Schiit Modi MB technical measurements

Discussion in 'Source Measurements' started by atomicbob, Aug 15, 2016.

  1. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    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
    Listening 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 part A

    Frequency Response
    20160812 Modi MB SE FR - USB.png

    Frequency Response (y-axis zoom)
    20160812 Modi MB SE FR y axis highly zoomed - USB.png

    Dynamic Range
    20160812 Modi MB SE dynamic range - USB.png

    THD+N
    20160812 Modi MB SE THD THD+N - USB.png

    IMD
    20160812 Modi MB SE IMD - USB.png

    Crosstalk
    20160812 Modi MB SE crosstalk - USB.png

    Inferred Jitter
    20160812 Modi MB SE inferred jitter - USB.png

    Inferred Jitter (x axis zoom)
    20160812 Modi MB SE inferred jitter - 2KHz BW - USB.png

    1kHz @ -70dBFS
    20160812 Modi MB SE 1KHz -70 dBFS - USB.png

    1kHz @ -90dBFS
    20160812 Modi MB SE 1KHz -90 dBFS - USB.png
     
    Last edited: Aug 15, 2016
    Jerry, compoopers, Golmang and 40 others like this.
  2. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    USB Input - Single Ended RCA output measurements part B

    20 Hz square wave -1.6 dBFS 5Vpp 10ms
    20160812 Modi MB SE 20 Hz sqr 5 Vpp 10mS div - USB.png

    20 Hz square wave -1.6 dBFS 5Vpp 500us
    20160812 Modi MB SE 20 Hz sqr 5 Vpp 500uS div - USB.png

    1 kHz gain linearity
    20160812 Modi MB SE 1KHz gain linearity - USB.png

    Imaging
    20160812 Modi MB SE imaging - USB.png

    Measurement Setup
    IMG_1383a.jpg
     
    Last edited: Aug 15, 2016
    Lyander, Golmang, auri and 8 others like this.
  3. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    SPDIF Input - Single Ended RCA output measurements part A

    Frequency Response
    20160812 Modi MB SE FR - spdif.png

    Frequency Response (y-axis zoom)
    20160812 Modi MB SE FR y axis highly zoomed - spdif.png

    Dynamic Range
    20160812 Modi MB SE dynamic range - spdif.png

    THD+N
    20160812 Modi MB SE THD THD+N - spdif.png

    IMD
    20160812 Modi MB SE IMD - spdif.png

    Crosstalk
    20160812 Modi MB SE crosstalk - spdif.png

    Inferred Jitter
    20160812 Modi MB inferred jitter - spdif.png

    Inferred Jitter (x axis zoom)

    20160812 Modi MB inferred jitter - 2KHz BW - spdif.png

    1kHz @ -70dBFS
    20160812 Modi MB SE 1KHz -70 dBFS - spdif.png

    1kHz @ -90dBFS
    20160812 Modi MB SE 1KHz -90 dBFS - spdif.png
     
    Last edited: Aug 15, 2016
    Golmang, auri, Dino and 2 others like this.
  4. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    SPDIF Input - Single Ended RCA output measurements part B

    1 kHz gain linearity
    20160812 Modi MB SE 1KHz gain linearity - spdif.png

    Imaging
    20160812 Modi MB SE imaging - spdif.png


     
    Last edited: Aug 15, 2016
    Golmang, auri, Dino and 3 others like this.
  5. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    Toslink Input - Single Ended RCA output measurements part A

    Frequency Response
    20160812 Modi MB SE FR - toslink.png

    Frequency Response (y-axis zoom)
    20160812 Modi MB SE FR y axis highly zoomed - toslink.png

    Dynamic Range
    20160812 Modi MB SE dynamic range - toslink.png

    THD+N
    20160812 Modi MB SE THD THD+N - toslink.png

    IMD
    20160812 Modi MB SE IMD - toslink.png

    Crosstalk
    20160812 Modi MB SE crosstalk - toslink.png

    Inferred Jitter
    20160812 Modi MB inferred jitter - toslink.png

    Inferred Jitter (x axis zoom)
    20160812 Modi MB inferred jitter - 2KHz BW - toslink.png

    1kHz @ -70dBFS
    20160812 Modi MB SE 1KHz -70 dBFS - toslink.png

    1kHz @ -90dBFS
    20160812 Modi MB SE 1KHz -90 dBFS - toslink.png
     
    Last edited: Aug 15, 2016
    Jerry, Golmang, auri and 3 others like this.
  6. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    Toslink Input - Single Ended RCA output measurements part B

    1 kHz gain linearity
    20160812 Modi MB SE 1KHz gain linearity - toslink.png

    Imaging
    20160812 Modi MB SE imaging - toslink.png
     
    Last edited: Aug 15, 2016
  7. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    USB to SPDIF and Toslink DDC (Gustard U12 XMOS) - Single Ended RCA output

    When a DDC is connected to the Modi MB via SPDIF or Toslink the DAC measures very similar to the respective dScope III digital feeds which have been presented above. Here are the jitter measurements and noise floors obtained with the U12 DDC.

    Inferred Jitter DDC USB - SPDIF
    20160812 Modi MB inferred jitter - u12 - spdif.png

    Inferred Jitter (x axis zoom) DDC USB - SPDIF
    20160812 Modi MB inferred jitter - 2 KHz BW - u12 - spdif.png

    Inferred Jitter DDC USB - Toslink
    20160812 Modi MB inferred jitter - u12 - toslink.png

    Inferred Jitter (x axis zoom) DDC USB - Toslink
    20160812 Modi MB inferred jitter - 2 KHz BW - u12 - toslink.png

     
    Last edited: Aug 15, 2016
  8. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    reserved 7/7 for additional comments and data if needed. Currently intentionally left open.
     
    Last edited: Aug 15, 2016
  9. jowls

    jowls Never shitposts (please) - Friend

    Friend
    Joined:
    Oct 3, 2015
    Likes Received:
    4,045
    Dislikes Received:
    1
    Trophy Points:
    113
    Location:
    43°S
    Excellent work as always @atomicbob.

    Modi Multibit is putting out some great numbers, but that is only part of the story with Multibit, isn't it ;)
     
  10. Slex

    Slex Rando

    Joined:
    Aug 7, 2016
    Likes Received:
    0
    Dislikes Received:
    19
    Trophy Points:
    1
    I wish you could throw in another alternatives better power supply then the cheap wallwart to measure.

    I'm on a audio grade power supply now. Its totally another level of SQ.
     
    Psalmanazar, Ash1412, SpaceLaser and 6 others dislike this.
  11. fraggler

    fraggler A Happy & Busy Life

    Friend
    Joined:
    Oct 1, 2015
    Likes Received:
    3,287
    Dislikes Received:
    6
    Trophy Points:
    113
    Location:
    Chicago, IL
    It already uses a linear power supply.
     
  12. Scott Kramer

    Scott Kramer Friend

    Friend
    Joined:
    May 3, 2016
    Likes Received:
    1,259
    Dislikes Received:
    3
    Trophy Points:
    93
    Huh? o_O So you are using a diff transformer? That's all the wallwart is in this case, there's no SMPS in there.
     
  13. Huxleigh

    Huxleigh Almost "Made"

    Joined:
    Mar 28, 2016
    Likes Received:
    946
    Dislikes Received:
    5
    Trophy Points:
    93
    Location:
    Somewhere dry
     
    Last edited: Aug 17, 2016
    SpaceLaser and Pyruvate like this.
  14. atomicbob

    atomicbob dScope Yoda

    Friend BWC MZR
    Joined:
    Sep 27, 2015
    Likes Received:
    13,269
    Dislikes Received:
    4
    Trophy Points:
    113
    Location:
    On planet
    I am a believer in using Linear Power Supplies in place of SMPS whenever possible. In the case of Schiit, all wall wart powered products use simple, good quality AC transformers, no SMPS. The engineers at Schiit also have a distaste for SMPS. To achieve a better power supply for the Modi MB is called the Bifrost MB, which has been measured and presented in another thread.
     
    Last edited: Aug 17, 2016
  15. Pyruvate

    Pyruvate Friend

    Friend
    Joined:
    Sep 29, 2015
    Likes Received:
    1,358
    Dislikes Received:
    0
    Trophy Points:
    93
    Location:
    Here
    So you spent like $250 on a "better" power supply? The same amount of money you spent on the Modi Multibit? The total amount of money could've gotten you a Bifrost Multibit? Smart.

    How long did you listen to the Modi Multibit with the provided wallwart before switching over to the power supply?
     
  16. ibzrg1570

    ibzrg1570 Facebook Friend

    Contributor
    Joined:
    Mar 24, 2016
    Likes Received:
    199
    Dislikes Received:
    0
    Trophy Points:
    43
    Location:
    San Francisco, CA
    I interpreted his statement as if he hadn't even listened to the Modi Multibit at all and just assumed it would sound/measure better.
     
    Huxleigh likes this.
  17. schiit

    schiit SchiitHead

    Friend
    Joined:
    Sep 28, 2015
    Likes Received:
    7,715
    Dislikes Received:
    2
    Trophy Points:
    93
    Location:
    Valencia, CA
    Home Page:
    If you want a super-powerful 14VAC 1.5A "audiophile grade linear power supply," AKA "wall-wart," (to replace the standard 16VAC/500mA wall-wart), you can buy one on the Schiit site for $15.

    No speculation on whether or not this improves anything. Just sayin.
     
    Psalmanazar, Ash1412, Merrick and 7 others like this.
  18. Huxleigh

    Huxleigh Almost "Made"

    Joined:
    Mar 28, 2016
    Likes Received:
    946
    Dislikes Received:
    5
    Trophy Points:
    93
    Location:
    Somewhere dry
    Um, guys, it's a troll. o_O Unless you intend your comment/questions rhetorically, there's really no point in addressing it.
     
    aufmerksam likes this.
  19. Pyruvate

    Pyruvate Friend

    Friend
    Joined:
    Sep 29, 2015
    Likes Received:
    1,358
    Dislikes Received:
    0
    Trophy Points:
    93
    Location:
    Here
    Nah. He has the Modi Multibit. I saw his posts on HF where he's hyping the "improved power supply". I'm betting he tried the wallwart for a minute and switched over to the power supply before even burning in the unit.
     
  20. aufmerksam

    aufmerksam Friend

    Friend
    Joined:
    Sep 28, 2015
    Likes Received:
    1,366
    Dislikes Received:
    0
    Trophy Points:
    93
    Location:
    E. Lansing, MI
    I call BS: the one you say is better has less VACs (whatever THOSE are)! Unless a product has moar of all the numbers that are big, and less of all the numbers that are small, I don't want to buy it.
     

Share This Page