Most of these models are out of production.
They are typical for the period up to 2010 when USB audio was in its infancy.
The information below is as supplied by the manufacturer's website.
USB: 32kHz, 44.1kHz, 48kHz
Vintage Computer Audio: SilverStone EB01B - Michael Lavorgna
Inputs: USB/COAX/TOSLINK SPDIF: 24bit/96kHz
USB: 16/48
Seperate re-clocking circuits for USB and SPDIF
Output: line, class A head- and pre-amp.
A decade later it was reviewed at ASR
Texas Instruments PCM1744
USB: 16 bits/48 kHz
MusicStreamer+ $249.95
TI DAC PCM1794
USB: 16 bits/48 kHz
192 kHz Upsampling DAC / Headphone Amp with USB and S/PDIF inputs.
USB: 16-bit / 32, 44.1, 48 kHz
DAC: non-oversampling (NOS). Audio playback occurs at the recorded frequency (), with no resampling, upsampling, or oversampling.
Output: RCA
32 bit Texas Instruments Digital Signal Processor (DSP)
DAC: Twin Wolfson WM8740
Digital input:
2x S/PDIF (coax & Toslink)USB input connects direct to PC without drivers
Digital input word widths supported: | 16 -24bit (16 bit for USB) |
Digital input sampling frequencies supported: | 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz. |
USB input | 16 bits / 44.1,48kHz |
Audio output up-sampling: | Fixed 24bit/192kHz |
Output
Analog: RCA/XLR
Digital: 1x S/PDIF (coax & /Toslink)
How the adaptive mode USB of this DAC performs compared with asynchronous USB can be found here.
Digital input
Sampling rate: 44kHz – 96kHz
Analog output: RCA
Digital input
DAC
Analog output:
Class A discrete FET based output stage
Balanced (XLR) and unbalanced (RCA)
Upsampling: 24 bit/192 kHz
Fully balanced design
Digital input:
Dual Mono DAC (2 x Burr Brown PCM1796)
USB-Codec: Texas-Instruments PCM2906 Transceiver
Analog output:
Single ended Class A amplifiers
balanced (XLR) and unbalanced (RCA)
Digital output: COAX, TOS, AES/EBU-Input are routed to the USB-output (up to 48kHz/16bit).
Digital input: USB, Optical, Coaxial, AES/EBU(XLR)
Analog output: balanced (XLR) and unbalanced (RCA)
32, 44.1, 48, 88.2, 96, 176, 192K sampling
Digital input:
USB (1), COAX (2), OPTICAL (2),AES-EBU (1) BNC (2)
Sample rates: 16-24Bit PCM, 16Bit 32K-48K USB
Analog output: balanced (XLR) and unbalanced (RCA)
Digital input (5): AES/EBU (XLR), S/PDIF (BNC, RCA, TosLink), USB.
Sample rates: 32–96kHz (S/PDIF, AES/EBU), 32kHz–48kHz (USB).
Analog output: RCA (1 pair), balanced XLR (1 pair).
Digital input: Asynchronous USB
No oversampling and no analog or digital filter
16bit @ 44.1kHz WAV/ FLAC only
Analog output: RCA (1 pair)
Digital input:
2 x SP/DIF BNC Coax
2 x AES Balanced XLR Input
2 x Plastic fibre optic ( TOSlink )
1 x USB ( B type )
1 x Bluetooth supporting A2DP Stereo Audio
Sample frequencies 32kHz – 96kHz Single Cable,
176kHz & 192kHz Dual Cable ( Dual data mode )
Random master clock jitter of less than 3pS cycle to cycle
Analog output: 2 X RCA /
2 X balanced (XLR)