Bryston BUC-1 USB Converter

Bryston BUC-1 USB Converter $750

• Native 24 bit resolution at sampling rates of up to 192 kHz
• Asynchronous USB receiver
• Controls master timing of the audio system
• Outputs transformer coupled
• Input sample rate indicators
• Ultra low noise linear power regulation

Dimensions

• 2.25” H x 5.63” W x 8” D
• 57.15mm H x 142.88mm W x 203.2mm D

Gefen USB DAC and converter

24 bit / 192 kHz USB DAC with RCA and headphone out.

Can also be used as a USB to Toslink convertor.

Driver for Windows.

• Audio Input Connector: (1) USB Mini-B
• Audio Output Connectors:
  • (1) TOSLINK (optical)
  • (1) L/R analog audio (2 x RCA female)
  • (1) 1/4-inch stereo headphone jack
• Power/Streaming indicator: (1) LED, blue
• Sampling Frequency indicators: (6) LEDs, blue
• Signal-to-Noise Ratio: 110 dBA
• Frequency Response: 10Hz - 20kHz ± 0.1 dB
• Total Harmonic Distortion (THD)+N: <0 .02="" li="">
• Operating Temperature: +32 to 104 °F ( 0 to +40 °C )
• Operating Humidity: 20 to 90% RH, no condensation
• Storage Temperature: -4 to +140 °F ( -20 to +60 °C )
• Storage Humidity: 0 to 95% RH, no condensation
• Power Consumption: 2.5W (max.)
• Dimensions (W x H x D): 3.4" x 1.3" x 3.4" (86mm x 34mm x 86mm)
• Shipping Weight: 1 lbs (0.45) kg

Website Gefen

Price: $129.00

Sonore Rendu

Ethernet to S/PDIF converter.




This is a DLNA/UPnP 2.0 compliant renderer.
It doesn’t have an interface but as it is a DMR (Digital Media Renderer in DLNA speak), you can control the volume using a DMC (Digital Media Controller).
A DMC can be a PC running a DLNA server/controller software like JRiver or a smartphone with DLNA software.
The schema explains it nicely.


One of the disadvantages of DLNA is the lack of gapless playback.
The Rendu supports it but the controller must support it too.
At the present the Rendu support gapless in combination with Bubble UPNP as controller on Android or JRiver on a PC.

The Sonore Rendu.i2s has Ethernet input and SPDIF/I2S over HDMI out.
A model including a ESS Sabre ES9023 DAC is planned.
At the present only 120 VAC models are available!


Features

• supports gapless playback*
• supports DSD/DoP pass thru**
• powered by an on board, extremely low noise, low output impedance linear power supply
• isolated from noise on the network
• operates fully asynchronously, using on board fixed frequency low jitter clocks
• features a transformer coupled true 75 ohm SPDIF BNC output
• has an integrated, 32 bit, high precision volume control
• supports up to 24 bit playback at the following sample rates: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz
• plays AAC, AIFF, ALAC, FLAC, MP3, and WAV files from HTTP streams
• controlled via apps on your mobile device
• UPnPTM AV 2.0 / DLNA compliant
  * Gapless is currently supported via Android with Bubble UPNP as controller, J-River on PC as controller with local storage. Check back for updates.
  ** DSD/DoP pass thru requires the use of MinimServer

Website: Sonore
Price US$ 1369

Bel Canto REFLink

Asynchronous USB converter

Supported sampling rates: 44.1kHz - 192kHz
Supported word lengths: up to 24-bit
USB driver for Win

Output:

• Coaxial SPDIF on BNC 75Ω 
• Balanced AES on XLR 110Ω 
• LightLink ST Fiber 

Proprietary 500MHz DSP Asynchronous USB Core
Dual Ultra-Low Phase-Noise Clocks
Two-stage galvanic isolation
Dedicated LNS (Low Noise Supply)

Website: Bel Canto 
Price: AU$ 1595

CIAudio Transient MKII Asynchronous USB Converter

Input: asynchronous 24/192 USB (Xmos), driver for Windows

Digital Outputs:
• S/PDIF via 75 ohm BNC Connector (Galvanic Isolated)
• I2S via Mini DIN Connector (Audio Alchemy/Perpetual Tech/Camelot)
• Differential I2S via HDMI Connector (PS Audio/Wyred4Sound)

Sample Rates Supported: 44.1k, 48k, 88.2k, 96k, 176.4k, 192k up to 24bits

Master Clock Jitter: < 1.0 psec

Analog Output Level: 2V RMS Maximum (Single-ended RCA)

Frequency Response: 0hz to 96kHz

THD + Noise: -89db @ -1dBFS

Dimensions: 4.45"W x 2.9"H (including feet) x 5.25" D

Warranty: 5 Year Parts & Labor

Website: CIAudio 

Price: US$ 699

M2Tech hiFace Two USB to SPDIF converter

The biggest news is probably that M2Tech decided not to use their proprietary drivers but to using the native mode USB audio drives of the operating system.
It is UAC1 and UAC2 compliant so will work out of the box with Win, OSX and Linux.
For > 96 kHz you need a driver on Win as Win is not UAC2 compliant.
The receiver is by XMOS and the driver by Thesycon.

• Input 1 x USB A type male
• Output 1 x RCA or BNC female
• Input USB 2.0 Audio Format with aAsynchronous synchronazation 
• Output S/PDIF Stereo Digital Audio Format
• Sampling Frequency: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4khZ, 192kHz
• Resolution 16 up to 24 bit
• Dimensions 10.2(d) x 2.2(h) x 2(w) cm
• Power Supply 5V DC from USB bus
• Weight 50gr approx.

M2Tech hiFace 2 
Price: US$ 185

John Kenny JKSPDIF MK3

Modified HiFace 24/192 asynchronous USB - SPDIF converter
Manufacturers description:

• it is completely off-grid, powered from 2 internal batteries (these will last about 24 hours between charges)
• it is portable - no need for external power supply when listening to audio
• the SPDIF output stage is now based on the Wolfson WM8804 chip
• SPDIF signal is now within spec
• it comes in an aluminium enclosure
• it now uses a USB type B socket
• internal battery charger - requires user supplied 9V or 12V DC supply

Website: John Kenny

Price: €320

Human Audio Tabla Pico

USB to SPDIF converter using Hiface EVO drivers (bulk mode).

Manufacturers description:

• Resolution: up to 24 bit / 192 kHz
• OS driver availability: for Windows & Mac OS X ( hiFace EVO compatibility )
• Input: USB 2.0
• Output: 75Ω BNC (optional RCA adapter from BNC)
• Powering: Built-in rechargeable LiFePO4 battery with ~8 years lifetime without memory-effect
• Charging: Fully automated from USB power when idle(stop & power off state)
• Operation time (in "GREEN" battery mode) without charging: at least 12 hours of continuous playback
• Seamless switching (with LED indication) between the clear battery ("GREEN") mode and battery charging during playback ("YELLOW") mode without any audible glitch. The battery is permanently connected to the circuit, only the charge control switch goes on and off when required. 
• Charging time: max. 8 hours

Website  Human Audio
Price: US $579 / €380 (including 27% VAT)
The Pico on Head-Fi

Anedio U2

Asynchronous USB to SPDIF converter.

USB class 2 compliant (24/192)
USB receiver by XMOS, Win driver by Thesycon.
Two independent low-jitter crystal oscillators.
Galvanically isolating using a high-speed transformer at the SPDIF output.
BNC connector.

 Price: US$390
Website

Musical Fidelity Vlink192

24 bit/ 192 kHz asynchronous USB converter

It has both coax and fully balanced digital outputs.
Both are fully galvanically isolated.
USB receiver by XMOS

Price: $399
Website

Soulution 590 USB converter

Asynchronous USB converter.
24/192 USB class audio 2.
Driver for Win

Digital outputs:
- 1 x SPDIF (RCA)
- 1 x AES/EBU (XLR)
- 1 x Optical (Toslink)

Website
Price: CHF 3.000

M2Tech hiFace Evo

Asynchronous USB converter used in conjunction with proprietary drivers which allow for Kernel Streaming, Direct Sound and WASAPI operation.

Sampling frequencies (kHz): 44.1, 48, 88.2, 96, 176.4, 192
Resolution (bits): 16 to 32
Inputs: USB 2.0, supply, master clock
Outputs:
S/PDIF x2 (RCA & BNC)
AES/EBU (XLR)
optical Toslink™
optical ST
I2S (RJ-45)

Price: $499.00