Positive Grid Spark 40 settings
Heart-Shaped Box settings for Positive Grid Spark 40
Nirvana · adapted 3 times on ToneAdapt
To get the Nirvana "Heart-Shaped Box" riff tone on a Positive Grid Spark 40, set Gain 6.5, Master 5, Bass 5, Mid 7, Treble 6, Reverb 0.5. Use the bridge pickup with your guitar's tone on 7-8 and volume on 8-9.
Riff settings
Adapted for a Epiphone SG Tribute · updated 2026-10-27
- Pickup
- Bridge pickup
- Guitar knobs
- Tone 7-8 · Volume 8-9
Positive Grid Spark 40 knobs
- Gain
- 6.5
- Master
- 5
- Bass
- 5
- Mid
- 7
- Treble
- 6
- Reverb
- 0.5
- Mod
- 0
Built-in effects
- Reverb on · 0.5
Playing tips
- Use your amp's built-in reverb set to a low level to recreate the spacious feel of the original tone.
- Focus on tight palm-muted chugs to capture the aggressive attack of the riff.
- Experiment with dynamic picking to achieve the gritty edge of breakup characteristic.
The original rig
What Nirvana used on the recording, for reference. ToneAdapt translates this to the controls your Positive Grid Spark 40 actually has.
- Guitar
- Fender Jaguar (early 1960s, modified with DiMarzio Super Distortion bridge pickup and black Seymour Duncan Hot Rails neck pickup)
- Amp
- Fender Twin Reverb (Silverface, late 1970s)
- Gain
- 6.5
- Bass
- 6
- Mid
- 7
- Treble
- 6
- Presence
- 5
- Reverb
- 2
Different guitar or pedals? Get Heart-Shaped Box adapted to your exact rig
These settings were generated for the gear named above. ToneAdapt adapts Nirvana's tone to your own guitar, pickups, amp and pedals in seconds.
Frequently asked questions
What are the best Positive Grid Spark 40 settings for Heart-Shaped Box?
Set Gain 6.5, Master 5, Bass 5, Mid 7, Treble 6, Reverb 0.5.
Which pickup should I use for Heart-Shaped Box?
Bridge pickup, with the guitar's tone at 7-8 and volume at 8-9.
What gear did Nirvana use on Heart-Shaped Box?
Guitar: Fender Jaguar (early 1960s, modified with DiMarzio Super Distortion bridge pickup and black Seymour Duncan Hot Rails neck pickup). Amp: Fender Twin Reverb (Silverface, late 1970s).
Will these settings work with my guitar?
These settings were adapted for a Epiphone SG Tribute. Different pickups change how much gain and treble you need. ToneAdapt adapts the tone to your exact guitar, pickups, amp and pedals.
Heart-Shaped Box on other amps
- Heart-Shaped Box on Fender Mustang LT25 · 165
- Heart-Shaped Box on Fender Frontman 10G · 67
- Heart-Shaped Box on Boss Katana · 62
- Heart-Shaped Box on Fender Champion 20 · 30
- Heart-Shaped Box on Line 6 Helix Floor / LT / Rack · 20
- Heart-Shaped Box on Fender Frontman 20G · 19
- Heart-Shaped Box on Fender Frontman 15G · 18
- Heart-Shaped Box on Orange Crush 12 · 17
Popular songs on the Positive Grid Spark 40
- Master of Puppets · Metallica
- Walk · Pantera
- Enter Sandman · Metallica
- Sweet Child O' Mine · Guns N' Roses
- Hotel California · Eagles
- Whole Lotta Love · Led Zeppelin
- Crazy Train · Ozzy Osbourne
- Welcome to the Jungle · Guns N' Roses
- Iron Man · Black Sabbath
- Raining Blood · Slayer
- Stairway to Heaven · Led Zeppelin
- Back in Black · AC/DC
Settings are generated by ToneAdapt's tone adaptation for the gear named on this page and are a starting point — every amp, guitar and room is a little different.