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Mad Professor
Mad Professor Little Green Wonder Handwired Overdrive Pedal
The first ever Mad Professor pedal is back and better than ever!
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Want to Click and Collect or try items at our Guildford Store?
The store is open 10am - 6pm Monday to Saturday and 11am - 5pm Sunday and bank holidays.
The stock information shows the quantity of units that are available to purchase at the Guildford store and the quantity of units that are available at our off-site Guildford warehouse. These stock levels are updated in real time.
Our Click and Collect service is available at our Guildford store from 10am - 6pm Monday to Saturday, and 11am - 5pm on Sunday. You can either choose Click and Collect as your delivery option online or, during store opening hours, call our sales team on 01483 456777 for assistance with placing your order.
If you have placed your order online, you will receive a confirmation email of your order and a separate follow-up text or email to confirm when your item is ready for collection.
Please do not come to the store before you have received the follow-up message, as your order may not yet be ready at the store.
If the only available stock is in our off-site warehouse it can be brought to the store location for you to try - you just need to contact the store within opening hours. Please note any requests received after 3.30pm will not arrive at the store until the following morning.
Please be aware that stock availability can change quickly both online and in-store, so we would always recommend placing your Click and Collect order as soon as possible to reserve your item.
SKU: LGWHW
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Product Description
After two decades of earning its stripes, the legendary Mad Professor Little Green Wonder is back — and it’s landed in the upgraded Handwired Series. This is the same beloved overdrive that players have relied on for years, now refined with premium construction and attention to detail that truly does it justice.
Dialled-in drive for any rig
The Little Green Wonder is all about clarity, control and versatility. With its high headroom design and carefully tuned EQ curve, it delivers a focused, natural overdrive that enhances your guitar’s character rather than masking it.
The clever Body control lets you perfectly match the pedal to single-coils or humbuckers, so you’re always sitting in the sweet spot. It has a wide range of gain, so you can use it on its own, stack it with your favourite pedals or run it as a punchy boost for your amp.
Handwired quality, built to last
This latest version sticks to the original, tried-and-tested circuit but levels things up with proper handwired craftsmanship. You’re getting top-notch through-hole components, reliable Alpha pots and switches, plus rugged Switchcraft jacks — all tucked into a durable metal enclosure with handy top-mounted connections. Every pedal is handmade in Finland, giving you that boutique quality feel straight out of the box.
Features
- Volume: Set the overall output level of the pedal.
- Drive: Controls the amount of saturation, sustain and harmonic content.
- Body: Adjusts the frequency of the overdrive. Turn counter-clockwise for more bass and low mids with a slight treble boost. Turn clockwise to get a more mid-focused tone with less bass.
Specifications
- Power requirements: 2.1 mm plug centre negative and positive sleeve
- Current draw: 4 mA at 9V
- Input impedance: 500K
- Output impedance: 50K
- Voltage supply range: 7.5-18V
- True bypass: Yes
- Country of manufacture: Finland
Related Categories
Brands, Guitar Pedals, Utility, Mad Professor Amplification, Overdrive and Distortion Pedals