Hi boldname,
You are right with the minimalistic DAC´s. But this is not the reason I designed this DAC. The main reason is that is a hobby. I don´t want to sell this DAC. So the costs are a minor point. Ok....it´s a little big great (standard Euro-format) 160x100mm.
Here are some headwords:
Last but not least the scaled pictures!
- Fully seperated grounds for analog and digital
- 4 layer PCB with gnd and power plane
- 7 power phases (TPS7A3301 and TPS7A4701)
- crystek cchd-575-50-100 ultra low noise crystal oscillator
- Full LME49990 I/V Stage
- LME49600 Audio Buffer for headphone
- Touchscreen lcd
- Amanero Combo384 USB module for 32bit I2s and DSD
- NO NEED TO REPOST PICTURES, RIGHT?
regards
666mille
Great job Mille!
finally finished my dac, it's a long journey. collecting parts for more than 1yr, testing different chassis, alot of drilling and sanding, but finally got it completed. Additional 4mm alum plate on the bottom is used to make an easy access to all parts entirely.
AD1865 with SRPP gainstage, pcb made by bella-audio.com. Today is the first time i put the power on, check digital and analog voltage before plug in chips / tube, then connect with qls qa350 and tadaaa, signal locking led turn on, it's time to connect output. Using creative T20 as testing, it's working for the first time running
AD1865 with SRPP gainstage, pcb made by bella-audio.com. Today is the first time i put the power on, check digital and analog voltage before plug in chips / tube, then connect with qls qa350 and tadaaa, signal locking led turn on, it's time to connect output. Using creative T20 as testing, it's working for the first time running
Attachments
my new dac for oppo 103 blu ray player.
but it has I2S input .
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It is fully functional such as volume control with OPPO remocon, HF filter selection ( can be selected through dip switch )
This DAC board can be used stand alone DAC board if +5V( digital), +,-15V ( analog ) power supply is provided.( with DP switch setting , it can receive normal I2S signal ). This functon will be good opportunity for those who want supreme quality DAC board as DIY project.
Features.
1. premium Sabre ESS9018 DACS chip
2. op amp: OPA1632 and LME49710 (metal can type can be installed ) or user can select his/her favorite OP amps ( interchable)
3. unbalanced output with gold plated RCA connector ( optional balanced output is provided)
4. using microprocessor for user favorite selection HF filter
5. Volume control with oppo remocon ( enabling direct connection to any power amplifier without pre amp for better sonic results in many case )
6. total ground isolation between OPPO main board and 2 channel stereo DAC section
7. all 8 of Sabre ESS9018 chip data inputs are used all for 2 channel stereo . ( oppo 105 shares with headphone amp, balanced and unbalanced output )
8. separated clock (Crytek CHD 950 100 MHz) with dedicated Very low ripple linear power regulator .
9. intensive use of local linear power supply (total 9 )
- separate analog and digital section of DAC chip .
- separate left and right section of DAC chip .
- dedicated power for 100 MHz clock
10. gold plated thick PCB
11. This DAC can be set to I2S input mode for connecting USB input mdule or I2S output CD players .
My integrated DAC
This is my Toslink -> CS8416 -> SRC4192 -> WM8741 -> LL1527XL DAC.
The output from the transformers is fed directly to pair of Holton's HPA-nxV200L R4 amplifiers powered by pair of Audio Power DPS-400/S1 SMPSs.
Built in volume control from WM8741 is used via PIC controller.
This is my Toslink -> CS8416 -> SRC4192 -> WM8741 -> LL1527XL DAC.
The output from the transformers is fed directly to pair of Holton's HPA-nxV200L R4 amplifiers powered by pair of Audio Power DPS-400/S1 SMPSs.
Built in volume control from WM8741 is used via PIC controller.
Looks very interresing.
Thinking myself of getting a similar setup. Do you use it for DSD playback? Have you compared it to other DAC'?.
I'm currently using a Durio Sound Pro with my Raspberry PI2 and a Toroidal Transformer. Do you think there would be a siginifcant difference between your setup and a RPi-Dac?
My setup is:
Durio Sound Pro & Chromecast Audio
--> Mezmerize DCB1
--> Pavel Dudek Gainclone PA03 (soon with Burson Audio OpAmps instead of Burr Brown OPA134PA)
--> Q-Accoustics 1020/1030 speakers (soon DIY sepakers)
PCM1704+DDNF+OPA627
Just sharing my recent build. I am using a Tekdevices WM8804 input receiver. I used the PCM1704 evaluation board schematic for the DF1704 and PCM1704 sections. I/V is a modified Pedja Rogic Discrete Diamond No Feedback stage. Omitted 2 mA current sources, changed I/V resistor to 2.5K Ohm and 470 pF Polystyrene capacitor. The OPA627 stage runs at a gain of 2 and operates as a voltage buffer for the DDNF I/V. Filter is passive based on Lundahl LL1690 line transformers wired as 2:1 step down. Build is outlined somewhat at the AD844 thread. Faceplate is African Paduk.
Just sharing my recent build. I am using a Tekdevices WM8804 input receiver. I used the PCM1704 evaluation board schematic for the DF1704 and PCM1704 sections. I/V is a modified Pedja Rogic Discrete Diamond No Feedback stage. Omitted 2 mA current sources, changed I/V resistor to 2.5K Ohm and 470 pF Polystyrene capacitor. The OPA627 stage runs at a gain of 2 and operates as a voltage buffer for the DDNF I/V. Filter is passive based on Lundahl LL1690 line transformers wired as 2:1 step down. Build is outlined somewhat at the AD844 thread. Faceplate is African Paduk.
Attachments
CS8416 +CS4398 + ECC88 or 6N6P Brosky un-balancer + PY82 HV PSU in CLCLCRC, all regulators are LM1085 or LM1086.
Since then, I have added an input micro switch at the back so I can switch between SPDIF RCA or Toslink (TORX147).
Real nice work there and great choice on cases they remind me of two separate manufacturers over there. Gotta' like the minimal no frills looks outside/ beast inside.
my new dac, which is not just a DAC, it includes an RPI. SW is Moode Audio now, but I will try Rune Audio soon too.
There are several things to do still, cable tie up etc., unfortunately the toroid has to be replaced too, it is noisy. I mean not in spread flux or electric noise, but without connecting an amp, in a silent room I can hear that. I need to replace and finish.
Regards,
JG
An externally hosted image should be here but it was not working when we last tested it.
There are several things to do still, cable tie up etc., unfortunately the toroid has to be replaced too, it is noisy. I mean not in spread flux or electric noise, but without connecting an amp, in a silent room I can hear that. I need to replace and finish.
Regards,
JG