasing, which I have yet to complete, since my scope died. BUT, I got my scope up again, so I will get back to the task of perfecting the high horns and correcting the inner phasing plug inside the drivers. I just wish I could have the design perfected and hire a machinist to make the adaption/phasing pieces which mate the flare of the horns with the drivers. There is a small trick I play in this area, too, but high frequencies are much more critical anyway and a whole new set of problems rear their heads at the high compression that I am attempting. I am getting 104dB with one watt at one meter with my mids and bass cabinets.
Anyway, now you see why I seem like a complete, uncaring nutball in most ways. I am already distracted by something bigger than I and you maybe see why I need an oscilloscope. You also know better than to ask me about my sound system, now.