The PX4D is a guitar and bass multi-effects processor. It can be run on four AAA alkaline batteries, which allow for 10 hours of continuous use with the backlight off or 7 hours of continuous use with the backlight on. The PX4D can be run off an AC adapter (4.5 volts, 500 milliamps. The electric current is polarized to run positive (+) from the AC adapter. When using a universal AC adapter to power the PX4D, it needs to be set it to (+) to ensure the unit is correctly powered. The unit requires 2.25 Watts of electricity.
The PX4A is an acoustic personal effects multi-processor. It can be run off four AAA alkaline batteries, which allow for 10 hours of continuous use with the backlight off, or 7 hours of continuous use with the backlight on. It can be run off an AC adapter (4.5 volts, 500mA) with the power current polarized to run positive (+). The unit requires 2.25 Watts.
The Korg ToneWorks AX1500G is a multi-effects processor that offers pedal control for a number of its effects. It can only be run from a 9-Volt AC adapter (DC9V), included with the device. The pedal can be linked to other pedals using a product such as a 5-spot, which plugs into a wall and allows you to power up to 5 pedals using one AC adapter.
The ToneWorks PXR4 is a multi-track digital recorder. It can be run off two AA alkaline batteries. Alternately, you can plug it into a wall with an included 4.5-Volt AC adapter. It requires 20 Watts. The AA batteries can be either standard disposable batteries or rechargeable batteries.