I installed the wolf eliminators on my cello C string and D string, where I had enormous wolfs (wolves? haha!) on the E. These did the trick amazingly well! Read more

My daughter had a wolf tone at F# very noticeable on the D string. I thought this went on the troublesome string but the rubber piece was too big and the whole device slipped down the string! I was going to return it until I learned it goes on C or G, no matter which string is problematic. It has fixed her wolf tone when installed on G. I thought we needed one per string, but you only need 1 per instrument so a 2 pack might be unnecessary. Read more

These are not high quality and do not fit standard cello strings properly. They also are to light to fully stop the wolf tone. If you want to make sure you stop the wolf tone, make sure the are brass (heavier) and buy them from your local music store. We ended up having to buy one from our local shop after these came and failed to do the job. Read more

My daughter's brand new cello made a weird warbling sound whenever she played F#. We thought it was a defective cello , and someone told her it would be an expensive repair. After popping this thing on the D string just below the bridge, the weird sound was fixed. What a relief! There's no instructions for use. For the next person trying to install, after you push the string through the slot of both the metal piece and the black rubber piece, then spin the rubber piece so the gap is opposite the gap in the metal piece. Now when you tighten the knob the string will be clamped against the rubber. Read more

We followed the helpful instructions in Konr Ness’s review to install this wolf tone eliminator. Spinning the inner rubber piece to close the opening is key. For us, we also had to remove the nut. It was making a rattling/hissing sound. Though I feel there is still an rare “growl” when she plays F# on the D string, my daughter is happy with how her cello sounds. Read more