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Double Bass Wolf gone

My otherwise great romanian carved bass had a bad howling wolf between G# and A on the A and D string. It has another spot around the F# on the G string and on the D string in thumb position. But that one is not howling, just a loud resonance.

The weight thingy on the A string or D string afterlength did move it by a quartertone or so, but otherwise did not change much. I did play around with the after length some. The immediate result was usually that the wolf was gone, then a day later everything settled back to the same old.

Anyway, I think I saw somewhere a wolf suppression product that was fixed to two afterlegth strings with a weight in between. I decided to try my own version with a rubber band and a hex bolt.
wolf_01.jpg


Wolf is completely gone. The A is still louder, and there is a hesitation when I play the A harmonic on the A string, but the howling is completely gone. I don't think the overall resonance suffered. The F# issue is still there. I tried a couple of other combinations, for example I removed the weight. Which made the howl come back.

Maybe this helps someone.
 
This is a solid hack.

Sometimes my instructor puts blue painters' tape on his afterlengths (on his 30K bass) to stop unwanted resonance. Very classy.

Personally, although it seems super-expensive (at $124.00 US), the Wolf Terminator did it for me. You can fine tune the wolf frequency it cancels with the allen wrench, and you can increase / decrease it's efficacy based on placement (how close it is to the bridge).

But this is a solid hack in a pinch.
 
I finally removed the whole mess and got the Wolf Terminator. Best solution so far. W. is not completely gone but playable, and overall resonance is not suffering. Or rather improved.
Still struggling with the F-wolf in the upper register...