orchardaudio Posted March 17, 2019 Share Posted March 17, 2019 Thank you very much, this is a great writeup. If any has questions don't hesitate to ask. Link to comment
orchardaudio Posted March 17, 2019 Share Posted March 17, 2019 13 minutes ago, pjmcos said: I am wondering if I can roll opamp from this device. How did you galvanically isolate the DAC the streamer? How many amp does this setup need? The DAC is not galvanically isolated from the RaspberryPI. Can you please elaborate on your other questions, I am not sure what you are asking. Link to comment
orchardaudio Posted March 21, 2019 Share Posted March 21, 2019 On 3/17/2019 at 3:47 PM, orchardaudio said: The DAC is not galvanically isolated from the RaspberryPI. There are companies that sell isolators if you are interested in that sort of thing. Link to comment
orchardaudio Posted March 23, 2019 Share Posted March 23, 2019 Link to how-to video for assembly of PecanPi DAC into optional case:https://youtu.be/78NWQz_Itzw Link to comment
orchardaudio Posted March 24, 2019 Share Posted March 24, 2019 6 hours ago, Joe09876 said: How did you achieve such parameters with just one board? A competitor from Allo uses 3 to 4 separate boards! Where is the difference? How does it compare in terms of actual sound quality? Will it work with Kodi (LibreELEC)? It will work with Kodi, it uses the existing Rpi-DAC driver. The specs are achieved by using high quality component, a high quality gold plated PCB with very good dielectric, and also with proper layout techniques by keeping digital and analog sections of the board from overlapping. Below are the implementation details. Implementation Details: DAC chips: Dual flagship Burr-Brown PCM1794As in monaural mode Digital HW Volume Control and Re-clocking: Crystek CCHD-575 oscillator -- ultra low clock jitter of 82fSec SRC4193 for volume control Output stage: True balanced dual different output stages Uses OPA1612s Low Noise Panasonic Resistors Proprietary filtering topology Ultra low noise analog power supplies: TPS7A4700 (4.17uV noise) for positive op-amp power supply TPS7A3301 (16uV noise) for negative op-amp power supply TPS7A4901 (15.4uV noise) for DAC Chips Headphone driver: Dual parallel OPA1622s The sound quality is very good, but I cannot compare it to other products you will have to make that determinations yourself, as everybody has different tastes. There are two more reviews that will be coming out shortly from https://hifipig.com/ and https://theaudiophileman.com/ Link to comment
orchardaudio Posted March 25, 2019 Share Posted March 25, 2019 4 hours ago, Joe09876 said: How long lasts the preorder discount? Till mid May. Link to comment
orchardaudio Posted March 25, 2019 Share Posted March 25, 2019 Yes DAC can be powered separately, there is a jumper that you can remove to allow powering the Pi individually. There are a total of 16 op-amps, in 8 packages. Two opamps per package. Link to comment
orchardaudio Posted March 27, 2019 Share Posted March 27, 2019 Specifications for XLR Output: Signal to Noise Ratio (SNR): 130dB (A-weighted) Dynamic Range (DNR): 125dB Total Harmonic Distortion + Noise (THD+N): -110dB or 0.0003% Output Voltage: 5Vrms Specifications for RCA Output: Signal to Noise Ratio (SNR): 127dB (A-weighted) Dynamic Range (DNR): 121dB Total Harmonic Distortion + Noise (THD+N): -110dB or 0.0003% Output Voltage: 2.5Vrms Specifications for Headphone Amplifier: 390mW peak power into 32 ohms 780mW peak power into 16 ohms General Specifications: Sampling Rates: Up to 192kHz Bit Rates: Up to 24-bit Size: 125mm (5") x 125mm (5") x 70mm (2.8") Frans Keylard 1 Link to comment
orchardaudio Posted May 3, 2019 Share Posted May 3, 2019 Due to popular demand preorder pricing has been extended till May 31st. PecanPi™ Streamer -- 399.99 -- 20% off The Streamer is a fully assembled and ready to go out of the box. Just plug it in, and enjoy. https://orchardaudio.com/shop?olsPage=products%2Fpcnp-strmr PecanPi™ DAC -- 224.99 -- 25% off Like the DIY approach? Then this is for you. https://orchardaudio.com/shop?olsPage=products/pcnp-dac Link to comment
orchardaudio Posted May 29, 2019 Share Posted May 29, 2019 Raspberry Pi DAC Shootout - Hamburg, Germany - June 13 There will be a double blind demo of multiple Rpi DACs including the PecanPi in Hamburg. It is completely free. For more info and to register email [email protected] More info here: https://forum.volumio.org/volumio-soundcheck-invitation-for-hamburg-germany-t5918-120.html#p63722 Ralf11 1 Link to comment
orchardaudio Posted May 31, 2019 Share Posted May 31, 2019 Preorder pricing ends in 4 hours: PecanPi™ Streamer -- 399.99 -- 20% off The Streamer is a fully assembled and ready to go out of the box. Just plug it in, and enjoy. https://orchardaudio.com/shop?olsPage=products%2Fpcnp-strmr PecanPi™ DAC -- 224.99 -- 25% off Like the DIY approach? Then this is for you. https://orchardaudio.com/shop?olsPage=products/pcnp-dac Link to comment
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