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PecanPi®+ Implementation, Spec, & Test Results

Implementation

DAC Chips

Asahi Kasei Microdevices (AKM) flagship AK4499EXEQ combined with AK4191EQ

Clocking

Crystek CCHD-575 oscillator — ultra-low clock jitter of 82fSec

S/PDIF Receiver

Cirrus Logic CS8416

Output stage

True balanced fully differential output stages, using OPA1612s, low-noise Panasonic resistors, and proprietary filtering topology

Ultra-low Noise Linear Power Supplies

LT3045 (0.8uV noise) for positive op-amp power supply
LT3090 (18uV noise) for negative op-amp power supply
LT3042 (0.8uV noise) for DAC Chips

Headphone Driver

Dual parallel OPA1622s for regular headphones
Quad parallel OPA1622s for balanced headphones

Specifications

XLR Output (including headphone driver):

Signal-to-Noise Ratio (SNR): 133dB (A-weighted)
Residual Noise: 1.174uV (A-weighted)
Dynamic Range (DNR): 129dB
Total Harmonic Distortion + Noise (THD+N) @ 0dBFS: -116dB or 0.00016%
Total Harmonic Distortion + Noise (THD+N) @ -6dBFS: -119dB or 0.00011%
Frequency Response: DC (0Hz) to 22kHz @ 48kHz sample rate
Frequency Response: DC (0Hz) to 44kHz @ 96kHz sample rate
Frequency Response: DC (0Hz) to 88kHz @ 192kHz sample rate
Output Voltage: 5.22Vrms (+16.6dBu)

RCA Output (including headphone driver):

Signal-to-Noise Ratio (SNR): 128dB (A-weighted)
Residual Noise: 1.308uV (A-weighted)
Dynamic Range (DNR): 124dB
Total Harmonic Distortion + Noise (THD+N) @ 0dBFS: -112dB or 0.00025%
Total Harmonic Distortion + Noise (THD+N) @ -6dBFS: -116dB or 0.00016%
Frequency Response: DC (0Hz) to 22kHz @ 48kHz sample rate
Frequency Response: DC (0Hz) to 44kHz @ 96kHz sample rate
Frequency Response: DC (0Hz) to 88kHz @ 192kHz sample rate
Output Voltage: 2.61Vrms (+10.6dBu)

Regular Headphone Output:

Power into 16Ω: 851mW peak
Power into 32Ω: 425mW peak
Power into 150Ω: 91mW peak
Power into 300Ω: 45.5mW peak
Output Impedance: < 550mΩ

Balanced Headphone Output:

Power into 32Ω: 1.7W peak
Power into 150Ω: 363mW peak
Power into 600Ω: 90mW peak
Output Impedance: < 60mΩ

Input Power:

Input Connector: Barrel Plug, 2.1mm I.D. x 5.5mm O.D. x 9.5mm
Input Voltage: 9VDC
Input Power: 20W Max (w/ Raspberry Pi)

Size:

Streamer / Ultra: 195 x 120 x 100mm (7.7 x 4.75 x 4.25in)
DAC: 97mm (3.82”) x 78.5mm (3.09”) x 38.1 mm (1.5”)

General

Sampling Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, and 384kHz (S/PDIF limited to 192k)
Bit Rates: 16, 24 and 32-bits (S/PDIF limited to 24-bits)
Formats: Supports all formats. DSD is converter to PCM before playback.
DAC Compatible Rpi Models: 1B+, 1A+, 2B, 3B, 3B+, 4B, 5, Zero, & ZeroW
DAC Compatible Asus Models: Tinker Board & Tinker Board S
S/PDIF Input: Compatible with all sampling and bit rates listed above

Test Results

Signal to Noise Ratio (SNR) XLR Output

Dynamic Range (DNR) XLR Output

PecanPi+ Jitter Spectrum and Noise 256k FFT, 16 Averages (XLR)

THD+N vs Frequency XLR Output

THD+N Ratio vs Freq XLR Output

Intermodulation Distortion (IMD) XLR Output

Multitone XLR Output

Signal to Noise Ratio (SNR) RCA Output

Dynamic Range (DNR) RCA Output

Jitter Spectrum and Noise (RCA)

THD+N vs Level RCA Output

THD+N Ratio vs Freq RCA Output

Intermodulation Distortion (IMD) RCA Output

Multitone-FFT-Spectrum-RCA

About Our Company

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   Orchard Audio LLC
   51 Google reviews 
 
  
        
   Orchard Audio LLC
   51 Google reviews 
 
 
 
         
   E Lins 
 2024-02-12
 
 
   Friendly place, honest and knowledgeable guy. Direct and frank exchange, business-driven up-to-the-point purchases.
  
 
 
       
   Wing Ng 
 2024-02-11
 
 
   Leo was great to deal with and responsive in working with me to make sure I was satisfied with his amp.
  
 
 
       
   Robert Audet 
 2023-07-18
 
 
   If Leo was a DAC, he'd be top of the line for sure.  Few years back when I first heard of Orchard Audio, checked their initial product which was right up their with this new trend of SBCs out of the UK which made robotic learning for kids the new hype, as well as low cost, high quality devices for men and their guilty pleasure, the SOUND.
What made it very interesting is that in the world of RaspberryPi, HifiBerry and so many others, you had this company who's owner and creator was a rock star among us men.  Everyone was talking about Leo this and Leo that.  The product reviews, although always among the most recommended, still came after all the praise for Leo.
Yesterday I got my Orchard-Audio PecanPi Streamer from a private vendor.  The unit was 2nd hand, it arrived in a box with nothing else but a note: Enjoy the music.
Of course nothing worked as I had hoped it would and I was left with no other choice but to contact the company for HELP!
I got on a chat line with someone at the company and that person soon discovered that we were both talking different languages and where could not even described my new purchase  correctly.  Well lucky for me, that person did not give up on me, he tried one thing, and then another, and this went on until we hit a key word that brought us together on the same page, with a sudden clear understanding of what I had to do.  45min. that's all it took after that for me to get my new PecanPi  Streamer connected, with a new SD card in and a fresh configuration.

That was the moment when music started playing, not any kind of music, but for me at least, the MUSIC that I as a man have been evolving to.  I have now reached plenitude and am now ready to die if I must, but before, please let me listen to that music a little while longer.  Oh!, did I mention that the poor sole at the end of the chat, the one who walked me through Dante's Inferno, well, yeah it was indeed...Leo.
Leo thanks for the MUSIC and for being you.
Robert Audet
  
 
 
       
   Robert A Rust 
 2023-07-01
 
 
   Leo, after our discussion at the Florida International Audio Fest, I am so glad that you built a three channel amplifier, the Duo/Trio. Just having a single power cord to get your amplification over three mono amps with power supplies and power cords is a great help. More importantly, it goes extremely well with my tube amplifier used for my front speakers. I think the GanFet class D works well for the other three speakers because it matches closely to the power rating of the tube amp,  adds clarity to the center channel, and balances the frequency in the rear speakers, without competing with the front speaker pair. I also think that the use of the RCA to XLR converters are important to use instead of XLR to RCA cables. The increase of 6 dB improves the sound and allows the Duo/Trio to work optimally. Why buy an amplifier and then not use it to its full capacity? Anyone who wants to purchase this three channel amp, or any other of your amps, should seriously consider adding these converters to their system. To this point, I like the converters so much that I am ordering a third for my tube amplifier to insure that I am getting a fully balanced performance.

Great job all around, thank you for taking the plunge. I hope this amplifier helps all of those people looking to upgrade their amplifiers using an Audio Video Receiver or processor, including those with tube front channels.
  
 
 
       
   Ronald Hale 
 2023-06-16
 
 
   Leo is awesome! He is the owner. Very quick shipping! Great product! And great customer service. I have asked way too many questions. And he always answers the same day.
  
 
 
       
   Dominic Rushe 
 2023-04-25
 
 
   TL/DR: Sounds amazing. Extraordinary customer service. Highly recommended.

I have wanted to add a streamer to my hifi for a while - Rega Brio, KEF LS50s, CD and record player. But which one and what sort? Roon? Sonos? Bluetooth? WiFi? I went down the rabbit hole of reviews and forums.

I am not a technophobe by any means but a lot of the info I found was too technical and confusing. I just wanted a plug and play streamer for Tidal and was thinking of getting an Audiolab 600N. I didn’t want to spend too much as the tech seems to be advancing.

Then I read a John Darko piece about Raspberry Pi streamers and thought that seemed like an elegant solution but one that was too much of a DIY project for me to do by myself. More Googling and I found Orchard Audio.

Here’s a dude (Leo) in New Jersey with “decades of engineering expertise” at big companies making reasonably priced streamers that get great reviews. What’s not to like?

I bought the PecanPi, it arrived really quickly. It’s small, sturdy and has a solid, homemade feel that I love. I couldn’t wait to try it out.

I chose the Volumio option after discussion with Leo. Plugged it in and nothing. Ugh. I rebooted everything  (all very IT Crowd). Nothing. So I emailed Leo. Ten minutes later he had emailed me back. Problem was fixed (turned out it was just some glitch in my internet) but it was clear to me that Leo was on the case if I had issues.

So now it is up and running and it’s phenomenal. Hifi descriptions of sound are as impossible as wine reviews, it’s so subjective, one man’s blackberry and slate is another’s blueberry and tar. But for me the PecanPi (in my smallish NY apartment) is big, detailed, has a great, intimate, 3D feel and sounds as good playing Satie as it does the Oh Sees.

Very happy customer. Thank you!
  
 
 
       
   Jonathan 
 2023-03-29
 
 
   I was looking for the best GAN based Class D amplifier I could and stumbled across some positive reviews of the Starkrimson Ultra Gan amplifier.  My initial buying experience was atypical in that the amplifier wasn't able to deal with my 125vac due to it triggering the overvoltage circuit to cut off the amplifier. I'm not going to sugar coat it; I reacted a bit too hastily with my words g g and well in the end cooler heads prevailed and Leo agreed to put a better regulated replacement power supply and solved the problem for me. Right out of the gate this amp has a very deep punchy bottom end.  The midrange drivers and AMT tweeters sound as good as I've ever heard them now.  I'm glad I kept this amplifier as it offers so much better control over the bass with extremely natural sounding mids and high. I highly recommend you audition the Starkrimson Ultra before checking out other class D or Gan based amps
  
 
 
       
   Michael Valentiner 
 2022-12-29
 
 
   Orchard Audio Starkrimson Stereo Ultra Review
Michael Valentiner

A big thanks to Leo for the opportunity to evaluate the Orchard Audio Starkrimson Stereo Ultra amp.

It is hard to add anything that hasn't been already said about this amp. It is detailed, dynamic, lively, has well defined bass, etc. Superlative in many aspects.

Detailed, smooth, and bright. Musical notes are very articulate and distinct from one another. Great separation of musical instruments. Percussion instruments are rendered in great detail. I was hearing things I hadn't heard in the mix before.
  
 
 
       
   Riley Leclerc 
 2022-11-26
 
 
   These little monoblocks paired with the streamer as a pre-amp is the smallest footprint endgame stereo set up out there.
  
 
 
       
   stuart cadman 
 2022-10-08
 
 
   I bought a PecanPi 18 months ago yet Leo didn't hesitate to advise on solving a technical issue I ran into today. Top Man!

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