
MXR Thump Bass Preamp
The MXR Thump Bass Preamp is a tone-sweetening, signal-boosting, and altogether groove-enhancing machine. This pedal was conceived when the MXR design team and our in-house bass players discovered that the Echoplex® Preamp’s sonic secret sauce made for just as delectable a pairing with bass as it does with guitar. Using that circuitry as a foundation, the MXR team added a simple yet potent tone-shaping interface so that you can dial in the perfect bass sound for the stage and the studio.
Crafting the sound you need is easy. The Echoplex Preamp circuit conditions your signal with a carefully balanced EQ profile, and this pedal’s tone controls let you take it from there. The Treble and Bass knobs cut or boost frequencies at 4 kHz and 40 Hz respectively, while the Mid knob cuts or boosts the midrange as set by the Frequency knob, from 250 Hz to 1 kHz. This range of frequencies was selected to give players maximum flexibility and minimal fuss when refining their bass signal.
Whether you need to punch up a solo, boost your signal in a live mix, or sculpt more edge into the sound of a passive bass, the Thump Bass Preamp packs incredible versatility into an MXR mini housing.

MXR Thump Bass Preamp
Purchase Information
Please read our FAQs page to find out more.
Refund/returning items
We do not accept order changes after the confirmation and payment of your order. After your product is delivered, Refunds are only possible if it is caused by our error (damaged/defective product, or incorrect item, etc.). To help us ascertain if your refund request is possible, please provide us with specific reasons for your refund request (reasons supported with photos where possible) via email to: enquiry@davisguitar.com – Please include your address too.
If the refund/return is approved, we shall provide you with an address for you to post the items you wish to return to. Please have the items in proper packaging and mail it back to the address we provide strictly within 2 days from receiving your items. The length of time your Refund in transit is beyond our control, your bank or credit card company may require additional period of time to process your refund and for the refund to be reflected in your account.
Shipping partners
- GrabExpress/LalaMove (Singapore only, same day delivery)
- FedEx Priority (International Orders)
Delivery typically in 1 to 3 business days to select markets in Asia, 3 to 5 business days to United States, Canada and Europe.
Taxes & Duties
The payment of duties and taxes are typically the responsibility of the receiver (International Deliveries).
Overseas shipping time and cost
Overseas shipping cost varies by buyer location and the item’s size and weight. Kindly contact enquiry@davisguitar.com for a shipping quote prior making a purchase.





