MXR Custom Badass '78 Distortion Settings Guide
The MXR Custom Badass '78 Distortion is a four-knob distortion pedal modelled after the high-gain sounds of 1978 — the height of the Van Halen era. It features an Output, Gain, Tone, and a unique Crunch control that acts as a variable low-frequency response adjustment, tightening or loosening the bass character of the distortion. The '78 Distortion covers classic 70s-style overdrive through high-gain distortion and has become a popular recommendation for hard rock and early metal tones at a mid-range price point.
The best MXR Custom Badass '78 Distortion settings start with: Output at 5/10, Gain at 6/10, Crunch at 5/10, Tone at 5/10. Adjust from there based on your amp, guitar, and room volume. For Hard Rock: Output 6/10, Gain 6/10, Crunch 4/10, Tone 6/10.
⚡ Start Here — Recommended Settings
| Control | Starting Position | Range |
|---|---|---|
| Output | 5/10 | Silent → Loud |
| Gain | 6/10 | Light → Maximum |
| Crunch | 5/10 | Tight → Loose |
| Tone | 5/10 | Dark → Bright |
These are universal starting points. Adjust based on your amp, guitar, and room. Scroll down for genre-specific settings and artist-documented positions.
What Each Control Does
Recommended Starting Settings
Safe starting positions for any style. Adjust from here based on your amp and room.
All values on a 0–10 scale. These are starting points — fine-tune by ear.
Settings by Genre
Crunch at 4 (slightly tight) with Gain 6 produces the tight, punchy character that defines 70s-80s hard rock. The low Crunch setting keeps the palm-muted riffs focused and prevents the low end from becoming flabby at high gain. Tone at 6 adds the upper-mid presence needed to cut through the mix.
Moderate Gain with Crunch at 6 (slightly loose) produces a warmer, more vintage character. Looser low end sounds more organic and amp-like. This setting approximates the type of distortion heard on 1978-era recordings — Marshall-style crunch with vintage warmth.
Low Gain with loose Crunch (7) produces a natural, warm overdrive character. At low Gain settings, the '78 Distortion acts more as a hot overdrive than a true distortion — the Crunch at 7 adds fullness and warmth. A good substitute for a tube overdrive at low Gain.
Full Gain with very tight Crunch (3) for modern metal. Maximum tightness in the low end at high gain keeps palm mutes defined and prevents the bass frequencies from turning into a low-end wall of mud. Tone at 7 adds the high-frequency cut-through.
Tips & Common Mistakes
- The Crunch control is the '78 Distortion's most distinctive feature. Set it low for tight, focused low end with high gain; set it high for a warm, vintage-amp-style low end at lower gain.
- The '78 Distortion stacks well with a transparent boost in front — a clean buffer or clean boost pedal (TC Electronic Spark Mini, MXR Micro Amp) pushing the '78 adds body and harmonic richness.
- At low Gain settings with Crunch high, the '78 behaves like a character-adding OD rather than a distortion pedal. This application is less documented but highly useful.
- Tone at maximum can be quite bright with some guitar/amp combinations. Start at 5 and adjust — the '78's Tone control is slightly more aggressive than on comparable pedals.
FAQ
MXR Custom Badass '78 Distortion — Common Questions
Best starting settings for MXR Custom Badass '78 Distortion: Output at 5/10, Gain at 6/10, Crunch at 5/10, Tone at 5/10. Adjust from there based on your guitar, room, and playing style.
For Hard Rock: Output 6/10, Gain 6/10, Crunch 4/10, Tone 6/10. Crunch at 4 (slightly tight) with Gain 6 produces the tight, punchy character that defines 70s-80s hard rock. The low Crunch setting keeps the palm-muted riffs focused and prevents the low end from becoming flabby at high gain. Tone at 6 adds the upper-mid presence needed to cut through the mix.
For Classic Rock: Output 5/10, Gain 5/10, Crunch 6/10, Tone 5/10. Moderate Gain with Crunch at 6 (slightly loose) produces a warmer, more vintage character. Looser low end sounds more organic and amp-like. This setting approximates the type of distortion heard on 1978-era recordings — Marshall-style crunch with vintage warmth.
Output: Master output level. (Silent to Loud). Gain: Input gain — full range from edge-of-breakup to heavy saturation. (Light to Maximum). Crunch: Low-frequency response of the distortion circuit. Low Crunch = tight, focused bass response; high Crunch = looser, fuller low end. This is the pedal's most distinctive control. (Tight to Loose). Tone: High-frequency content of the distortion output. (Dark to Bright)
The Crunch control is the '78 Distortion's most distinctive feature. Set it low for tight, focused low end with high gain; set it high for a warm, vintage-amp-style low end at lower gain. The '78 Distortion stacks well with a transparent boost in front — a clean buffer or clean boost pedal (TC Electronic Spark Mini, MXR Micro Amp) pushing the '78 adds body and harmonic richness. At low Gain settings with Crunch high, the '78 behaves like a character-adding OD rather than a distortion pedal. This application is less documented but highly useful. Tone at maximum can be quite bright with some guitar/amp combinations. Start at 5 and adjust — the '78's Tone control is slightly more aggressive than on comparable pedals.
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