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Introduced in the late70s and early 80s, Infinity's "Reference" line are well known for their use of EMIT.

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Introduced in the late70s and early 80s, Infinity's  "Reference" line are well known for their use of EMIT (Electro-Magnetic Induction Tweeters), EMIM (Electro-Magnetic Induction Mid-ranges, on the RSI and RSII), and dual-voice-coil Watkin's Woofers (and the first use of Poly-Propylene woofer cones).

A variation of "ribbon tweeters", the EMIT and EMIM drivers use Samarium-Cobalt magnets to covered by a thin diaphragm, and were noteable at the time for their flat-response to well above 25KHz.

Dimensions (II A / B): 140 x 58 x 28 cm
Weight (system): 90 kg
Bass: 2 x 25 cm
Mids: 3 x EMIM
Highs: 3 x EMIT (one on the back)
Suggested for amplifiers with (II B): 75-300 Watts per channel
Frequency range (II B): 25 Hz - 32 kHz
Crossover frequencies (II B): 150 Hz, 800 Hz, 4000 Hz, 8000 Hz
Special: equalizer for bass drivers

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