onrad-Johnson has marked its 40th anniversary with two new amplifiers, both of which use KT150 output tubes, the first time these tubes have been used by the company.
A single pair of KT150s produces 150 watts per channel from the ART150 stereo amplifier ($18,500), while two pairs of the tubes produce 300 watts from each ART300 monoblock ($36,000/pair). In addition to utilizing the KT150 output tubes, the ART150 and ART300 have new input and inverter stages that use 6922s for voltage gain. The amps' main power-supply reservoirs have a more than tenfold increase in total capacitance compared to Conrad-Johnson's earlier ART and ARTSA amplifiers. The 40th-anniversary amps also feature a new regulator circuit for the input-stage power supply.
New styling puts the output tubes behind a clear window spanning the full width of a protective tube cage, while the input tubes are encased in a clear protective block.
© The Audio Beat Nothing on this site may be reprinted or reused without permission.