REDUCED! Demo pair, factory boxes Latest breakthrough enormously improved by what we call our XTC™ technology, for eXtended-bandwidth Time Coherence
Rio III Concentrated state of the art
Application(s). Time-coherent 2-way speakers sounding best on stands.
Room size. Small to medium, 100-500sf (10-50 sq. m).
Power. 1Watt peak is too loud for conversation at ten feet (3m) on all models, except original Rio at 4W; All models max 120W peak (amplifier's 8-Ohm output) on dynamic recordings; 80W peak on compressed rock recordings.
Response. In-room, flat +/- 1.5dB 50Hz to 20kHz; Useful response to below 45Hz.
Distortion. <0.5% harmonic 100Hz-24kHz, <1% intermodulation, both at 98dB at 1m (I.M.D. is for any two frequencies separated by a 10:1 ratio).
Phase shift. +/- two degrees from 50Hz to 12kHz, acoustically for all models, except original Rio +/- two degrees from 300Hz to 12kHz. Does not vary with loudness.
Time Delays. At high frequencies <10µs, at low frequencies <100µs for all models except original Rio at high frequencies <50µs, ar low frequencies <5ms.
Rise time. <10 microseconds, positive or negative input. Does not vary with loudness.
Polarity. Positive, over full bandwidth.
Dispersion. Omni at 47Hz, smoothly decreasing to cardioid at 12kHz.
Impedance. 4.1 to 7.3 Ohms 100Hz to 20kHz. Treat as a 4 Ohm speaker. Impedance does not vary with loudness. (See Impedance Chart in the Rio Gallery.)
Sensitivity. 91dB for 2.83V at 1m, at sea level, all models. However, models with XTC™ sound 95dB efficient on music, because it maximizes musical peaks. All models are Dynamically Linear within 0.5dB to above 100dB.
Max SPL. From dynamic recordings: 108dB peak. From compressed rock recordings: 103dB peak; stereo pair. first-arrival sound (without room gain/room reverb), ten feet (3m) away.
Pair matching. Amplitude +/- 0.25dB and Impedance +/- 0.15 Ohms, from 100Hz to 10kHz; All crossover parts within +/- .15%.
Re: Green Mountain Audio RIO III
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