Tone library / Acdc / Back in black

Back in black amp settings — Unknown AGL-20

The Acdc guitar tone for “Back in black”, dialed in for a Unknown AGL-20 with a Squier Classic Vibe 60s Stratocaster. Studio version, Back in Black (1980) — main rhythm/riff tone

Original rig

1970/71 Gibson SG Standard (bridge humbucker) → Schaffer-Vega Diversity System (SVDS boost/comp) → cranked Marshall 1959 Super Lead 100W Plexi

Bright, biting British crunch with punchy midrange, dynamic touch sensitivity, and tight low-end crunch
Amp settings — Unknown AGL-20
CHANNELOverdrive / Drive channel (or Drive switch engaged)
GAIN 6 BASS 6 TREBLE 5 REVERB 0 MASTER 7
KnobSetting (0–10)
Gain6
Bass6
Treble5
Reverb0
Master7
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Guitar
PICKUPbridge TONE8 VOLUME10
Signal chain

01Marshall-style Overdrive / Plexi Drive (e.g. Marshall Bluesbreaker or Boss BD-2)

RECOMMENDED — not currently owned; adds authentic Marshall-style grit and compression to a practice amp

Drive 6 · Tone 5 · Level 7
Why these settings

The AGL-20 is an unrecognized compact practice amp, so only universal controls (gain, bass, treble, volume) are set while unverified knobs remain null. To compensate for the thin, bright single-coil bridge pickup of your Squier Strat compared to Angus Young's thick Gibson humbucker, keep bass at 6 and roll the guitar's bridge tone knob down to 8 to tame harsh high-end frequencies. Run the amp's drive channel at moderate gain (6) to deliver classic Marshall-style crunch without falling into modern oversaturation.

PRO TIPAngus Young gets his explosive crunch by hitting open chord voicings with heavy downward pick velocity right next to the bridge; dig in hard on the E, D, and A chords to induce natural acoustic snap and breakup.

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

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