Hi streakn,
I'm afraid my solution is a rather expensive investment.
I'm a professional live sound engineer, and we use audio equipment that would probably cost about $1,200 per room... $2,000 if you added a subwoofer.
Just for the record, here is what we would use:
2 x JBL Control 28 speakers per room - $350 per pair
1 x JBL Control SB210 Subwoofer - $465
1 x Crown XLS 202D 2-Channel Power Amplifier for JBL Control 28's- $300
1 x Crown XLS 402D 2-Channel Power Amplifier for JBL Sub - $400
1 x Yamaha MG82CX 8-Channel Audio Mixer - $160
Total - $1,675 (and that's not including the cabling you would need).
Some of the best prices available to individuals who are not dealers or reps for the above gear can be found at
B&H Photo Video | Digital Cameras, Camcorders. I get my discounts through work, of course. But I have purchased from BH before, and have had good service. They also have good pics of the gear I have listed above.
All speakers are small, compact, and built for indoor/outdoor use... we use them for the Oakland California Zoo Lights Festival during December through January.
It sounds like you have come up with a solution that works for your haunt.
However... if you are ever interested in making the investment - just for one room (even if it's not until next year), then please feel free to PM me... I'll walk you through it. You'll need plastic surgery to remove the smile from your face.
Cab