Measurements on slightly larger v1.1 boards:
- Superb performance using the best configuration, peaking at -112 dB to -114 dB THD+N
- Excellent performance using cheaper components
- Lots of changes on PCBs
Follow-up on AK4490 test board measurements
- Comparing cheap LDOs to superb LT3042
- LP2992 shows excellent performance
- AK4493 vs. AK4490
- Even better performance
- Almost pin compatible
- New v1.1 boards in production
- Slightly larger but still ‘wee’
- Supports AK4490 and AK4493, and different LDOs
- Possibly two or three assembly versions with different price and performance
Measurements and experiments carried out on a more spacious AK4490 test board
- Better understanding on improving AK4490 performance
- Encouraging results regarding Wee DAC performance goals
- Massive boost of 10-15 dB in THD+N at low frequencies
- THD+N at 1 kHz measured beyond -110 dB on test board
- Does not mean Wee DAC will achieve these though
- Modifications will increase BOM cost so need to consider the benefits and find a good compromise
I bought a second hand M-DAC a while ago to have a well-known commercial reference in terms of measurements and sound. After teardown it is time for measurements. The first part focused on the base performance and this second part dives into the digital filters and their impact on measurements.
I bought a second hand M-DAC a while ago to have a well-known commercial reference in terms of measurements and sound. After teardown it is time for measurements. This first part consists of basic performance measurements.