JHS Little Black Amp Box Passive Amp Attenuator

No sales tax for US customers outside California.

The JHS Little Black Amp Box is a simple, effective passive attenuator designed to help players get the most out of their tube amplifiers at manageable volume levels. Intended for use in an amp’s effects loop, this compact pedal allows you to push your amp harder—achieving natural power-section saturation—while keeping overall output under control. There is no power required, no tone shaping circuitry, and no coloration added to your sound.

Housed in a rugged metal enclosure, the Little Black Amp Box features a single, smooth-turning volume control and high-quality components throughout. By placing it in the effects loop, it acts as a master volume, letting your preamp and power amp breathe without overwhelming stage or room volume. It’s an ideal solution for players using high-powered Fender, Marshall, Vox, or boutique tube amplifiers that sound best when pushed.

At Mahar’s Vintage Guitars, this pedal has been fully inspected and tested for proper operation. We buy, sell, and accept trades on vintage, modern, and boutique pedals and amplifiers. See it alongside our Fender Amplifiers Collection, Vintage Fender Guitars, and Sell or Trade Your Gear page.

Excerpts from real online end-user reviews of the JHS Little Black Box:
“Perfect solution for loud amps—simple and transparent.” – The Gear Page
“A must-have for amps with effects loops.” – Reddit r/Guitar
“No tone loss at all. Does exactly what it should.” – Harmony Central

Shipping policy:

Shipments will require signature on delivery, no exceptions.  If there is damage, the buyer must retain all packing materials intact and picture them immediately and send them to sales@maharsvintageguitars.com.  Less than 1% of our shipments are damaged in transit, and we are committed to making sure your item arrives safely, but we are taking these additional measures to make sure you are happy with your purchase.