Eruption amp settings — Sundown clone jr Sd-cj-35

The Van Halen guitar tone for “Eruption”, dialed in for a Sundown clone jr Sd-cj-35 with a EVH Striped Series. Studio recording, Van Halen (1978)

Original rig

1968 Marshall 1959 Super Lead 100W (cranked via Variac) + Frankenstrat (Gibson PAF bridge humbucker) + MXR Phase 90 + MXR 6-band EQ + Maestro Echoplex / Univox EC-80A

Classic Brown Sound — aggressive upper-mid bite, spongy low end, saturated harmonic sustain with slow phase sweep

Amp settings — Sundown clone jr Sd-cj-35

CHANNELRed / Lead ChannelBRIGHToffBOOSTon

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

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01MXR Phase 90

In front of amp input before preamp saturation

Speed 2

02Echoplex Tape Delay / EP-3 style delay

RECOMMENDED — not owned

Delay Time 3 · Repeats 3 · Mix 3

Why these settings

The Sundown SD-CJ-35 (Dennis Kager design) features high-gain cascaded preamp stages, so engage the Lead channel with boost to capture the Marshall Super Lead power-tube saturation without muddying the bottom end. Keep the mids pushed to 7 to deliver the aggressive upper-mid bite of the original MXR 6-band EQ boost. Setting the owned Phase 90 in front of the amp with Speed around 9 o'clock provides the signature subtle sweep across tapping sections.

PRO TIPPlace the Phase 90 before the amp's high-gain stage rather than in an effects loop; the preamp compression clamps down on the phase sweep peaks, producing the smooth, vocal swirl characteristic of the record.

Get this tone on your amp

These settings are for a Sundown clone jr Sd-cj-35. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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Eruption on other ampsSAME SONG, YOUR AMP Van Halen tonesALL SONGS EVH Striped Series tonesSAME GUITAR Tone libraryEVERYTHING

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.