Matched pair of Mirage M-1si Loudspeakers - See pictures for condition. Cabinets have been refinished, new binding posts.Local Pickup 18472. Very large and heavy.From stereophile.com: Three-way, reflex-loaded, bipolar loudspeaker system. Drive-units: two 1 (25.5mm) titanium hybrid-dome tweeters, two 5 (127mm) injection-molded polypropylene-cone midranges, two 8 (203mm) Polyflex treated, carbon-filled polypropylene-cone woofers with 1.5 (38mm) voice-coils. Crossover frequencies: 400Hz, 2kHz. Frequency response: 25Hz–33kHz ±2dB (on-axis), 25Hz–20kHz ±2dB (30° off-axis). Usable bass response: –10dB at 17Hz. Sensitivity: 82dB at 2.83V (1m), anechoic, 86dB in-room. Nominal impedance: 6 ohms, 4 ohms minimum. Amplifier requirements: 150–500Wpc RMS.