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BigDLarry

Spider II 212 weird whine/hiss issue

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Started a few years ago and I tried everything. Dozen cables, dozen guitars, active/passive pickups, dozen power cables, dedicated power from the fuze box, on a UPS battery backup for clean power, nothing helps.

On all modes/settings/effects combinations, my amp will randomly have what I can only describe as an extremely slow phaser effect? It slowly loses all low/mids and then gets all screechy/hissy/whiney. Suddenly like as if you popped your ears and they stop ringing it goes back to normal.

I looked at all of the boards, all caps and connections look good. At this point do I scrap it and buy another amp? Boards for these things aren't cheap and aren't guaranteed to not have issues in the future.

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Older product like that, probably likely it's an old and oxidized solder point on a surface mount component,

allowing a partial ground lift, resulting in the clock frequency to demodulate into the audio band.

 

Not a user repairable issue. Should be served at a Line 6 authorized service center that knows the product.

 

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