Buying Guides
Upgraded Tubescreamer with Sought-After Chip
✓ In stock
Order before 9pm UK time for next-day dispatch!
✓ Free UK delivery!
Royal Mail 24-hour shipping as standard.
✓ 30-day hassle-free returns
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 4558 OD is owner Marco Bovelli's take on a TS808 Tubescreamer - one of rock's most iconic pedals - an original will set you back many hundreds of pounds today!
Featuring the same Texas Instruments RC4558P chip found in some of the earliest examples of the TS808, the 4558 OD sounds absolutely incredible. If you've never done the whole Tubescreamer-Marshall thing then you're missing out big time!
Yes, this is the new, slightly updated version of the Formula B 4558 OD for 2023, with a tweaked EQ to reduce the amount of treble, and a significant volume boost. Oh, and that awesome minimalist design!
The TS808 has been used on a huge number of rock records, with fans including Rory Gallagher, Stevie Ray Vaughan, Eric Johnson, Joe Bonamassa, Gary Moore, Andy Timmons, John Mayer and Jerry Cantrell.
It's renowned for its unique overdrive character achieved by symmetrical clipping, low-end cut and mid-frequency EQ bump. This gives a rich, gritty, crunchy sound that can cut through the mix.
The Formula B 4558 OD features a couple of improvements over the original Tubescreamer with the modern player in mind.
Firstly, it's capable of delivering more volume than an original Tubescreamer and cleans up better when the Gain control is set to 0, making it a great clean boost. But crank it up into typical Tubescreamer gain territory and the 4558 OD produces a harmonically rich distortion with a three-dimensional quality and a hint of grit.
Additionally, a toggle switch allows you to add in more bass to what is traditionally a mid-range focused sound.
