If you have the room AND the money
http://www.wisdomaudio.com/products_grande.php
The Infinite Wisdom Grande is the pinnacle of our achievements, representing a milestone in the evolution of loudspeaker design. Unlike any other system ever produced, it was conceived for environments too large for other systems, including multi-level rooms in the largest homes and palaces, great halls and ballrooms. Employing stacked three section planar-magnetic arrays over 13 feet tall, low frequency assemblies over 8 feet tall and a total system weight of almost two tons, this is a monumental system.
Drivers (Planar Array Line Source) Six 75"x3" Planar Magnetic/Channel
Drivers (Low Frequency Regenerator) Twelve 12" Underhung 3" coil
Line Source Driver Weight 258 lbs. each channel
Low Frequency Magnet Weight 456 lbs. each channel
Frequency Response 10-25,000 Hz
Horizontal Dispersion Over 130 degrees
Vertical Dispersion 12' Line Source
Sensitivity 1W/1M Equivalent 91dB Equivalent Ratio
Line Source (Nominal Impedance) 5.5 ohms
Line Source (Minimum Impedance) 5.5 ohms
Low Frequency Regenerator Impedance Choice of 2, 4 or 6 ohms
Active Crossover Point (Planar Array and Woofers) 100 Hz
Active Crossover Point (Planar Array and Woofers) 600 Hz
Passive Components None
Required Channels of Amplification 12 (14 to 20 as an option)
Max. Power Handling (Planar Array Line Source) 6000 watts per channel
Max. Power Handling (Low Frequency Regenerator) 12000 watts per channel
Recommended Amplifier Power (Planar Array Line Source) 200-750 watts per channel (x4)
Recommended Amplifier Power (Low Frequency Regenerator) 600-6000 watts per channel
Complete System Weight 3800 lbs.
Line Source Cabinet (H" x W" x D") 160" x 21" x 60"
Low Frequency Cabinet (H" x W" x D") 102" x 32" x 48"