Woo Audio WA7 Fireflies $999

Pure tube Class-A headphone amplifier with 24-Bit, 384K USB Digital-to-Analog Converter

• C-Media 6631 USB chip
• TI PCM5102A 32-bit DAC chip
• Distortion: <0.03%
• S/N: 95dB

Measurements on Audio Science Review

Wyred 4 Sound - DAC2 $1,499.00

• ESS Reference audio (ES9018) 32 bit DAC
• Automatic oversampling for precise output filtering
• Fully balanced design with balanced and unbalanced outputs
• Upgradable Digital, Output, and USB boards (designed for future improvements)
• VFD display for input, sample rate, volume control, and configuration viewing
• Remote control
• Defeatable - 32 bit volume control
• 2x Coax inputs
• 2x Toslink inputs
• 1x AES/EBU input
• 1x Balanced I2S input via HDMI cable (not standard HDMI cable format)
• 24-bit 192kHz Asynchronous USB input
• Proprietary drivers for 32/64 bit Windows XP, Vista, 7 and Mac OS 10.4, 10.5 ,10.6