audio_tony
Addicted to Fun and Learning
Here are measurements of the LJM DAC2496 (AK4393) DAC kit (still available on Ebay)
I built this around 2018 / 2019 IIRC.
The board has had some mods (specifics not shown here).
My test setup: Asus Xonar STX sound card with a self built buffer / gain box in front of that. Host PC is an Intel i7 running Windows 10 with 32G RAM and SSD - no mechanical disks or CDROM drive present.
I also use an Altor Audio Olivine-2 ADC, however the Asus Xonar was used these measurements.
Sound card input was set to 24bit/96kHz
I used an S.M.S.L. PO100AK as a USB to coax bridge.
I used Arta for the measurements.
Output to DAC was set to 24/192kHz
My DAC assembled:
@AnalogSteph If you thought the CS4398 was bad at 0dB wait until you see this...
Board as available from Ebay +others
Completed project:
THD 0dB
THD -3dB
THD -6dB
THD -30dB
THD -60dB
THD -90dB
Frequency response (sweep):
Frequency response (white noise (smoothed)
Jitter:
Multitone:
THD vs Frequency:
I built this around 2018 / 2019 IIRC.
The board has had some mods (specifics not shown here).
My test setup: Asus Xonar STX sound card with a self built buffer / gain box in front of that. Host PC is an Intel i7 running Windows 10 with 32G RAM and SSD - no mechanical disks or CDROM drive present.
I also use an Altor Audio Olivine-2 ADC, however the Asus Xonar was used these measurements.
Sound card input was set to 24bit/96kHz
I used an S.M.S.L. PO100AK as a USB to coax bridge.
I used Arta for the measurements.
Output to DAC was set to 24/192kHz
My DAC assembled:
@AnalogSteph If you thought the CS4398 was bad at 0dB wait until you see this...
Board as available from Ebay +others
Completed project:
THD 0dB
THD -3dB
THD -6dB
THD -30dB
THD -60dB
THD -90dB
Frequency response (sweep):
Frequency response (white noise (smoothed)
Jitter:
Multitone:
THD vs Frequency: