Strange white noise problem with Event ASP8 active monitor...

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Max Dread, Jan 17, 2015.

  1. Max Dread

    Max Dread Member

    Messages:
    2
    Joined:
    Jan 17, 2015
    Hi all

    I have a pair of Event ASP8 Active Studio Monitors…. One of them has a fault whereby it usually makes a horrible white noise type sound when first switched on. Links to samples of the noise can be found below.

    This noise happens when you first turn the speaker on. Sometimes it is very loud, sometimes quieter. It can fluctuate quite a bit between each time I turn the speaker on. Usually it is the same type of white noise sound, but sometimes there is the added weird sound as can be heard best in samples 3 and 4. In the past, the sound would only last for a few minutes, but in recent months it has become increasingly longer (sometimes over an hour). The sound almost always eventually goes away and the speaker is fine there after. Usually it "dies down" and gets quieter and quieter before going away completely (rather than disappearing suddenly).

    Although the problem has been going on for quite a few years now, during those years there have been periods of weeks or even months where it has cured itself. God knows how or why! It has been a consistent problem for well over a year now though.

    More recently I realised that pressing and wiggling the Input Sensitivity knob on the back panel SOMETIMES makes the problem go away. On some occasions it does so instantly, on some it just seems to accelerate the return to normality. Sometimes I wedge a match stick in to keep the knob at the angle needed for the problem to disappear. Does not always work, but sometimes does. Wiggling the Input Sensitivity knob will always have an effect on the white noise; changing its volume or the tome of the noise.

    Generally, the speaker is A LOT louder while the problem is occurring, and it seems to be a case of the louder the “white noise”, the louder the volume of the speaker. It is the correct volume once the noise goes away.


    I've been told that the problem is a couple of bad capacitors and I wondered whether you guys think what I have described sounds like bad caps?

    Many thanks and sorry for such a long first post!

    Max

    https://soundcloud.com/maxdread-2/1-event-speaker-noise-white-noise-1

    https://soundcloud.com/maxdread-2/2-event-speaker-noise-white-noise-2

    https://soundcloud.com/maxdread-2/3-event-speaker-noise-white-noise-3

    https://soundcloud.com/maxdread-2/4-event-speaker-noise-white-noise-4
     
  2. Max Dread

    Max Dread Member

    Messages:
    2
    Joined:
    Jan 17, 2015
    Hi again

    Just wanted to add a new observation. When I have a day or two off work I tend to keep the speaker on to prevent the issue occurring. In the past (for several years in fact), the speaker would remain problem free once the noise disappeared, until the next off/on cycle. Since the inspection, this is no longer the case. It can be problem free for many hours but the noise does sometimes return. I left the speaker on last night. In the morning it was still fine.

    Everything else in the studio is switched off at the wall. When I turned on the switch for everything else in the studio, the noise instantly returned to the monitor. I guess it could have been coincidence but it seems unlikely...

    Just thought I'd add this in the hope that it might offer some insight.

    Cheers
     

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