Audio Engine D1 24-bit Digital-to-Analog Converter is perfect for anyone who wants to improve their home audio setup with high definition. Includes USB 2.0 cable Product highlights: high-performance DAC (digital-to-analog converter) for detailed, low-noise stereo sound built-in high-performance headphone amplifier (20 ohm to 300 ohm headphone impedance recommended) powered by USB connection — no need for external power supply when connected to a USB source (using optical input requires optional AC USB power adapter or connection to a computer's USB port) double regulated USB power ensures no USB bus power variations affect audio output compact design for portability 1 USB input for connection to a PC 1 optical digital (Toslink) audio input 1 pair of high-quality RCA audio outputs minijack (3.5mm) headphone output supported sample rates: USB: up to 96kHz optical digital: up to 192kHz input bit depth: up to 24-bits built-in driver for USB connection frequency response: 10 to 25kHz (±0.5 dB) THD: less than 0.0025% signal-to-noise ratio (DC to 20kHz): greater than 110 dB full scale output: 2V RMS 3-9/16W x 1-1/16H x 2-15/16D (5-1/4D including cable and volume knob)

One owner, very good cosmetic condition. Works as it should. Original power supply included and new rubber feet. Heres a review from stereophile https://www.stereophile.com/content/audio-alchemy-digital-decoding-engine-v10

Up for grabs is a Power Station Two and a Digital Decoding Engine v1.0. “DDE v1.0. The DDE works perfectly sans the I2s connection. Unsure if the i2s works or not as it is an oddball I2s with a 4 pin connector instead of the Audio Alchemy standard 5 pin I2s connection. As a result, no means with which to test the i2s. Included will be a cable to power the DDE from the PS2 and a power cord for the power station. The feet on the DDE are super sticky. I recommend post it notes on said feet to prevent marring of any surfaces. The cosmetics are average for both units given their vintage. Both units function well as described. Inputs are optical toslink and coax. The power station 2 can power a total of 3 Audio Alchemy units. Very nice indeed.

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Visual Reality Engine 1.0, 2 Dimensional Comb Filter, w/Power AdaptorUntested

Audio Alchemy Digital Decoder Engine V1.1 D/A Converter. Good physical condition. Feet disintegrated so I removed but there is gummy residue which can be removed with appropriate solvent. Not tested. Takes a 12v 150mA power supply which I do not have. I also have an Audio Alchemy Digital Transmission Interface listed for sale and can combine shipping if both items are purchased together. Not tested but I was told it works. I will pack well and ship quickly. Description: Single-box D/A provessor. Conversion: Bitstream, PDM—256x resampled. Data input sampling range: 40kHz–50kHz. Digital filter: 4x. Analog post filter: 3rd-order at 60kHz. Noise shaping: second-order. Inputs: coaxial on an RCA jack, optical on a Toslink jack. Outputs: RCA jacks, 2.75V output level at full scale. Three front-panel indicators: analog/digital power, incoming data lock. Frequency response: 20Hz–20kHz ±0.2dB. Resolution: 16 bits. THD+noise: –90dB. S/N ratio: greater than 93dB. Channel separation: 80dB (no frequency specified). Linearity: ±1dB at –90dB, ±2dB at –100dB. De-emphasis error: ±0.25dB.Dimensions: 8.5 W by 1.75 H (front panel), 7.4 W by 1.75 H by 5.75 D (chassis including jacks). Shipping weight: 5 lbs.

Audio Alchemy Digital Decoding Engine V3.0 + XDP Power Station + RW-1 RemoteMultibit sound quality - AD1862N DAC chips From my personal equipment collection. This DAC has been in my headphone rig for several months getting regular use. The XDP Power Station has the same specifications as the Power Station 4 and works fine. The DDE V3.0 has the optional specially programmed Intel 87C51 micro-controller installed. This allows remote volume control, input selection, channel balance and muting of the DAC via the RW-1 remote. The remote is not necessary to use the DAC.I am selling due to downsizing my audio equipment collection. I have another DDE 3.0 that I am now using that works fine, but does not have the optional Intel chip like the one that is listed for sale here. That is why the remote is being sold in this listing. A printed copy of the operating instructions for the DDE 3.0 and RW-1 will be included. As information, I prefer the DDE 3.0 with the XDP or PS4 power supplies versus the PS2 or PS3 units, as I find the PS2 and PS3 units to be mechanically noisy due to transformer hum.I have tested all 3 digital inputs (optical, coaxial, and I2S) and all work fine. The I2S input must be connected to a DTI device that has an I2S output. I have a DTI unit (not for sale) that the I2S connection has been tested with. I also have played HDCD discs through the DAC and the HDCD light comes on. I am including a BNC to RCA adapter to allow using a standard RCA digital coax cable. I have the internal gain control set at position 1 for an output of 1.14 V RMS. There are 3 other settings that can be used by changing the shorting plugs to different jumper positions. The RW-1 remote works fine in all listed functions, as noted above. There is a small micro switch on the side of the remote that allows it to function with the DDE V3.0. Set the slide switch (on the right side of the RW-1) to position 3; all the way back, towards the battery end of the remote. The RW-1 also will control the DLC preamp, which I used to own. Will be double boxed for shipping. If you have not owned Audio Alchemy gear before, I will point out that the instructions recommend doing all cable connections to the DAC before connecting the power cable. I have followed this method with all the various Audio Alchemy gear I have owned with no issues. This DAC was one of Stereophiles Joint Budget Components of 1996.

UNTESTED BUT APPEARS TO POWER UP PROPERLY. I am home audio illiterate, so bid accordingly. I acquired this in a home sale. All offers will be considered Sold as is. No returns