12-strings are a mixed bag... For awhile, we had a lot of happy 12-string users and many that were not so happy. First things first, we have a money back guarantee so you can always return our capos for a full refund if it is not working out for you. That said, we have been working hard to make improvements so that our capos work well on ALL 12 strings. When we started getting reports of issues, we went out and tested a bunch of 12'ers until we found some that consistently didn't work well with our capos. In fact, I bought a Taylor GA3-12 that seemed to hate our capos and then got to work figuring out a solution with that guitar as my guinea pig.
After a lot of testing, we designed a new set of XL rubber fretpads (that should start shipping on 9/14) that are 2mm taller. The result is higher tension. This new set of XL fretpads solved the issue on my Taylor GA3-12 and on all of the 12'ers at my local Guitar Center too. While we were waiting for the new fretpads to come in, we sent out a few that we had from the pilot run and so far we have had good results.
However, the other day, I tried one of these new XL fretpad setups on an Ovation 12 string with heavy gauge strings and it did not have enough tension. Almost, but just not enough. So I then tested that capo and found that it was at the lower end of our acceptable spring tension range. I then tried one at the upper end and it worked perfectly. So the net net, is that I believe that this new solution coming out will solve the issue for the vast majority of 12-strings but probably not all. For some, we will need to provide capos with more tension.
With this in mind, we are working now on a HT (high tension) version of our capo for players that simply need more tension. We are currently working on determining the exact amount of extra spring force that we will add to this HT version. We want to add enough but not too much.
In the meantime, we suggest that if you are only intending to use our capos for a 12-string that you wait for this new version to be released. For those of you who already purchased your capo specifically for a 12-string and have not been able to get it to work properly, you have three choices:
1) you can return your capo for a refund now and decide if you want to buy one again later when we figure it out
2) you can request a set of complimentary XL fretpads to be sent to you to try out (should become available to ship on 9/14)
3) you can request to have a capo with higher spring tension sent to you to try out (should be available to ship by 10/17)
Thanks for your support as we work to create a better 12-string capo.
Please contact email@example.com if you would like to do one of these options.