atomicbob
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The Modi MB data presented were collected as follows:
1. PrismSound dScope III, picoscope 5243B
2. DAC unbalanced output RCA
3. 100 Kohm load used for measurements
4. 44 KHz sample rate, 24 bit depth
5. USB input – Audioquest Forest
6. SPDIF input - Tecnec B-B-6in with 75 ohm BNC to RCA adapters
7. Toslink input - generic 12 inch toslink cable
8. Unbalance cable DH Labs Silver Sonic Air Matrix RCA
9. Vaunix Lab Brick USB hub
10. USB to SPDIF DDC - Gustard U12 XMOS
Modi MB - AD5547CRUZ resistor multibit 16 bit resolution DAC
Measurements were performed over a period of 6 hrs after 24 hrs warmup.
Notable highlights:
Substantially similar to Bifrost MB with the following differences of interest:
1. slightly lower resolution - see -70 and -90 dBFS sine
2. sligthly less dynamic range
3. higher residual noise floor as seen on jitter measurements
Excellent channel matching like the other Schiit MB DACs
Llistening evaluation finds the multibit magic of dimension and depth present
Incedible performance for a 16 bit resolution DAC at this price point
USB Input - Single Ended RCA output measurements
Frequency Response
Frequency Response (y-axis zoom)
Dynamic Range
THD+N
IMD
Crosstalk
Inferred Jitter
Inferred Jitter (x axis zoom)
1kHz @ -70dBFS
1kHz @ -90dBFS
20 Hz square wave -1.6 dBFS 5Vpp 10ms
20 Hz square wave -1.6 dBFS 5Vpp 500us
1 kHz gain linearity
Imaging
Measurement Setup
1. PrismSound dScope III, picoscope 5243B
2. DAC unbalanced output RCA
3. 100 Kohm load used for measurements
4. 44 KHz sample rate, 24 bit depth
5. USB input – Audioquest Forest
6. SPDIF input - Tecnec B-B-6in with 75 ohm BNC to RCA adapters
7. Toslink input - generic 12 inch toslink cable
8. Unbalance cable DH Labs Silver Sonic Air Matrix RCA
9. Vaunix Lab Brick USB hub
10. USB to SPDIF DDC - Gustard U12 XMOS
Modi MB - AD5547CRUZ resistor multibit 16 bit resolution DAC
Measurements were performed over a period of 6 hrs after 24 hrs warmup.
Notable highlights:
Substantially similar to Bifrost MB with the following differences of interest:
1. slightly lower resolution - see -70 and -90 dBFS sine
2. sligthly less dynamic range
3. higher residual noise floor as seen on jitter measurements
Excellent channel matching like the other Schiit MB DACs
Llistening evaluation finds the multibit magic of dimension and depth present
Incedible performance for a 16 bit resolution DAC at this price point
USB Input - Single Ended RCA output measurements
Frequency Response
Frequency Response (y-axis zoom)
Dynamic Range
THD+N
IMD
Crosstalk
Inferred Jitter
Inferred Jitter (x axis zoom)
1kHz @ -70dBFS
1kHz @ -90dBFS
20 Hz square wave -1.6 dBFS 5Vpp 10ms
20 Hz square wave -1.6 dBFS 5Vpp 500us
1 kHz gain linearity
Imaging
Measurement Setup