Parasound Zdac - DAC

A DAC and headphone amplifier built around a premium Analog Devices AD1853 24-bit/192kHz converter, with all inputs re-clocked and up-sampled to 422kHz/24-bit for jitter-free playback. Drives any headphone from 32 to 600 ohms while doubling as a high-quality preamp with both RCA and XLR outputs.

• Separate analog volume controls for line outputs and headphone jacks, with a lock-out switch
• 1/4" and 1/8" 24k gold-plated headphone jacks, driving headphones from 32–600 ohms
• USB input for driver-less playback from PC or Mac, up to 96kHz/24-bit
• Asynchronous sample rate conversion on all inputs, including USB
• Optical and coaxial digital inputs for standard digital sources
• Digital connection to Lightning-equipped Apple devices (USB adapter required)
• Oversized internal toroidal transformer — not a wall-wart power supply
• 12V input/output triggers; always powers back up to the same input after an outage

DAC
Analog Devices AD1853, 24-bit/192kHz

Sample Rate Converter
Analog Devices AD1895

USB Streaming Controller
Texas Instruments TAS1020B

Headphone Amplifier
Texas Instruments TPA6120

Supported Word Length
16–24 bit

Sampling Frequencies
Optical/Coax: up to 192kHz · USB: up to 96kHz

Upsampling
422kHz/24-bit on all inputs

Frequency Response
20Hz–20kHz (±0.2dB)

Channel Separation
>95dB (20Hz–20kHz)

Signal-to-Noise Ratio
110dB, A-weighted

THD+N
<0.015%

Max Output Level
Unbalanced: 2.4V variable / 2.2V fixed · Balanced: 4.8V variable / 4.4V fixed

Output Impedance
Line out: 160Ω · Headphone out: 10Ω

Power Requirement
110–130VAC 60Hz or 220–240VAC 50Hz; 10W operating, <1W standby

Dimensions
8.5" W × 10" D × 1.75"–2" H

Weight
5 lbs net (2.3 kg)