This is a fascinating pedal from the folks at Xotic Effects, the EP Booster. They basically took the preamp circuit from an echoplex type unit and packaged into a skinny foot pedal design. This pedal recaptures the magical tone and nuances of the echoplex preamp and reveals the secret many legendary guitarists have known for a while. The video is courtesy of Pro Guitar Shop. Below is the skinny as described from the Xotics website.

What do the tones of renowned guitarist such as Page, EVH and Johnson have in common? They all used the legendary echo machine EP-3 as a pre-amp.
We’ve captured that magic in a new Xotic Effects pedal, the EP Booster.

We’ve used the highest quality parts available with a discrete FET design and low impedance output, the EP Booster provides up to +20dB of unadulterated boost with multi-dimensional, shimmering highs and lows, and no ear fatigue. The internal DIP switches let you choose the boost frequencies, and EQ settings.

Housed in a small 3.5″x 1.5″ x 1.5″ case with blue LED and transparent knob, the EP Booster can be powered by 9-volt up to 18-volts.

A simple pure boost that pays reverence to the magical EP-3 and captures the celebrated tones of the world’s most famous players.

Visit Xotic Efects website