Promitheus DAC
markmarc
Posts: 2,309
After 2 years of wonderful music, I'm selling my minty Promitheus DAC for $300 (+ shipping), including the $150 power cord. Right now this combo w/shipping from Promitheus costs $720.
The DAC is a non-upsampling unit, and it's greatest build virtue is that every part of the design is focused on eliminating noise. The case is made of Merbau wood, which looks very similar to mahogany.
Please PM me with any questions. Payment by Paypal only. Shipping from 97123. I'll have box measurements and weight this evening.
You can read my full review at: www.affordableaudio.org/PromitheusDac.pdf
Below are the specs:
The main board for the DAC.
Our Non-oversampling DAC using the TDA1545A chip with Asynchronous Relocking, Passive I/V stage. Output transformer coupled
Features
• Our own silver pulse transformer (this separates the ground thus resulting in a quieter music) to couple the digital output of your cdp into our DAC. Our nickel core transformer is wound on a 2mils lamination (0.05mm).
• Therefore the digital ground is broken up between the DAC and the Transport/CDP to allow a cleaner presentation as the grounds are isolated
• Dedicated pre and post regulator (for each chip) to bring down the noise floor
• Specially wound Balanced power transformer to power DAC, this is the same winding topology as our balanced power supply. This further brings down the noise floor. The power transformer is wound on a M6 core
• Dedicated windings on the power transformer for the digital power supply and the analog power supply. This is NOT shared to prevent the transfer of digital noise to your precious analog power supply.
• The power transformer is fitted with MULTIPLE electrostatic shields to prevent the spreading of the noise cause by digital circuits. This electrostatic shields shunt noise to ground thus keeping the power supply clean
• Asynchrous reclocking to 100Mhz. Clock module is place below the PCB to prevent spraying the board with noise. The clock module is located at the bottom left end of the PCB. The clock has its own dedicate power supply to decouple the noise generated from the clock
• The DAC is design around a good power supply system
IN the digital segment there is a master regulator and then its is fed into local regulators individually finding the IC. SO each digital IC is totally isolated from another digital IC
The Opamp segment is run again with its own local discrete regulator. This keeps the noise isolated between left and right op-amps
• Selectable gain structure of 1.25volts out, 2.2volts out and 4 volts output. This allows user to optimize their gain structure. This can be change by the user by opening the unit and selecting the right jumper on the board
• On the output, output transformers is used to couple the analog voltage from the DAC to the outside world. This way the DAC is impedance match to your down line equipment. This output transformer is wound on a M6 core
• Chassis for the DAC is built on our tune wooden Merbau wood with Stainless Steel plate similar to our TVC construction
• Our new Neotech 7N copper for internal wiring Teflon wires for power
• Pure Silver RCA used for digital input and analog output
• USB input and Coaxial Input
The DAC is a non-upsampling unit, and it's greatest build virtue is that every part of the design is focused on eliminating noise. The case is made of Merbau wood, which looks very similar to mahogany.
Please PM me with any questions. Payment by Paypal only. Shipping from 97123. I'll have box measurements and weight this evening.
You can read my full review at: www.affordableaudio.org/PromitheusDac.pdf
Below are the specs:
The main board for the DAC.
Our Non-oversampling DAC using the TDA1545A chip with Asynchronous Relocking, Passive I/V stage. Output transformer coupled
Features
• Our own silver pulse transformer (this separates the ground thus resulting in a quieter music) to couple the digital output of your cdp into our DAC. Our nickel core transformer is wound on a 2mils lamination (0.05mm).
• Therefore the digital ground is broken up between the DAC and the Transport/CDP to allow a cleaner presentation as the grounds are isolated
• Dedicated pre and post regulator (for each chip) to bring down the noise floor
• Specially wound Balanced power transformer to power DAC, this is the same winding topology as our balanced power supply. This further brings down the noise floor. The power transformer is wound on a M6 core
• Dedicated windings on the power transformer for the digital power supply and the analog power supply. This is NOT shared to prevent the transfer of digital noise to your precious analog power supply.
• The power transformer is fitted with MULTIPLE electrostatic shields to prevent the spreading of the noise cause by digital circuits. This electrostatic shields shunt noise to ground thus keeping the power supply clean
• Asynchrous reclocking to 100Mhz. Clock module is place below the PCB to prevent spraying the board with noise. The clock module is located at the bottom left end of the PCB. The clock has its own dedicate power supply to decouple the noise generated from the clock
• The DAC is design around a good power supply system
IN the digital segment there is a master regulator and then its is fed into local regulators individually finding the IC. SO each digital IC is totally isolated from another digital IC
The Opamp segment is run again with its own local discrete regulator. This keeps the noise isolated between left and right op-amps
• Selectable gain structure of 1.25volts out, 2.2volts out and 4 volts output. This allows user to optimize their gain structure. This can be change by the user by opening the unit and selecting the right jumper on the board
• On the output, output transformers is used to couple the analog voltage from the DAC to the outside world. This way the DAC is impedance match to your down line equipment. This output transformer is wound on a M6 core
• Chassis for the DAC is built on our tune wooden Merbau wood with Stainless Steel plate similar to our TVC construction
• Our new Neotech 7N copper for internal wiring Teflon wires for power
• Pure Silver RCA used for digital input and analog output
• USB input and Coaxial Input
Review Site_ (((AudioPursuit)))
Founder/Publisher Affordable$$Audio 2006-13.
Former Staff Member TONEAudio
2 Ch. System
Amplifiers: Parasound Halo P6 pre, Vista Audio i34, Peachtree amp500, Adcom GFP-565 GFA-535ii, 545ii, 555ii
Digital: SimAudio HAD230 DAC, iMac 20in/Amarra,
Speakers: Paradigm Performa F75, Magnepan .7, Totem Model 1's, ACI Emerald XL, Celestion Si Stands. Totem Dreamcatcher sub
Analog: Technics SL-J2 w/Pickering 3000D, SimAudio LP5.3 phono pre
Cable/Wires: Cardas, AudioArt, Shunyata Venom 3
Founder/Publisher Affordable$$Audio 2006-13.
Former Staff Member TONEAudio
2 Ch. System
Amplifiers: Parasound Halo P6 pre, Vista Audio i34, Peachtree amp500, Adcom GFP-565 GFA-535ii, 545ii, 555ii
Digital: SimAudio HAD230 DAC, iMac 20in/Amarra,
Speakers: Paradigm Performa F75, Magnepan .7, Totem Model 1's, ACI Emerald XL, Celestion Si Stands. Totem Dreamcatcher sub
Analog: Technics SL-J2 w/Pickering 3000D, SimAudio LP5.3 phono pre
Cable/Wires: Cardas, AudioArt, Shunyata Venom 3
Post edited by markmarc on
Comments
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pm sent
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soldReview Site_ (((AudioPursuit)))
Founder/Publisher Affordable$$Audio 2006-13.
Former Staff Member TONEAudio
2 Ch. System
Amplifiers: Parasound Halo P6 pre, Vista Audio i34, Peachtree amp500, Adcom GFP-565 GFA-535ii, 545ii, 555ii
Digital: SimAudio HAD230 DAC, iMac 20in/Amarra,
Speakers: Paradigm Performa F75, Magnepan .7, Totem Model 1's, ACI Emerald XL, Celestion Si Stands. Totem Dreamcatcher sub
Analog: Technics SL-J2 w/Pickering 3000D, SimAudio LP5.3 phono pre
Cable/Wires: Cardas, AudioArt, Shunyata Venom 3 -
Excellent unit...Abbas Tube USB-SPDIF Converter with tube clocksAbbas V2 SE Tube DACAltmann Attraction DACNon-Pre passive preampYamaha M2 AmplifierDIY TPA3255 Mono Amps6L6 Williamson amplifier42 SET amp6V6 SET ampMcIntosh XRT18 speakersApogee Centaur MinorPioneer PAX A30 speakers
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Arrived today,looks like new and very well packed thank you, off to Canada tonight but will hook it up this weekend...thanks again
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Glad to hear it arrived safely. Enjoy!Review Site_ (((AudioPursuit)))
Founder/Publisher Affordable$$Audio 2006-13.
Former Staff Member TONEAudio
2 Ch. System
Amplifiers: Parasound Halo P6 pre, Vista Audio i34, Peachtree amp500, Adcom GFP-565 GFA-535ii, 545ii, 555ii
Digital: SimAudio HAD230 DAC, iMac 20in/Amarra,
Speakers: Paradigm Performa F75, Magnepan .7, Totem Model 1's, ACI Emerald XL, Celestion Si Stands. Totem Dreamcatcher sub
Analog: Technics SL-J2 w/Pickering 3000D, SimAudio LP5.3 phono pre
Cable/Wires: Cardas, AudioArt, Shunyata Venom 3
