Lowveld Audio
Accuphase Chario WBT Isotek

Accuphase :: A-70 STEREO Power amplifier 

 

Inheriting many outstanding technology features of the A-200, the A-70 represents a full model change from the A-65, ready to take its place as the ultimate pure class A stereo power amplifier. While reflecting this tradition, the A-70 also implements latest technology such as the ultra low-noise instrumentation amplifier principle realized in a discrete configuration, along with optimized signal input and power amplification stages, resulting in an astonishing 127 dB S/N ratio (at -12 dB gain), surpassing even the formidable earlier Accuphase stereo amplifier lineup.
The output stage of the A-70 features power MOS-FETs renowned for their excellent frequency response, sonic performance, and superior reliability. In the output circuitry, ultra-heavy-gauge edgewise coils with a surface area more than three times larger than conventional units, combined with MOS-FET switches are used in place of relays, to eliminate mechanical contacts and improve long-term reliability. Top-grade materials, sophisticated circuit pattern technology, and various other measures result in low impedance and enable the realization of a damping factor of 800, which represents a two-fold improvement over the A-65.

TECHNOLOGY

  • Pure Class A operation delivers quality power: 60 watts ×2 into 8 ohms
  • Power MOS-FET output stage features 10-parallel push-pull configuration per channel  
  • Input circuitry with MCS+ topology
  • Current feedback design combines superb sound with total operation stability
  • Bridged mode allows use as a monaural amplifier [480 W into 4 ohm]
  • Massive "Super Ring" toroidal transformer rated for 1 kVA
  • Dual-function power meters show digital readout or bar graph display

GUARANTEED SPECIFICATIONS

  • Continuous average output power: 60 watts/ch (into 8 ohms); 120 watts/ch (into 4 ohms); 240 watts/ch (into 2 ohms); 480 watts/ch (into 1 ohm) / Bridged operation: 240 watts (into 8 ohms); 480 watts (into 4 ohms); 960 watts (into 2 ohms)
  • Frequency response: 0,5 Hz - 160 kHz +0 -3,0 dB
  • Intermodulation distortion: 0,003%
  • Damping factor: 800
  • S/N ratio: 127 dB or better (A weighted)
  • Rated input: 0,87 V
  • Switched gain selector

MAIN FEATURES

  • Digital readout/bar graph power meters showing true output levels
  • Meter OFF switch/watt display range selector
  • Gain selector
  • Hold time selector
  • Mode selector
  • Input selector
  • Balanced inputs
  • Maximum dimensions: 465 (W) x 238 (H) x 515 (D) mm 
  • Mass: 43 kg net; 52 kg shipping