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Thread: Measuring the frequency response of tape playback electronics

  1. #11
    Join Date
    Apr 2014
    Fairfax, VA
    Quote Originally Posted by topoxforddoc View Post
    If I want to do this properly, what else do I need apart from the ST1510A plus suitable MRL tape? It seems quite hard to find a ST1510A in the UK or Europe. Is there another machine I could use instead?
    As Fred pointed out, you don't need an ST1510A or any other machine to generate a plot of the playback frequency response. You need the appropriate software and MRL tape. I use AudioTester V3.0 and an MRL tape that has a 20 to 20K sweep tone. See graph of my Tascam BR-20 playback response. Attachment 41142
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    Last edited by Tapetech; 05-19-2018 at 02:08 PM.

  2. #12
    Member Sponsor Addicted to Best!
    Join Date
    May 2010
    Seattle WA area
    I use ST1510A's but the fans in them are driving me mad. What 2 channel quality sound card are you using?

  3. #13

    I put a resistor in series with the fan to quiet it down - can check the value/wattage if you'd like


  4. #14
    Join Date
    Apr 2014
    Fairfax, VA
    I am using a Focusrite USB interface.

    Here is another 20 to 20K playback FR plot using my new tape preamp, Flux Magnetics head and Technics transport.

    Last edited by Tapetech; 05-22-2018 at 04:18 PM.

  5. #15
    VIP/Donor [VIP/Donor] microstrip's Avatar
    Join Date
    May 2010
    Still using the old EMU tracker.

    The nice extra is that it includes a 48v phantom supply for the ECM8000, needed when I want to use it with REW for acoustics.
    DCS Vivaldi 2.0 stack, Soundlab A1 Px's while waiting for the XLF successor, EMT927, SME3012R, ARC Phono 3, Lamm ML1.2 Ref, Lamm L2ref, Stealth Dream speaker , Crystal Dreamline ICs, TA XL digital, TA XL gen V power cables, CenterStage footers and Nordost Qkore8's!

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