The Electro-Harmonix Riddle Q Balls is an Electro-Harmonix wah pedal, currently around $155.13. Close alternatives include the Emma DiscomBOBulator and the Electro-Harmonix Q-Tron Plus. It pairs well with the Soldano SLO 100 100-Watt Tube Guitar Amplifier and the Park P50 Classic.
Electro-Harmonix Riddle Q Balls
Electro-Harmonix · pedal
The Electro-Harmonix Riddle is a Q-Balls style guitar envelope filter pedal from Electro-Harmonix, delivering pick-attack-responsive auto-wah filter sweeps with Q, Range, Mix, and Drive controls. The Riddle produces funky, dynamic filter sweeps that follow playing dynamics with adjustable Q resonance for sharp filter peaks and Drive for adding harmonic content. Operates in both guitar and bass frequency ranges via Range control.
- filter
- envelope filter
- resonance
- responsive
- drive
- auto wah
- peak
- pick attack
Price updated Aug 27, 2026
Genres the Electro-Harmonix Riddle Q Balls is commonly used in
- Funk
- Soul
- Experimental
cited
Inferred from shared tonal signals, not a stated genre tag. - Alternative
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Electro-Harmonix Riddle Q Balls
Soldano SLO 100 100-Watt Tube Guitar Amplifier
Soldano
10% matchSoldano SLO 100 100-Watt Tube Guitar Amplifier's own saturated character is the real reason this is worth trying
Park P50 Classic
Park
10% matchElectro-Harmonix Riddle Q Balls's dynamic character and Park P50 Classic's compressed voice sit in the same lane rather than fighting each other
Pedals that stack with the Electro-Harmonix Riddle Q Balls
Walrus Audio EB-10
Walrus Audio
8% matchWhat Electro-Harmonix Riddle Q Balls brings here leans toward dynamic — that's worth building a pairing around
Xotic RC Booster
Xotic
8% matchXotic RC Booster's own transparent character is the real reason this is worth trying
Keeley Halo
Keeley
5% matchRun Keeley Halo after Electro-Harmonix Riddle Q Balls in the signal chain, clear of Electro-Harmonix Riddle Q Balls's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Walrus Audio Fable
Walrus Audio
5% matchWalrus Audio Fable's full voice goes after Electro-Harmonix Riddle Q Balls in the signal chain — it's not there to compete with Electro-Harmonix Riddle Q Balls's own dynamic character — goes in the amp's FX loop (or last, into a clean amp)
Cheaper alternatives
Electro-Harmonix XO Micro Q-Tron
Electro-Harmonix
69% similarityShared character: extreme_settings, peak, sensitivity
FTelettronica Envelope Filter
Ftelettronica
68% similarityShared character: soul, sensitivity, natural_resonance
Electro-Harmonix Doctor Q
Electro-Harmonix
67% similarityShared character: soul, sensitivity, pick_attack
Fender Pour Over Envelope Filter
Fender
66% similarityShared character: soul, sensitivity, pick_attack
Electro-Harmonix Nano Q-Tron
Electro-Harmonix
97% similaritysimilar tone character
Electro-Harmonix Micro Q-Tron Envelope Filter
Electro-Harmonix
97% similaritysimilar tone character
Boutique & premium upgrades
Maxon AF-9 Auto Filter
Maxon
71% similarityShared character: soul, peak, sensitivity
Fairfield Circuitry Long Life
Fairfield Circuitry
67% similarityShared character: peak, natural_resonance, filter
Ashdown Type 23 Three Band Filter
Ashdown
96% similaritysimilar tone character
Death By Audio Deep Animation
Death By Audio
96% similaritysimilar tone character
Similar charactersee all similar tone character →
Emma DiscomBOBulator
pedal
73% similarityShared character: soul, sensitivity, pick_attack
Electro-Harmonix Q-Tron Plus
Electro-Harmonix
71% similarityShared character: peak, natural_resonance, filter
Musitronics Mu-Tron III
Musitronics
67% similarityShared character: pick_attack, filter
Carl Martin Ottawa Vintage Optical Envelope Auto-Wah/Envelope Filter
Carl Martin
97% similaritysimilar tone character
Carl Martin Ottawa
Carl Martin
97% similaritysimilar tone character
Vox V863CA Auto Wah
Vox
96% similaritysimilar tone character
See all alternatives to the Electro-Harmonix Riddle Q Balls (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Riddle Q Balls?+
The closest matches in character are the Emma DiscomBOBulator, the Electro-Harmonix Q-Tron Plus, the Musitronics Mu-Tron III. Budget picks: Electro-Harmonix XO Micro Q-Tron, FTelettronica Envelope Filter, Electro-Harmonix Doctor Q. Boutique upgrades: Maxon AF-9 Auto Filter, Fairfield Circuitry Long Life, Ashdown Type 23 Three Band Filter.
What pairs well with the Electro-Harmonix Riddle Q Balls?+
Strong matches from rig and tone-complementarity evidence: Soldano SLO 100 100-Watt Tube Guitar Amplifier, Park P50 Classic, Walrus Audio EB-10 — Soldano SLO 100 100-Watt Tube Guitar Amplifier's own saturated character is the real reason this is worth trying.
How much does the Electro-Harmonix Riddle Q Balls cost?+
Around $155.13 (live listing price, updated Aug 27, 2026).
Compare
- vs Electro-Harmonix Nano Q-Tron
- vs Electro-Harmonix Micro Q-Tron Envelope Filter
- vs Carl Martin Ottawa Vintage Optical Envelope Auto-Wah/Envelope Filter