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JHS Pedals Little Black Amp Box Passive Attenuator

Volume utility device that lets you enjoy cranked amp tones at a safe level!



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Product Description

Be the master of your big valve amp. The JHS Pedals Little Black Box lets you tap into your saturated tube tone at a fraction of the volume you'd usually need. Without the help of the Little Black Box, you'd have to crank your amp's volume to force a natural-sounding gain. 

Simply put the Little Black Box in your amp's series effects loop and turn the single volume dial to your liking. This adjusts the amount of signal sent to your amp's power section. Your neighbours and family will really appreciate what the Little Black Box can do! 

Thanks to its tiny profile, you can squeeze the Little Black Box into any setup. Be it sitting on top of the amp or in a pedalboard, its rugged build is capable of taking anything you throw at it.

Key Features

  • Run it in your effects loop to turn down a turned-up amp
  • Retain the response and tone of your amp’s sweet spot at lower levels
  • High-grade components keep your tone clear and pure
  • Passive design doesn’t require any power
  • Can easily be mounted underneath your board

Please Note: Attempting to place the Little Black Amp Box between the power section of your amp and your speakers will result in damage to your gear. Place it in a series FX loop only. Do not use with a parallel FX loop, it will not produce the intended effect.

Cian Hodge author picture

Written by Cian Hodge

JHS Pedals
Power Source
Pedal Type

Customer Reviews


35 reviews





Trusted Customer20th Jun 2023

Mr Tom Norcliffe1st May 2023

Does what I need for quieter home playing. There’s a balance between amp volume an and JHS box volume that avoids loss of tone

Value 4Looks 5Durability 4Sound 4

Trusted Customer17th May 2022

Didn't work as described. Put in the effects loop of an Marshall Origin 20. When amp is cranked I got no breakup what so ever. Yes, the tone was better, but certainly not what I was hoping for.

Value 1Looks 4Durability 4Sound 2

Trusted Customer13th May 2022

Great product that solves an old problem. Not the cheapest of it's type, but JHS products are always excellent.

Value 4Looks 4Durability 5Sound 5

Trusted Customer31st Mar 2022

Does exactly what I need it to. Though I only get a usable volume for my environment in a tiny portion of the potentiometer's sweep. I suspect that the reason for this is because I'm using a 5 watt amp, but it's a little tricky to gauge.

Value 4Looks 5Durability 5Sound 5

Mr Bryan Keegan18th Jan 2022

The JHS Pedals Little Black Amp Box attenuator is an absolute waste of money . . .kills your tone

Value 1Looks 3Durability 3Sound 1

Mr Jarkko Paaso18th Dec 2021

Value 5Looks 4Durability 4Sound 5

Mr G.K. Jones28th Oct 2021

Does exactly what it’s designed I got cranked tube amp a bedroom volume

Value 5Looks 5Durability 5Sound 5

Trusted Customer20th Jul 2021

Great solution for high power amps with fx loop, try it!

Looks 5Sound 5

Mr samuel spiteri-nobbs16th Jun 2021

Good item except you have to run it around 11 oclock to get any bass end. This is still a decent volume but was hoping for the same sound throught the sweep of the pot. Also at full volume the amp without the black box is a lot louder so you cant leave it plugged in all the time if you want yo use it in that way.

Value 4Looks 5Durability 5Sound 5

Finance available at checkout for orders £300+

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It's simple! Just add the products you want to your basket and click the "Checkout" button in your basket. Go through the checkout process and tick the "Finance" option under "Select Your Payment Method". You can then choose which finance term you'd like to apply for, and change your deposit if you wish.

At the end of the checkout you'll be taken to the V12 Finance web site. This is where your finance application is processed. Assuming your application is accepted you'll be able to place your deposit and confirm your order right there.

Then, your order will come through to Andertons and we'll send you the goods. Get approval before 3pm and we'll send your order out the same working day (stock permitting) for next working day delivery!

Who can apply for finance?

You must: spend over £300, be at least 18 years of age, have been a UK resident for 3 years or more, be able to make repayments by Direct Debit, be in regular employment (minimum of 16 hours per week) including self-employment, or in permanent residence with your partner who is in regular employment.

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.