Velcro on bottom of unit

Vertex Ultraphonix HRM Overdrive
The Ultraphonix HRM is Vertex’s take on the “Hot Rubber Monkey” style inspired overdrive circuit—tighter, more mid-focused, and more aggressive than the standard Ultra Phonix. It delivers a punchy, harmonically complex drive with fast attack, controlled low end, and a focused upper-mid voice that cuts through dense mixes. Designed for players who want boutique amp-style saturation with added bite and articulation.

Key Features

• HRM-Voiced Gain Structure
  Provides a more compressed, mid-forward response than the standard Ultra Phonix, ideal for articulate lead work and tight rhythm playing.
• Touch-Sensitive Dynamics
  Cleans up smoothly with lighter picking or guitar volume roll-off, maintaining clarity and harmonic detail across gain levels.
• Focused Midrange Presence
  Emulates the internal HRM EQ stack found in certain D-style amps, giving notes a vocal, cutting quality without harshness.
• Versatile Tone Control
  Single tone knob adjusts overall brightness and contour, making it easy to match different guitars, amps, and stage volumes.
• High-Headroom Output
  Level control offers enough push to drive tube amps or sit cleanly in front of modelers, maintaining definition at higher volumes