Audiophile Prelude loudspeakers with home theater center channel. Over $12,000 retail price, asking $3,500 SPECIFICATIONS: Description: Modular four-way moving-coil loudspeaker (three-way tower with powered subwoofer). Prelude MTS tower: Drive-units (all ceramic-aluminum matrix): 1" dome tweeter, 3*"-cone midrange, four 5*"-cone midbass. Crossovers: 300Hz, 2kHz, 24dB/octave. Frequency response: 80Hz-22kHz, ±3dB; 100Hz-20kHz, ±1.5dB. Nominal impedance: 4 ohms, ±1dB. Sensitivity: 90dB/2.83V/1m. Power requirements: 25-500W. Dimensions: 37" H by 6*" W by 7*" D. Weight: 32 lbs. Prelude MTS powered subwoofer: Drive-unit: 12"-cone ceramic-aluminum matrix. Maximum amplifier output: 850W continuous, 2600W peak (into 8 ohms, 20-100Hz, <0.1% THD). Frequency response: 23-80Hz, ±3dB; 30-80Hz, ±1.5dB. Crossover frequency: 80Hz. Dimensions: 20" H by 9*" W by 20*" D. Weight: 60 lbs. Prelude MTS System: Frequency responses: 23Hz-22kHz, ±3dB; 30Hz-20kHz, ±1.5dB. Impedance: 4 ohms, ±1dB. Sensitivity: 90dB/2.83V/1m. Recommended amplifier power: 25-500W. Second- and third-order harmonic distortion: 20Hz-20kHz at 95dB SPL, ±1%. Crossover frequencies: 80Hz, 300Hz, 2kHz, 24dB/octave.