The Well-Tempered Computer, an introduction to computer audio

Sunday, February 13, 2011

Grant Fidelity Tube DAC-09


Hong Kong made Grant Fidelity Tube DAC-09 is a tube-output stage USB DAC with headphone amp.  Seems like a lot to offer for merely US$215.  Tweakers can tube roll the unit, several discussions on DAC-09 tube rolling here:



Features: 
  • 2 x analog RCA input 
  • 1 x coaxial, 1 x Toslink and 1 x USB 2.0. 
  • 2 x RCA Outputs tailored to your taste - one with transistor and one with single 6N3 (5670) vacuum tube.
  • Built-in headphone amp to allow you enjoy music in privacy (standard 6.5mm jack). Transistor output.
  • Separate power supply rectification to analog and digital circuits
  • Gold coated signal connectors throughout
  • Supports up to 24 bit and 96kHz
  • High quality processing chips used throughout  - Cirrus Logic for main D/A converter and National Semiconductor LF353N for op-amp 
Specifications: 
  • Input impedance: Analog - 100kohm; Digital - 75 kohm
  • THD: Transistor output <= 0.001%; Tube output <= 0.1%
  • Frequency Response: 20Hz to 30kHz +/-1 dB
  • Max Output: 1000mWx 2 (32 ohm); 500mWx2 (300 ohm); 300mWx2 (600 ohm)
  • S/N ratio: Transistor - 96dB; Tube - 90dB
  • Output Voltage: 2000mV
  • Dynamic Range: 117 dB
  • Power supply: 115/230V, 60/50Hz selectable
  • Size: 26cm Width x 17cm Depth x 5.5cm Height
  • Net weight: 2kg (detachable standard IEC power cord included)
  • Color: silver or black face plate
  • $215 direct fro Hong Kong