Quadraverb volume randomly decreasing

I have an Alesis Quadraverb that sporadically experiences volume decreases for seemingly no rhyme or reason.

I am running my synthesizer (via the 1/4" headphone jack) into the mono in of the QV, and have the QV's out going into the line-in of my audio interface. Sometimes the QV will work flawlessly for an hour, other times it experiences the following issue...

The volume drops drastically, to the point where you basically need to crank the QV's ins/outs, the Synths out, and the audio interfaces line preamp all the way up to get close to a usable signal. If I unplug the cable from the synth's headphone jack and plug it back in, it seems to make everything work fine again. However, sometimes the issue will come back in just a few minutes, or might not happen again until the next day.

A few other notes:
-everything is routed through a patchbay (balanced 1/4" TRS jacks) using balanced TRS 1/4" cables. The patchbay works flawlessly for all my other outboard gear, so I'm not inclined to think it's the issue.
-I swapped out the cables and tested the synth direct in to the audio interface to confirm the cables, synth, and audio interface were not the culprit.

Any thoughts on what could be causing this seemingly random drop in volume? Thanks for your help!
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  • Hello,

    Thanks for posting. We value you as a passionate and loyal customer. Your product is one of our discontinued Legacy products. Please check online with third party forums, third party websites or you can contact our tech support team regarding your Legacy product for assistance. Please keep in mind, support for Legacy products is limited as we mainly support our current in-line products.

    Alesis World Headquarters (United States Office)
    Support Contact: 401.658.3131

    Alesis UK LTD (United Kingdom Office)
    Support Contact: +44 1252 896040

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    Support Contact: +49 2154-81299-20/-25

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    Support Contact: +81-3-6277-2231
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  • So... I THINK I may have found a solution, though this issue seems to come and go so I won't be convinced it's remedied until I don't experience the random volume fluctuations for a few days straight.

    Ultimately, the LED meter is super deceptive and I think drives the issue. Because the level always seems to stay super low, it's tempting to crank the input nearly 100%, and I think doing this overloads the unit and makes the volume cut out.

    So my solution has been to keep the Quadraverb input at about 12 o'clock (I still have the output around 3-4 o'clock), and then use an external preamp to crank the gain of the synth signal going into the Quadraverb. This way I'm getting a strong level in/out without relying on the Quadraverb input gain to do the work. I was experiencing the issue with more frequency than usual last night and once I did this setup it went away. So I'm hopefully... but like I said, still not 100% convinced it's a permanent fix.

    I'll post back if this ends up not being a permanent solution, but I'd be very curious if anyone experiencing a similar issue tried this out and had success.
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