Mechanix amp settings — Marshall MG30CFX

The Megadeth guitar tone for “Mechanix”, dialed in for a Marshall MG30CFX with a Psd Super stratocaster. Studio version, Killing Is My Business... and Business Is Good! (1985)

Original rig

B.C. Rich Bich (Seymour Duncan / Bill Lawrence L500L humbuckers) into MXR Distortion+ boosting a cranked Marshall JCM800 2203

Aggressive, raw, bite-heavy 80s thrash metal rhythm

Amp settings — Marshall MG30CFX

CHANNELCleanBOOSToff

Knob	Setting (0–10)
Gain	2
Bass	6
Mid	6
Treble	7
Reverb	0
Master	5

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01Behringer UM300 Ultra Metal

Gain source (run direct into amp input)

Dist 7 · High 7 · Low 6 · Mid 5 · Mid Freq 6 · Level 7

Why these settings

The UM300 serves as the primary high-gain engine to replicate the aggressive JCM800 and distortion pedal clipping, requiring the MG30CFX to sit on its cleanest channel with amp gain dialed down to 2 to prevent muddy double-gain stacking. The amp's mid and treble are set to provide cutting Marshall bite without harshness, while presence is omitted because the MG30CFX panel lacks that control. On the UM300, keeping Mid Freq around 1-2 o'clock (6) focuses the mid punch around the signature upper-mid thrash attack.

PRO TIPUse tight, aggressive palm muting right against the bridge saddles with a stiff pick (1.0mm+) to nail Mustaine's fast alternate-picked downstroke-heavy attack.

Get this tone on your amp

These settings are for a Marshall MG30CFX. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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