Recent content by Speedskater

  1. Speedskater

    Amps and subwoofer on power strip

    A pre-amp, mixer or receiver if you are using it's line level outputs to active speakers or subs. I guess an audio interface could be both a source ans a control unit.
  2. Speedskater

    Amps and subwoofer on power strip

    It's common for control units to output a DC pulse when turned off. And control units often turn off quicker than amps and subs. The pros have turn on and turn off sequence rules. Turn ON sequence : 1) audio source units 2) audio control units 3) amps (and active speakers) Turn OFF sequence ...
  3. Speedskater

    Upgrade of the day: Shorter cables

    But not with modern interconnect systems that have a low output stage impedance and a high input stage impedance.
  4. Speedskater

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    Well Wall Worts in general are a known source of RF interference. But well designed audio components shouldn't be too susceptible.
  5. Speedskater

    Shielded speakers cables

    Cable pickup of Radio frequency interference is a very situation specific type of problem. You need: a) a source of the interference. b) a cable of a length and placement to act as antenna. c) an audio component susceptible to interference at that frequency. Many if not most interference...
  6. Speedskater

    How do I measure an inductor coil without a LRC meter?

    If you are good at math and have a DMM with good frequency response. Make a series circuit of a resistor and the coil. Selectric a frequency and a resistor value so the the voltage across the resistor and the coil is the same. Then do the math.
  7. Speedskater

    What wire to build my own RCA interconnects?

    The Radio Frequency Characteristic Impedance of a cable or connector only matters when: The length of the cable or connector is a significant fraction of a wavelength at the frequency in question. So at 50 megahertz that length might be in the neighborhood of one meter.
  8. Speedskater

    Potentiometers and LR balance issue

    Use a signal attenuater to get the pot higher in the rotation, where the channel tracking is better.
  9. Speedskater

    What wire to build my own RCA interconnects?

    All the common coax cables that have an old RG designation and a braided shield are great for audio signals.
  10. Speedskater

    Quick ground question

    In the US, 3 phase AC is industrial & large commercial thing. Residential and light commercial use a single phase, center tapped 240/120 Volt system. The Safety Ground is attached to the Neutral at the main breaker panel. The exterior attachment to Planet Earth has little to do with day-to-day...
  11. Speedskater

    Volume limiter for the subs

    A more audio/video engineering orientated suppler and a great place for cables. https://www.markertek.com/
  12. Speedskater

    will this fully isolated preamp work?

    It's always suspect when the XLR connectors have pin 1 miswired. That's what AES 48 is all about.
  13. Speedskater

    Does turning up preamp to 50% and controlling volume with DAC sound better?

    In the all analog world, in theory the pest plan was to have all the stages go into clipping at about the same level. In the Digital to Analog world things are more complicated. Just how a DAC handles volume control is not always obvious
  14. Speedskater

    Solar panels

    Some US residential solar panel installations are a known source of interference.
  15. Speedskater

    Do USB Audio Cables Make A Difference?

    It's hard to test for interference suppression, you need: a) an interference source. b) cable placement and length to act as a receiving antenna of that interference source. c) an audio component that is susceptible to interference at that frequency.
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