Repentless amp settings — Harley Benton HB-20mfx

The Slayer guitar tone for “Repentless”, dialed in for a Harley Benton HB-20mfx with a Harley Benton R-466. Studio version, Repentless album (2015)

Original rig

Marshall JCM800 2203KK Kerry King Signature + Mode Four cabs, Boss 10-band EQ (mid-boosted), BC Rich with EMG 81/85 active pickups

Aggressive mid-forward thrash with tight low end, cutting presence, and dry attack — NOT scooped

Amp settings — Harley Benton HB-20mfx

CHANNELOD/Distortion channel

Knob	Setting (0–10)
Gain	8
Bass	4
Mid	9
Treble	6
Presence	7
Reverb	0
Master	6

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01Boss GE-7 Equalizer (or similar graphic EQ)

RECOMMENDED — not currently owned. This is the critical element of Kerry King's tone. The 'upside-down V' shape boosts mids while keeping lows and highs neutral. Without this pedal, push amp mids to maximum and accept a less saturated front-end.

100Hz 4 · 200Hz 5 · 400Hz 7 · 800Hz 9 · 1.6kHz 8 · 3.2kHz 6 · 6.4kHz 4 · Level 7

Why these settings

The HB-20mfx is a small solid-state practice amp with limited gain saturation compared to Kerry's cranked 2203KK. Compensate by maxing the mid control at 9 (Kerry runs mids at 8 on his Marshall but uses an external EQ to push them further — you lack that pedal, so the amp must do all the work). Bass stays conservative at 4 to avoid flub on a small speaker. Your R-466 has passive humbuckers vs Kerry's hot EMGs, so gain goes to 8 instead of his 6-7 to achieve similar saturation.

PRO TIPKerry's pick attack is critical — use a thick pick (1.0mm+), strike the strings hard and close to the bridge, and palm-mute aggressively on the low strings. The tone is defined by percussive muted chugs, not sustain. If your amp has a noise gate or you can add one, engage it — Slayer's studio tone is dead silent between riffs.

Get this tone on your amp

These settings are for a Harley Benton HB-20mfx. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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Song, artist and gear names are used to identify the tone being matched; ToneAdapt is not affiliated with or endorsed by the artists or manufacturers mentioned. Settings are AI-generated starting points — trust your ears.