The Series III builds on improvements made to the Series II for an even higher level of performance. The new design features an extensively revised power supply based on current-sourced shunt regulator technology that minimizes impact on the audio signal by eliminating high voltage gain. Far more precise power regulation yields dramatically improved rejection of noise and AC fluctuation. The completely redesigned high current gain stage utilizes newly available FET technology developed for green technologies such as solar panels and electric cars that require a normally-on state. Unlike MOSFETs that need to be biased on, normally-on devices operate more like vacuum tubes in the audio output stage, with simpler circuits that continuously conduct current, resulting in a more tube-like sound. The high-current gain stage has been further optimized for linearity with zero global negative feedback in the circuit. Also included in the upgrade are new specially selected audiophile grade capacitors and a fully bi-directional RS-232 control interface for increased compatibility with modern home theater systems. Enhancements to the Series III result in an even higher level of coherence, integration and transparency of sound, with dramatically improved mid-bass and midrange, and a more tube-like sonic character. Vacuum Tube Complement 2 x 12AU7 Inputs 4 pairs balanced/XLR or RCA single-ended, 4 pairs single-ended/RCA Outputs 2 pair balanced out, 2 pairs single-ended RCA out, 2 pairs single-ended RCA buffered Tape Out Remote control functions Power, Source Select, Volume up/down, Mute, Fade, Balance Control, Phase Reverse Gain Balanced in and Balanced out: 19.2 dB, Single-ended in and Balanced out: 19.2 dBBalanced in and Single-ended out: 13.2 dB, Single-ended in and Single-ended out: 13.2 dB Output impedance 25Ω, Max 150Ω @ 10Hz Input impedance 50kΩ, 20kΩ min Frequency Response +0 -1 dB 1Hz – 100kHz (20Hz – 100kHz +0 –1dB into 600Ω with 900pF 20’ interconnect cable) Maximum Output Voltage 100dB @ 1kHz (>80dB @ 20kHz) Power consuption 150W Dimensions W x D x H Control chassis – 17.5 x 17.5 x 4 inches (44.5 x 44.5 x 10.2 cm)Audio chassis – 17.5 x 17.5 x 6 inches (44.5 x 44.5 x 15.3 cm) Weight 90 lbs (40.82 Kg) Fully packed in two boxesUnpacked weight: Audio Unit – 38lbs (17.24Kg), Control Unit – 32lbs (14.50Kg)
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