22 Caliber Power Amp - DISCONTINUED

The 22 Caliber is a versatile 22-watt guitar head that fits in the palm of your hand. Just plug it into any 8- or 16-ohm speaker, and you'll get a big, sweet musical sound.

Crank the 22 Caliber's volume, and it'll go into overdrive -- like a vintage amp with a single volume control. Flip on the Bright switch to add some bite and definition.

It's not just a guitar head; it's a shrunken head, with all good voodoo.

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From the Blog
Posted 9/4/2013

Diego Ferri plays a Jehan Alain Choral which he transcribed for guitar with the help of a Holy Stain Distortion/Reverb/Pitch/Tremolo Multi-Effect and 22 Caliber Power Amp.

Posted 10/5/2011

John at Boynton demos the 22 Caliber Power Amp which delivers big sound and tone in a pocket-sized package.

Posted 6/2/2011


All things are as they were, except you are there (well…kind of). 1978, Apple Computer was two years old, cell phones… what are they? And EHX introduces a state-of-the-art 200 Watt Slave Amp. If you happened to make it into the Electro-Harmonix Hall of Science at 150 West 48th Street in NYC, you’d see several up on stage.

Over three decades have passed, and EHX is still re-defining amplification, now with the 22 Caliber and 44 Magnum Power Amps that can actually fit in the palm of your hand!

Click here to see the full ad

Previous Flashback posts:

Stay tuned, more EHX Flashback posts coming soon!

Posted 1/31/2011

The Tone King shows off the ultra-compact 44 Magnum Power Amp. The 44 Magnum delivers the sweet tone of the popular 22 Caliber Power Amp, but with a bigger bang!


Posted 5/10/2010

Whatsthatdudeplay.com is a popular music website with a focus on effects pedals. They just created their first ever “test drive composition” featuring the Electro-Harmonix 22 Caliber Power Amp, Cathedral Stereo Reverb, Deluxe Memory Boy Analog Delay with Tap Tempo, V256 Vocoder and Ring Thing Sideband Modulator.

You can hear it here.

Posted 4/29/2010

Paul Riario, Tech Editor for Guitar World Magazine, puts the Electro-Harmonix  
22 Caliber Power Amp through its paces.

Click here to read the review published in Guitar World Magazine

Posted 2/1/2010
"The world's smallest genuine amplifier?" See what the guys at musicradar.com had to say.

Click here for the full article

22 Caliber

Posted 10/21/2009

Posted 6/29/2009
Electro-Harmonix is pleased to announce the new 22 Caliber Power Amp, a versatile 22-watt guitar head that fits in the palm of your hand. Just plug it into any 4-, 8- or 16-ohm speaker, and you'll get a big, sweet musical sound.

Below is a quick video introduction from EHX engineering. The feedback toward the end is just guitar into a Big Muff Pi with Tone Wicker into the 22 Caliber into a 1x12 speaker cabinet:

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Quick Specs
22-watt power amp that fits in the palm of your hand
Handles 8/16 ohm speaker loads automatically
Bright switch adds presence and definition
Smooth and surprisingly loud
18-volt 1.66A power supply included
Dimensions in inches: 2.75 (w) x 4.5 (l) x 2.1 (h)
Dimensions in mm: 70 (w) x 115 (l) x 54 (h)
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Our new EH Strings allow you to capture every nuance of your playing style with lightning fast playability. Made of a pure nickel wrap with a specially-selected stainless steel, these sweet-sounding round wounds are truly like no other strings you've played. Not only do they last longer and stay in tune longer, but we think they're the best sounding strings ever made. Available in 9s, 10s and 11s.