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Taking as a starting point the circuits used in the 834 integrated amplifier, Tim de Paravicini has addressed that need by producing the 890 power amplifier. Using the innovative KT90 valve from EI, he has been able to offer 70W of clean Class-A audio from the same chassis as the 834. One of the few new valve designs of the last 30 years, the KT90 draws on the strengths of the EL509 valve (as used in many EAR amplifiers) and is capable of sustained high power operation with great reliability. Two pairs per channel are hardly stressed in the EAR 890.
Description: Stereo tubed power amplifier with inout level controls. Tube complement: two 6AQ8, two 12AX7, eight KT90. Output power: 70Wpc into 8 (18.45dBW) or 16 ohms (21.45dBW). Power bandwidth: 15Hz-40kHz at 3.0% THD. Input impedance (measured at 1kHz): 55k ohms, unbalanced or balanced. Input sensitivity: 1.0V. Signal/Noise Ratio: 92dB (no ref. level specified).
Dimensions: 16" W by 7" H by 16" D. Weight: 60 lbs.