Jhs Pedals Little Black Amp Box
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Jhs Pedals
https://www.rosselectronics.com
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A "volume box" designed to tame a tube amp
The Little Black Amp Box is neither a distortion nor a traditional power attenuator: it is a volume utility designed to operate at the line level of the effects loop. The idea is highly effective: you let your preamp work as you like (tone, natural compression, attack), then you reduce the level sent to the power section to regain the feel of an "open" amp at a more reasonable volume. Within the JHS range, this is typically the kind of discreet tool that becomes indispensable as soon as you play on an expressive amp that's hard to keep under control at home or in the studio.
Who is it for, for which styles, and in what contexts?
This pedal is aimed at guitarists who want to drive the preamp (or simply push it) without turning the room into a concert hall. It is ideal for home studios, apartments, rehearsals, or on stage when you need to respect a set volume while keeping a lively sound under your fingers.
Regarding styles, it delights blues, rock, hard rock, and metal tones whenever your main character comes from the amp. If you also like clean "edge of breakup" sounds, it helps precisely dial in the level to maintain that balance point between clean and crunch, without relying solely on the guitar's volume knob.
Technical specifications
| Effects | Volume | Type | sector |
| Technology | Analog | Use | electric guitar |
| Format | Pedal | Color | Black |
Questions frequently asked
Does the Little Black Amp Box work with a series effects loop?
The connection is made within a series loop: amp Send output to the 6.35 mm mono jack input, then pedal output to the Return. Its single knob reduces the level sent to the power section.
Can this pedal be used in a parallel effects loop or between amp and speaker cabinet?
A parallel loop is not suitable because the dry/wet mix alters the behavior of the volume control. Placement between the speaker output and cabinet is excluded. This pedal is neither a load box nor a conventional power attenuator.
Does the JHS Little Black Amp Box require power?
Its passive design requires no power supply and its consumption is 0 mA.
Does the pedal change the amp’s tone?
The adjustment aims for transparent operation at the line level of the effects loop. The preamp character, including attack and natural compression, is preserved while the final volume is reduced.
What are the dimensions of the Little Black Amp Box?
The enclosure measures 110 x 40 x 50 mm and weighs 120 g. It is made in the USA.



