Parasound Zdac v2

Zdac v2

http://www.parasound.com/zdac-v2.php

Analog volume control for RCA and XLR outputs
Separate volume control for the headphone Jacks
Digital audio connection to LightingTM jack-equipped Apple® devices (USB adapter required)
Updated headphone amp with increased gain
1/4″ and 1/8″ 24k gold plated headphone jacks
12V input and output triggers
Volume control lock out switch
Premium Analog Devices AD1853 24-bit/192 kHz Digital to Analog Converter IC
All inputs feature jitter reduction and are re-clocked and up-sampled to 422 kHz / 24 bit
USB input for playing music from PC or Mac (driver-less for easy setup)
Asynchronous sample rate conversion for all inputs including the USB input
Works with any format file on your computer up to 96 kHz / 24 bit
Optical and Coaxial digital inputs for use with any standard digital connection
RCA unbalanced and XLR balanced analog outputs
High current headphone output with volume control can drive any headphones from 32 to 600 ohms
Oversized internal toroid power transformer (not a wall wart like many competitors)
Will always power back up to the same input in the event of an AC power outage

NAD CD players

C538

https://nadelectronics.com/product/c-538-compact-disc-player/

C568

https://nadelectronics.com/product/c-568-compact-disc-player/

C546

https://nadelectronics.com/product/c-546bee-cd-player/

Features
CD, CD-R and CD-RW Compatible
USB Input supports external memory and audio rates up to 384kbps
MP3 and WMA decoding
NAD CD-9 Remote Control
Wolfson 24-bit Digital-to-Analogue Converter
Coaxial/Optical Digital Output
Low Output Impedance
Toroid Power supply with Separate Power Regulators for Analogue and Digital Sections
VFL Display with CD text
Selectable Track, Time and Repeat
Repeat Mode for Single Track or Entire CD
Program Play up to 20 Tracks
Random Play
External IR Input
12V Trigger Input
<0.5 watt Standby consumption
Detachable AC cord

Channel Islands VDA2 DAC


https://ciaudio.com/product/vda%E2%80%A22-24bit-digital-to-analog-converter/

Features
Traditional DAC designs use brick-wall digital filters, usually followed by more analog filtering to reduce sampling noise, but cause signal degradation in the process. Another approach has been to use no filtering at all, but this adds noise to the analog signal. Both of these designs have their strengths and weaknesses, but neither tends to be a good trade-off. This dac uses only a mild “slow roll-off” digital filter and first order analog filter to tame the sampling noise. This architecture has reduced filtering artifacts compared to brick-wall types, and lower sampling noise than filterless types, resulting in a more “analog” sound.

Digital input signals are accepted by Toslink optical or coaxial SPDIF, then fed to the CS8416 24 bit/192k low jitter input receiver, then to the Burr Brown PCM1794 balanced/current output DAC. Our unique output stage is a fully discrete/zero feedback design and uses only a single transistor per output to insure the purity of the audio signal. Circuit board is high quality 2 oz. copper with lead-free silver solder construction.

Input selection and digital domain phase are selected by convenient front panel switches, and an LED indicates “LOCK” when a valid signal is being received.

Specifications
Inputs
Toslink Optical, Coaxial SPDIF
Locking Frequencies
44.1k-192k (Coaxial), 44.1k-96k (Toslink)
Frequency Response
20Hz-20kHz +/- 0.1db
THD
<.03% 20Hz-20kHz
Output Level
2.25vRMS (Single-ended), 4.5vRMS (Balanced)