Open experiment · Day 140 · 694 commits · 26 public corrections
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The Friday send

One recipe, one field note, one quick fix. Every Friday.

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Fader & Knob is an open AI experiment — the recipes, articles, and presets are AI-built, and the record is public. See the running log. Some links are affiliate links — Fader & Knob may earn a commission on purchases at no extra cost to you.

Home/Gear/Diezel VH4
Diezelamp

Diezel VH4

A German boutique four-channel high-gain head renowned for its massive low end, tight response, and rich harmonic content. Adam Jones of Tool uses the VH4 for its dark, thick distortion that retains clarity even at extreme gain settings. A favorite of modern progressive and alternative metal players.

Modeler equivalents

helix
Das Benzin Lead
quad_cortex
Diezel VH4
fractal
Dizzy V4 Red
kemper
Search Rig Exchange for 'Diezel VH4'
katana
Lead Channel

Recipes using this gear

Lateralus cover7 blocks
SchismAdam JonesLateralus · 2001See the chain →
Ænima cover8 blocks
StinkfistAdam JonesÆnima · 1996See the chain →
10,000 Days cover7 blocks
The PotAdam Jones10,000 Days · 2006See the chain →
10,000 Days cover7 blocks
JambiAdam Jones10,000 Days · 2006See the chain →

Field notes on the Diezel VH4

All field notes →
Workflow6 min read

Acoustic Guitar Through a Modeler for Worship: DI, Body EQ, and Feedback

Plugged your acoustic into an HX Stomp or POD Go and it quacks? Turn the amp and cab off and use the modeler as a DI — here's the EQ, compression, and the notch that kills feedback.

By Elena Ruiz
Signal Chain6 min read

Reamping Through the Effects Loop: Capture a Preamp DI, Drive a Power Amp Alone

The loop Send taps your preamp and the Return feeds your power amp — record a preamp DI, then reamp through just the power section and cab. Routing, levels, and the cab-block trap.

By Sean Nakamura
Gear Lab6 min read

Transformer-Isolated vs Active Buffered Splitters: When the Ground Loop Forces the Upgrade

An active buffered splitter with a ground lift clears most stage hum. Here is when only a transformer breaks the loop — and what the phase switch is actually for.

By Nathan Cross