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Little Dot DAC_II DAC / Headphone Amplifier

Posted: Jan 10th, '10, 08:17
by sword_yang
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The Little Dot DAC_II combines our Little Dot DAC_I's D/A circuit with a built-in (LME49710HA pre-stage and discrete BD139/BD140 transistor output stage) headphone amplifier module! Four inputs (Coaxial, BNC, Optical, and USB) allows the Little Dot DAC_II to be used with digital source like a CD Transport or a computer as a standard USB audio device. User functionality customizations include setting the bit-rate, maximum sampling frequency, and how the DAC's digital filter operate (sharp or gentle). At the heart of the Little Dot DAC_II are the Wolfson Micro's high quality 24-bit 192Khz WM8740 DAC chip, WM8805 ultra-low jitter (50ps) digital transceiver chip, and the ultra-low distortion LM4562/LME49720/LME4910. A dual crystallizer re-clock circuit ensures a synchronized and jitter-free signal!

The internal components have been carefully chosen for their quality and precision - tight tolerance resistors, WIMA coupling caps, ELNA and NISSEI filter caps, Toshiba optical connectors, and BD139/BD140 transistors.

Precise with flat frequency response, the Little Dot DAC_II delivers a smooth and highly accurate sonic presentation with no detail left obscured!


Technical Specifications:
  • S/PDIF Digital Inputs:
  • BNC
  • RCA (Coaxial)
  • Toslink (Optical)
  • USB (Standard USB audio device)
  • Output Frequencies:
  • 16/24-bit
  • 44.1 KHz - 96 KHz (Display will show 44.1 KHz, 96 KHz, or 192 KHz)
  • USB input: 16-bit / 48 KHz
  • Output Voltage:
  • RCA non-balanced output: 2V (RMS) per channel
  • Headphone output: 300 mW RMS (32 ohms)
  • Signal-To-Noise: > 110 dB
  • Dynamic Range: 117 dB
  • Total Harmonic Distortion: -104 dB
  • Power Consumption: 10 VA
  • Fuse Rating: 1A
  • Measurements:
  • Metric: 365mm (length) by 217mm (width) by 61mm (height)
  • English: 14.37 inches (length) by 8.54 inches (width) by 2.4 inches (height)
  • Weight:
  • Gross: 2.8 KG
  • Net: 2.0 KG

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Little Dot DAC_II Reference Guides

Posted: Jan 12th, '10, 08:43
by sword_yang
Space reserved for Reference Guide download links