The Symphonic offers an almost infinite number of inputimpedance and gain options as well as balanced and unbalanced input option tothe cartridge, all externally selectable, with selections signified internallywith illuminating LEDs. Also incorporated in the design, is a new low frequencyRumble filter. This device uniquely filters out rumble signals appearing onboth channels. The Symphonic has been designed for Moving Coil cartridges only.     The Symphonic Phonostage conforms to the RIAA curve without the IEC roll-off when the Rumblefilter is set to off. This is commensurate with the high calibre of Chordamplification. The IEC curve response can be added by setting the Rumble filterto on.     According to thewiring of the tone arm on the record deck used, the Symphonic can be operatedin either an unbalanced or balanced mode. All domestic equipment is designed toenable unbalanced operation. Better results will be achieved in balancedoperation when used in a complete Chord system.   - Moving Coil 40dBv to 80dBv fully selectable inputimpedance from 25ohm to 47Kohm - Input impedance options externally selectable withinternal verification        TechnicalSpecifications Unbalanced 4R7 33R 100R 4k7 47k 150pf   all with 47pf or 200pf Balanced 9R4 66R 200R 9k4 94k 75pf   all with 47pf or 100pf Input Noise 1.5nV/Hz (approximate - absolute still air) Max. V rms 10V - all frequencies undistorted Gain range 0dB - 60dB, 40dB @ 1 KHz Response R1AA curve Accuracy 0.1dB ]]>

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