Fed up with having very limited space on my desk, what with controller keyboards, computer keyboards etc. and trying to write on notepads balanced on my knee I decided to try and declutter. The most obvious start was the large mixer that took up the most space and with wires and cords trailing all over I was more than pleased when I discovered the A138p/o. It had all the control and function that my huge and ancient desk top mixer provided with the big plus of no current draw itself and the ability of being built up to any number of modules, within reason. With my own home built case there was no problem with space on the rails and I now have room to work on the desktop. It doesn't hum like the old one either.