The Zoom A2 is a Acoustic Guitar Effects Pedal, which introduced in 2005. The product is a multi-fx stomp box-replacing the old 504 unit in the product line-up. It based on an all-new ZFX-3 processor. Optimized for acoustic guitar, the Zoom A2 comes with seven effects modules with 45 effects types, an ultra-wide frequency response of 20Hz-40kHz, a built-in drum machine with 40 rhythm patterns, an integrated chromatic tuner. it has a footprint of about 9″ x 9″. It has four rotary knobs, 5 solenoid (soft-touch) buttons and two heavy contact foot switches for scrolling between patches. The construction appears to be some type of anodized aluminum with a green finish.
According to several user reviews of Zoom A2, some users have praised it for the excellent sound quality; very sturdy, mostly metal case and solid foot switches; modifying the presets or creating new ones is easy. But some users also have complained for the 1/4″ TRS (stereo) output and (L/R) 1/4″ TS outputs would be better.
Image source: gametabs.net
To restoring the factory settings of Zoom A2 power on while simultaneously holding the STORE button. When “AL'” appears in the display, press the STORE button again to start initialization of the program. The Factory Reset procedure is complete.
Warning! This procedures will return all of the settings to the values when the Zoom A2 was shipped from the factory. Be sure that
you want to do this. Hopefully the article of “Hard Reset Zoom A2 to Factory Default” was useful.
Reference: Zoom A2 Manual