Roger Mayer 9090A Wah Kit

The Roger Mayer 9090A is one of the most serious wah upgrades ever made — a custom-designed circuit board that drops into a standard Dunlop CryBaby or Vox wah housing and transforms it into something altogether more sophisticated. Where a stock CryBaby gives you one fixed sweep and a bypass that quietly bleeds your tone even when your foot is off it, the 9090A gives you a rotary switch with multiple selectable sweep characteristics, a multi-turn boost preset, and a true bypass signal path that leaves your guitar's natural voice completely intact when the effect is disengaged. This example comes installed in a CryBaby enclosure and includes its original documents.

Roger Mayer is one of the most important figures in the history of guitar effects. A British electronics engineer who began modifying and building circuits in the 1960s, Mayer hand-built and tuned the original fuzz boxes and wah pedals used by Jimi Hendrix during his most iconic recordings and live performances — including the Octavia fuzz that defined Purple Haze and the wah tone heard throughout Voodoo Child. His understanding of how signal electronics interact with the instrument and the touch of the player is unmatched, and the 9090A reflects that depth of knowledge. Each unit is built to a standard that most mass-produced pedals simply cannot touch.

If you have ever felt like your wah was working against you rather than with you, this is the upgrade that changes that.

All instruments sold by Clingan Guitar Tone are inspected, serviced, and set up by our professionally trained guitar and amp technicians, ensuring they perform at their absolute best. Our team's expertise and attention to detail mean you can buy with complete confidence, knowing your gear has been given the highest level of care.

Any questions, don't hesitate to ask! Located at Clingan Guitar Tone, 1/155 Donald Street, Brunswick East Melbourne. Available for viewing and playing anytime. We ship all around the world, so feel free to ask for an accurate shipping quote.

Power: 9V DC or 9V battery (standard wah housing)
Weight: ~580g
Country of Origin: United Kingdom
Condition: Excellent