Children of the Grave amp settings — Positive Grid Spark 40
The Black Sabbath guitar tone for “Children of the Grave”, dialed in for a Positive Grid Spark 40 with a Epiphone Les Paul Studio. Studio version, Master of Reality (1971) - main heavy riff
1964/65 Gibson SG Special 'Monkey' (P-90s) -> modded Dallas Arbiter Rangemaster Treble Booster -> Laney Supergroup LA 100 BL 100W Head into 4x12 cab
| Knob | Setting (0–10) |
|---|---|
| Gain | 7 |
| Bass | 5 |
| Mid | 7 |
| Treble | 7 |
| Reverb | 2 |
| Master | 7 |
01Onboard Treble Booster / Booster block
Engage the onboard Boost block in the Spark app directly before the amp model
The Spark 40 is a modeling amp, so we engage the onboard booster block to emulate Iommi's modified Rangemaster slamming a cranked British-voiced amp model without needing external pedals. Because your Les Paul Studio has humbuckers instead of Tony's brighter P-90s, keep the treble and mids pushed to 7 while trimming bass to 5 to keep the low C# chug from getting muddy. The Spark 40 faceplate lacks a dedicated presence knob, so upper-end bite is shaped entirely via the treble and booster controls.
Get this tone on your amp
These settings are for a Positive Grid Spark 40. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.
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