- Basic Audio Pedals
- Bleak District Electric
- Drunk Beaver
- Dunn Effects
- Formula B
- Fredric Effects
- Greenhouse Effects
- Hungry Robot Pedals
- Jackson Audio
- Kink Guitar Pedals
- KMA Machines
- NE-Electronix
- Old Blood Noise Endeavors
- Practical Patch
- Raygun FX
- Red Noise Pedals
- Signal Cheyne
- SolidGoldFX
- Stompnorth Pedals
- Stringjoy
- Tate FX
- Walrus Audio
- Whimsy Machines
- Zander Circuitry Pedals
- Classic Gear: Ibanez Tube Screamer
- Classic Gear: Klon Centaur
- How To Get A Crushing Doom Metal Tone
- Guitar Effects Pedal Buying Guide: What Do I Need?
- Guitar Pedal Buying Guide: Genre by Genre
- Guitar Pedal Brands UK: The Map
- The Boss Heavy Metal HM-2: New Lease of Life
- Parts Shortages in the Guitar Pedal Industry
- Digital vs Analogue Guitar Pedals
- Recording with Guitar Pedals: 101
- How To Use Guitar Delay
- Guitar Playing at Home: How to Get the Best Sound
- Guitar Cable: Your Tonal Foundation?
- What Are Clipping Diodes?
- What is the Four Cable Method?
- What Is A Boutique Guitar Pedal?
- Valves in Guitar Pedals
- The Dallas Rangemaster Treble Booster
- What is Pedal Stacking?
- What is a true bypass pedal?
- Guitar Pedal Terms Explained: A-Z
- How Musicians Can Make Money
- How To Start a Guitar Pedal Company
- James Hetfield's Gear on Master of Puppets (1986)
- Noel Gallagher's Guitar Gear on (What's the Story) Morning Glory?
- Jerry Cantrell's Guitar Gear on Dirt (1992)
- Tony Iommi's Guitar Gear on Black Sabbath Vol. 4
- Jimi Hendrix's Guitar Gear: Woodstock 1969
- Brian May's Guitar Gear: A Night At The Opera
- Slash's Guitar Gear on Appetite For Destruction
- Jack White's Guitar Gear: Elephant
Popular Articles
New!
Exclusive!
FORMULA B That Screamer Overdrive Pro 4558
Four-mode Tube Screamer with rare components
£179.99
✓ Free UK delivery!
International Delivery
As of 13th December 2024, we are regrettably no longer able to ship to customers located within the EU or Northern Ireland, due to new GPSR regulations.
International shipping costs will be calculated and displayed during the checkout process. You can also find them here.
International deliveries are subject to additional import duties and VAT at your local rate. These charges are payable to the courier at time of delivery. Calculate how much you will need to pay here.
About the FORMULA B That Screamer Overdrive Pro 4558
The Formula B That Screamer Overdrive Pro 4558 is the Italian pedal builder's latest overdrive, based on the beloved Tube Screamer. Using two internal dip switches, select from TS808, TS9, TS10, or combined TS808 & TS10 modes.
From classic crunch with a pronounced midrange, to the glassy tones of Stevie Ray Vaughan and low-gain boost of John Mayer, with the TS4558 you get the sound of three highly renowned Tube Screamers packed into one box.
That Screamer Overdrive Pro 4558 is based on the thorough studies of the circuitry of three vintage pedals: a TS808 from 1981, a TS9 from 1982, and a TS10 from 1986. The result is a masterclass in dynamics, with an additional +5dB in volume compared to the originals.
The drive circuit consists of the original JRC4558D (Japan Radio Company) op-amp, paired with Tantalum capacitors for the tone section and bipolar electrolytic capacitors in the buffer section. The very rare MA150 made-in-Japan diode takes care of clipping.
To make the pedal perfectly suited to the modern player, That Screamer is true bypass.
That Screamer Overdrive Pro 4558 Controls
Drive Adjusts the amount of overdrive.
Tone Adjusts the tone of the pedal. Turned clockwise is brighter; counterclockwise is darker.
Level Adjusts the output volume.
Mode To change modes, unscrew the four screws located on the back to access the dipswitches that allow you to adjust the sound to your preference.
That Screamer Overdrive Pro 4558 Demos
That Screamer Overdrive Pro 4558 Features
- Multi-mode Tube Screamer
- Based on the circuitry of 3 vintage pedals
- Original JRC4558D op-amp
- Drive, Level & Tone controls, plus internal Mode dipswitches
- Handmade in Todi, Italy
- Dimensions: 121mm x 66mm x 40mm
- Power: 9V power adaptor, centre-negative (not included)
- Current draw: 10mA