Please note:

This is not a tube amplifier power attenuator. If you run from amplifier speaker out into this device, it WILL damage your amplifier.

This is intended to go in the series effects loop of a loud amplifier and act as a master volume control. Do not use with a parallel FX loop. It will not produce the intended effect.

• This box is great for tube amplifiers where you get the majority of distortion tone from your preamp
• Gently-used with very light wear on the enclosure and sticker (see photos)
• Ships with original box, packaging, and sticker
• Comes from a smoke-free home

From the JHS website:
"Taming a screaming-loud tube amp doesn’t always require bulky and expensive load boxes and attenuators. If your amp has a series effects loop, the JHS Pedals Little Black Amp Box takes care of the job while being able to fit into the palm of your hand. Simply run it through your amp’s effects loop and control the amount of signal you send to your amplifier’s power section. You’ll love the way the Little Black Amp Box lets you really push the front end of your amp for the natural feel and tone that you can’t get any other way. And your bandmates, sound engineer, parents, neighbors, significant other, and pets will love the way it can keep your volume down to bedroom levels.

Another warning from JHS:

ATTEMPTING TO PLACE THE LITTLE BLACK AMP BOX BETWEEN THE POWER SECTION OF YOUR AMPLIFIER AND YOUR SPEAKERS WILL RESULT IN DAMAGE TO YOUR GEAR. PLACE IT IN A SERIES EFFECTS LOOP ONLY.