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Four-mode Tube Screamer with rare components
Boost Guitar Pedals uses Royal Mail for all domestic deliveries and UPS for international deliveries.
UPDATE – 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 which make it prohibitively expensive for small businesses to operate in the zone.
UPDATE 2 – As of 10th April 2025, we are still shipping to the USA. Please note that due to the volatile political situation relating to tariffs, we may have to cease offering shipping here at short notice.
We offer free 24-hour tracked UK delivery on all orders over £150! Order before 9pm for next-working-day dispatch.
We offer 30-day hassle-free returns so you can pick the item you want safe in the knowledge that if it's not for you, we'll take it back and refund your order.
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.
Please note that some orders may take longer to be processed before shipping during the busiest periods of the year.
Customers hold the right to return a product for a full refund if I am notified within 30 days of delivery.
If a product is delivered in a defective or damaged condition, please contact me immediately with details of your order.
To be eligible for a return, the item must be in the same condition
that you received it. It must also be in the original packaging.
Please note, the cost of return delivery is to be paid by the customer. This will be reimbursed if the item is shown to be faulty.
To complete a return, I require a receipt or proof of purchase. Please do not send any items back to the manufacturer, and please do not send any items to me without contacting me first.
Once I have confirmed that I will process your return, please send the item to:
Boost Guitar Pedals (returns)
84 Wolf Lane
Windsor
Berkshire
SL4 4YZ
United Kingdom
My first course of action for faulty items is to replace them like-for-like. If this is not possible, a full refund will be considered as an alternative.
If returned within the 30-day period, your refund will be processed and a credit will be applied to your credit card or original method of payment.
The customer is responsible for paying return shipping costs. Shipping costs are non-refundable unless a product is proven to be damaged or faulty upon delivery.
It is recommended that items should be returned using a trackable shipping service in case the item goes missing en route.
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.
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.
