J.Rockett Audio Designs Hot Rubber Monkey V2 Overdrive

An "HRM" Overdrive: The Dumble Spirit, J.Rockett Style

The Blue Hot Rubber Monkey V2 (HRM V2) was designed to capture the DNA of the overdrive tones from a Dumble-style amp equipped with the HRM modification. This EQ approach emphasizes a guttural low-midrange, where the guitar gains density, singing quality, and authority. To refine the V2, the J.Rockett Audio Designs team spent two years working closely with a genuine HRM-modified amp to analyze its nuances and deliver a version even closer in feel and response.

For Which Guitarists and Styles?

The Blue HRM V2 targets guitarists seeking a high-end overdrive capable of delivering anything from smooth, creamy grit to a more pronounced drive while maintaining excellent definition. It excels in blues, rock, rock fusion, and all genres where you want a tone that "speaks" under your fingers, with notes that hold together and a strong presence in a busy mix.

On a pedalboard, it works equally well as the main overdrive in front of an already slightly driven amp or as a character pedal to add harmonic signature to a clean channel. In the studio, its ability to place the guitar perfectly in the spectrum helps record parts that remain clear without pushing the volume.

Controls and Settings: An EQ Designed for the Mix

The pedal offers straightforward handling with four controls: Level (output volume), Gain (saturation amount), Top End, and Midrange. The Top End knob adjusts the bite and brightness of the high frequencies, ideal for bringing out pick attack or taming a too-snappy guitar, while preserving the typical HRM low-mid foundation.

The Midrange control is the heart of the concept: it adjusts this crucial guitar midrange and allows thickening of the low-midrange to achieve a broader, more singing, and more present texture. A welcome bonus: by happy coincidence, the Blue HRM V2 can also venture into very high-level Tube Screamer -style tones, with an extended tone control to tailor the mid hump and clarity.

The Sound

The Blue Hot Rubber Monkey V2 stands out with a creamy, dense, and very musical drive, with dynamics that follow the right hand: you can easily go from delicate crunch to more aggressive saturation by adjusting pick attack and guitar volume. Even at moderate gain, the pedal retains an amp-like feel, with the ability to sing and feedback naturally, as if the sound "comes alive" in the room.

Its coloration remains centered on the robust HRM low-midrange: perfect for thickening a single coil, adding body to a semi-hollow, or making a guitar cut through in a live context. The result is an expressive, articulate overdrive crafted for those who want a premium tone that cuts through without becoming harsh.

Technical specifications

Effects	Overdrive	Type	sector
Technology	Analog	Use	electric guitar
Format	Pedal	Color	Black
EQ	2 channels

Controls	Level, Gain	Dimensions	10.2 x 5.7 x 3.2 cm
Top End	high-frequency bite adjustment	Weight	0.45 kg
Midrange	midrange adjustment and low-mid thickening	Included Accessories	documentation
Enclosure Material	steel	Power Supply	9 V DC
Components	NOS	Power Consumption	30 mA
Manufacturing	hand-built in California, USA