The SOS37 ’Xotic Boost’ pack contains 22 captures of the Xotic EP Booster in each of the ToneX, NAM Standard and NAM Nano formats. (Full details above.)
 
Here's what Xotic have to say about the pedal, 'What do the tones of renowned guitarists such as Jimmy Page, EVH and Eric Johnson have in common. They all used the legendary echo machine EP-3 as a pre-amp. We’ve captured that magic in the Xotic Effects pedalboard staple, EP Booster. We’ve used the highest quality parts with a discrete FET design and low impedance output, the EP 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.
 
Trod on (or often simply left on) by Dave Grohl, Mike McCready, Thurston Moore, Guthrie Govan, Graham Coxon, Andy Timmons and Phil X et all.
 
And finally, a few words about using boosts in Tonex:
 
All of our captures are gain compensated to help you make decisions based on tone and timbre rather than volume. As boosts primarily rely on making things louder, they can be a little underwhelming at first – the different settings are much more subtle than their overdrive/distortion/fuzz counterparts. (As some of them have EQ cuts they can also be rather quiet.)

The secret here is to use the volume control on the Tonex Software to give you the volume rise. When you do this the boost starts to behave as expected and, importantly, the pedals you’re boosting into react as expected. Trust us, it’ll bring a smile to your face! Stacking the pedals correctly is where the magic happens…