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

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)

Rotel DACs

RDD-1580

http://www.rotel.com/product/rdd-1580
Rotel’s new digital-to-analog converter envelops the listener in the most accurate audio reproduction possible from any digital source, whether it be legacy PCM sources or the latest digital file formats.

At its heart, the RDD-1580 makes use of Wolfson’s WM8740 stereo digital-to-analog converter. The RDD-1580 uses two WM8740s in a complementary configuration, which reduces noise and distortion well beyond that a single converter can provide.

Another RDD-1580 advantage lies in its input flexibility. A front panel USB input supports Apple iPod®, iPhone® and iPad® as well as streaming via Bluetooth with the included adapter. The rear panel PC-USB input supports audio up to 24-bit/192kHz in asynchronous mode. Two sets of rear panel RCA-style coaxial and optical digital inputs are optimized for LPCM data streams. This includes CDs 16-bit/44.1kHz standard up to high definition sources with 24-bit/192kHz audio data.

A Rotel-designed and manufactured toroidal transformer sits at the foundation of the RDD-1580’s well-regulated power supply. Advanced custom-designed slit-foil capacitors provide electrical storage capabilities to ensure substantial and stable operating voltages and current to feed the critical circuit stages.

The RDD-1580 provides both single-ended and balanced outputs with RCA and XLR connectors respectively. Recognizing today’s changing tastes in audio sources, the RDD-1580 even provides high-current charging capability (2.1 amperes) for an iPad® or similar device to reduce clutter and increase needed desk space while expanding your audio source options.

Built for stunning sound quality, but designed for today’s ever-increasing digital world, the RDD-1580 offers a first rate combination of superior sonics and convenience.
DIMENSIONS (W × H × D) 17″ × 2.13″ × 12.5″
POWER REQUIREMENTS 120V, 60Hz
POWER CONSUMPTION 25W
STANDBY POWER CONSUMPTION 0.5W
NET WEIGHT 5.1kg (11lbs.)
TOTAL HARMONIC DISTORTION (THD)(20Hz–20kHz) <0.004%
FREQUENCY RESPONSE 10Hz – 95kHz ±3dB
S/N RATIO (IHF “A” Weighted)128dB
DECODABLE FRONT USB
FORMATSMP3, WAV, WMA, Ogg Vorbis(up to 48kHz 16-bit)
COAX/OPTICAL DIGITAL INPUT SIGNALS LPCM (Up to 24-bit/192kHz)
PC-USBUSB Audio Class 1 (up to 24/96)
USB Audio Class 2 (up to 24/192)