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The “ULTRAVOX” is a 50 Watt hybrid integrated power amplifier using the design principles of the Ultra range. This unit employ a single 6SN7 in the input stage, transformer coupled to two EL84 valves (tubes). The solid state output stage uses two pairs of massive FETs in Class A configuration. Two separate power transformers are used to supply the valve and FET stages.
Due to the unusual circuit topology, this design achieves the outstanding sonic qualities of the Ultra range while delivering 50 Watts (true rms) power to an 8-Ohm load.
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