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Reference Amplifier Model 285

  • Frequency response: 20HZ to 20KHz +- 1 dB @ full rated power.

  • Continuous rated power: 85WPC both channels driven, 1KHz less than 0.5 % THD+N.

  • Continuous power before clipping: 105WPC. Both channels driven 20Hz to 20Khz minus 3 db.

  • Signal to noise ratio greater than 100.

  • Four matched KT-120 power tubes

  • One 12AX7, two 12AT7 and 2 6AL5 (DC Restorer) tubes.

  • Five-year warranty includes the vacuum tubes!

  • Rhodium plated Viborg Binding post and gold RCA inputs

  • Dual purpose output
    and Bias Adjustment meter

  • Optimized Canadian made output transformers. Interleaved windings, wide bandwidth

  • CAD designed and CNC machined 6061 aluminum chassis.

  • Black and copper anodized finish.

  • DC Restorer - prevents bias sag under dynamic loads. 

  • Special separate voltage and current feedback design provides back EMF 'listening to the room' consistency of soundstage scale in less than perfect room conditions.

  • Selectable feedback for 8 and 4 ohm load.

  • Buffered RCA full range preamp  level subwoofer output jacks on rear panel.


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The Reference Amplifier Model RAM 285 is the latest and most advanced legacy design from world famous audio designer and physicist Bob Carver. The RAM 285 provides the timeless sound of vacuum tubes without the vintage heat or compromises. The RAM 285 is designed and built to out perform comparable products at the highest prices. We believe it's the best in its class and welcome you to hear it in your system at home. The RAM 285 has Bobs latest DC Restorer circuit, a type of dynamic bias supply, using fast acting vacuum tubes for an unbeatable response. Normally tube amplifiers would experience DC bias sag under highly dynamic loads. The DC Restorer prevents bias sag delivering a dynamic and robust performance as intended, while allowing lower idle current, lower heat and extending tube life to decades. Highest Fidelity - Bob increased the high voltage (785V B+ compared to 400-500 in most tube amps) combined with a new high current heavy design.  The latest DC Restorer uses fast reacting 6AL5 vacuum tube, offering the longest tube life and minimal maintinace cost. Audio output transformers are 15% oversize at full power, while exceeding full audio bandwidth. High end, high temp, aerospace grade, computer designed and tested, heavy copper, multi-layer circuit board with internal copper ground planes for lower noise than point to point wiring.  CNC machined aluminum chassis construction.  Black and copper anodized finish. Low noise 1% Dale CMF-55 resistors are used throughout for highest precision and the lowest noise floor. WIMA capacitors. Custom 800v MKP film capacitors. Each unit comes with a serialized copy of the inspection report. Fully analog discrete design, using all thru hole components and no chips. Designed for a lifetime of enjoyment.

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