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Thread: How to measure in- output of Symetrix SX202

  1. #1
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    How to measure in- output of Symetrix SX202

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    Hi!

    I bougt the Symetrix SX202 for 100 Euros (living in NL) from a private seller over the internet.
    He didn't ship with any power supply so I needed to get one myself, which wasn't that easy because in Europe 90% of gear = DC, not AC.
    I ordered this 16V AC 600mA powersupply on amazon: Rockpower Netzteil / Adapter 16V AC / 600 mA: Amazon.de: Musikinstrumente

    Now here is the problem, seller said the preamp is working fine, but it's not - maybe u can help me how to figure out what is wrong:

    My cables, DSP (RME multiface), mics are 100% working fine!

    I connected the unbalanced output 1/2 (tried every single output) of the Symetrix SX202 with the Input on my RME via 6.3mm jacks.

    When I push the polarity or -15dB knob on channel 1, my speakers nearly blow up, very loud crackle - even when +48V isn't activated and no mic is connected. If pushing the knob on channel 2, nothing happens.

    Besides that, mic 1 input seems to work - I get an input from the mic.
    Channel 2 is silent, I can 100% pullup the Gain, nothing.

    Can someone help me figuring out what the problem could be? I think it may has to do with the adapter.

    The 16V AC, 600mA adapter shows an output of 19.5V AC when I measure it with my meter. Could that be the problem?
    I wasn't able to measure the mA, doesn't show anything.

    Please help me.

  2. #2
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    CAUTION: Do not use any AC adapter other than the Symetrix
    PS-2, or an exact equivalent supply rated at 16V ac, 10va.
    ________________________________________________________

    and

    What Description
    POWER 5mm coaxial socket. Use Symetrix PS-2 power
    supply (16V ac, 500 mA), included with
    domestic units. The PS-2 is both UL and CSA
    certified. Accepts plugs with 2.5mm center pin
    (Switchcraft 760)


    and

    CAUTION: Do not use any AC adapter other than
    the Symetrix PS-2. Do not short the outputs. Do not
    stick your finger(s) into a light socket.
    ____________________________________________________

    and

    Power
    Requirements
    16VAC, 200ma (Symetrix PS-2, included)

    thats from the manual....

    Heres one online that seems to work with the Symetrix 202.
    16VAC Power Supply for Presonus/Symetrix | Pixel Pro Audio | Reverb

    if it's not happening in the room, it ain't gonna happen on tape.-HG

  3. #3
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    Symetrix PS-2 Power Supply for 200 series - New, Free Shipping

    maybe even closer...the only thing Im seeing odd is the inner sleeve, one states 2.1mm and the one you have states 2.5mm inner.
    if the PS is good.

    if it's not happening in the room, it ain't gonna happen on tape.-HG

  4. #4
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    Is the center + or - ?

    Yours is
    Polaritšt innen: nein

    The PS2 original is ??

    if it's not happening in the room, it ain't gonna happen on tape.-HG

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