Recommended for use on Roland and BOSS products, this power supply could do with better quality cable insulation. With frequent use, the rigid coating on the DC output cable is prone to cracking where it meets the adapter, exposing the bare copper wire and eventually leading to a short circuit and possible damage to equipment. As a rule, I now wrap the cable with electrical tape to reinforce it. A more supple wire option would prolong the usable life of this product.