This is the ifi pro iDSD DAC/Streamer/Headphone Amplifier along with a separate linear power supply. It comes with a small remote. The linear power supply does not have its own power cord so you will have to supply that. I am the second owner. I have changed the tube to an upgraded tube that really improved the sound. I will send some extras with it. The manual is online and easily accessible.
The unit was recently completely cleaned and works excellently. It was sold to me in claimed mint condition and I have used it and enjoyed it since April of 2022 until recently. I have never used the streaming part of this but I've used the headphone amp and the DAC for my main system and they are excellent. I have moved up the ladder in DAC world so I no longer need this item.
I linked the Stereophile article which has the best descriptions and I quote from it below:
"The Pro iDSD is built around four of Burr-Brown's hybrid MultiBit/DSD DAC chips and a Crysopeia FPGA Digital Engine that allows PCM up to 32-bit/768kHz, DSD up to 49.152MHz, and DXD and double-speed DXD. The Pro iDSD's digital inputs are: USB (required for DSD, DXD, and sample rates above 192kHz), AES3 (XLR, single link), S/PDIF (coaxial/optical combo), and multifunction BNC (S/PDIF in or sync input). All inputs, including USB, are galvanically isolated. The USB input is self-powered and does not draw power from the USB bus. In addition to its own internal clock, the Pro iDSD can accept an external word-clock signal.
The playback options include: Airplay network audio playback from iPhone and iPad, and Mac computers; DLNA network audio playback from smartphones, tablets, and computers running Windows or Linux; playback from a hard-disk drive (HDD), USB memory, or SDHC memory card; playback from Network Attached Storage (NAS); streaming playback from Napster, Qobuz, QQ Music, Spotify, Tidal, and others; and MQA.
The little Pro iDSD measures 8.7" W by 2.5" H by 8.4" D and weighs 4.4 lb. On its rear panel are balanced (XLR) and single-ended (RCA) analog output jacks, as well as a four-position screwdriver-slot rotary switch that offers a choice between fixed and variable outputs, and between output levels appropriate for professional- and domestic-audio settings. The XLR jacks output 11.2V when set to Pro mode and 4.6V when set to HiFi mode, while the RCA jacks offer 5.6V in Pro and 2.3V in HiFi. In variable mode, those numbers describe the maximum output available when the Pro iDSD's front-panel volume knob is turned fully clockwise.
* * *
To the right of the input selector is a little knob that selects among three forms of digital processing:
1) Direct—Bit-Perfect: Neither PCM nor DSD signals are processed in any way (non-oversampling for PCM, direct-to-analog conversion for DSD files).
2) PCM Upsampling: PCM is upconverted to 16x PCM (705.6/768kHz) using one of the following filters:
a) Bit-Perfect: no digital filtering applied; 44.1–192kHz always used for 352.8–768kHz.
b) Bit-Perfect+: no digital filtering applied, sinc rolloff corrected.
c) Gibbs Transient Optimized: 44.1–96kHz.
d) Apodizing: 44.1–384kHz.
e) Transient Aligned: 44.1–384kHz.
3) DSD–Remastering: Incoming audio (except DSD512) is converted to either DSD512 or DSD1024, as selected, using the filter selected. Inputs other than USB are limited to maximum sample rates of 192kHz PCM and DSD64 via DoP. A fixed third-order analog filter operates at 80kHz with correction for DSD's 6dB attentuation.
Below that little knob is a tiny three-way switch with a series of charming symbols representing the Pro iDSD's three options of output circuit:
1) Solid-State: pure class-A J-FET topology
2) Tube: a totally separate, pure class-A circuit based on two GE5670 tubes
3) Tube+: reduces the tube circuit's negative feedback to a minimum
You can read the rest but Stereophile concluded:
To my mind, analog audio still produces a more authentic and believable sense of force and corporeality, so I naturally prefer digital audio gear whose sound comes closest to those qualities. In previous reviews I've praised the HoloAudio Spring "Kitsuné Tuned Edition" Level 3 and Mytek's Manhattan II for precisely those traits. I can now add the Pro iDSD to this short list of DACs that recover an enjoyable illusion of dense bodies playing music."
Another review here:
https://www.head-fi.org/showcase/ifi-audio-pro-idsd-standalone-streamer-dacamp.23234/reviewsSee the ad at US AudioMart which has photos:
https://www.usaudiomart.com/details/650177164-ifi-pro-idsd-dacheadphone-amplifier-and-power-supply-unit/I am asking $1,275 which includes both the ifi and the power supply. The power supply costs about $175 or so new. Shipping is extra. Please pay via PayPal F&F or Zelle. My feedback on US AudioMart and Ebay is spotless both as a buyer and seller. I've also made some transactions on AudioCircle. I will consider reasonable counters but not lowball bids. The units will be properly and safely shipped to the buyer in CONUS.
Happy to answer any questions.
As for trade possibilities: I'd be interested in some bookshelf speakers or streamer/music server equip.
