• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). Come here to have fun, be ready to be teased and not take online life too seriously. We now measure and review equipment for free! Click here for details.

ApplePi DAC w/ Volume-Clocker Measurements

orchardaudio

Active Member
Joined
Aug 24, 2018
Messages
181
Likes
195
Location
Succasunna, NJ
#1
I just wanted to make a comprehensive post of all measurements, of the ApplePi DAC and Volume-Clocker combo.

SNR A-Weighted (XLR):
1540949963620.png


SNR no-weighting (XLR):
1540950454562.png


SINAD (XLR):
1540948660662.png


Dynamic Range A-Weighted (XRL):
1540948579268.png


Dynamic Range no-weighting (XRL):
1540950582862.png


THD+N vs Level (XLR):
1540949733501.png


IMD vs Level (XRL):
1540948481426.png


Frequency Response (XLR):
1541723568978.png


THD+N vs Frequency (XRL):
1540948163701.png


Linearity (XLR):
1540949611075.png


Jitter (XRL) - 256k FFT with 16 averages:
1540947938726.png


Crosstalk (XLR):
1541159871415.png


If there is something else that you need please post and I will update.
 
Last edited:

derp1n

Senior Member
Joined
May 28, 2018
Messages
481
Likes
566
#2
Measurements without a-weighting.
 

pos

Senior Member
Patreon Donor
Joined
Feb 13, 2018
Messages
302
Likes
251
#5
That would be the Gala DAC...

@orchardaudio, could we get the same kind of measurements for the Gala? (including measurements with the SRC chip physically bypassed if possible, especially the jitter one)
 

restorer-john

Major Contributor
Joined
Mar 1, 2018
Messages
1,651
Likes
2,221
Location
Gold Coast, Queensland, Australia
#6
Orchard, I suspect your frequency steps on the AP are perhaps too coarse at the end of the FR test. I cannot believe the D/A would be -6dB at 20KHz.

orchard.JPG


When are you going to update the specifications on your website to reflect the actual results your products can achieve?
 

orchardaudio

Active Member
Joined
Aug 24, 2018
Messages
181
Likes
195
Location
Succasunna, NJ
#7
When are you going to update the specifications on your website to reflect the actual results your products can achieve?
What specification do you believe is wrong?
 

Grave

Senior Member
Joined
Jun 30, 2018
Messages
382
Likes
164
#8
107.5, 109.5. That's a 2 dB difference in SINAD between channels, weird.
 

orchardaudio

Active Member
Joined
Aug 24, 2018
Messages
181
Likes
195
Location
Succasunna, NJ
#9
Orchard, I suspect your frequency steps on the AP are perhaps too coarse at the end of the FR test. I cannot believe the D/A would be -6dB at 20KHz.
you are correct it is just a number of steps, that is the issue.

Here it is with more steps:
1541723520999.png
 
Top Bottom