Ive recently been building a pedal board for the function band shows I do. I own couple of Boss Pedals and have been trying to find a way to take up as little space as possible on my board. Usually this style of connector wouldn't be possible, but as I am using the same company pedals, the jack sockets line up perfectly... or so I thought.
I plugged two pedals in, and they seemed to work perfectly. So I wired everything up and took them on a gig. Cut a long story short, everytime I hit either of the pedals, there was a weird crackling sound. So after the gig the next morning I ran a few tests. Basically even though the Boss pedals appear to have the jack socket in exactly the same place, they're ever so slightly different. So whenever I pushed on one pedal, It would act as though I was pressing down on the jack socket on the other, therefore creating the noise.
Its a shame as these connectors are cheap, and small. As an alternative, I recommend "Rockboard" or 'EBS" patch leads. Thomann sell both. No noise, and equally as compact.