Vic’s Bridge & Slap Blender
Quick Start: We recommend starting with your amp at a moderate volume and all preamp knobs (Gain and EQ) at 12 o’clock. At this position, the unit outputs a safe signal level with approximately 6dB of attenuation on the mid knobs. Adjust the Red (Bridge) and Black (Slap) knobs first to set your output blend, then use the switches and EQ knobs to find the specific frequency control and tone you like.
Tone & Feedback Control: This dual-channel preamp provides a clean, buffered signal via a TL072 preamp circuit. Its features are designed to manage feedback and to condition the signal of two separate pickups before hitting your bass amplifier.
Red Bridge Knob: Controls the master output gain for the bridge wing channel on the top of the unit.
Black Slap Knob: Controls the "click" and percussive elements from your under-the-fingerboard pickup. As you increase this knob clockwise, more 5kHz frequency and higher is introduced into the blend.
Polarity Switch: An instant feedback killer for loud stages; it changes how the bridge pickup reacts to speaker sound waves.
70Hz High Pass Filter: A switch to cut out stage rumble and low-end boom.
Low Mid Knob (350Hz): Turning this clockwise reduces the "congested" or "boxy" frequencies that often cause low-end groaning.
High Mid Knob (1.5kHz): Reduces the "clacky" or "brittle" sound common with piezo pickups.
Note: The EQ knobs, Polarity switch, and HPF only affect the Bridge channel. The Slap channel is fixed in its upper frequency range to preserve the "click" and is not affected by these controls.
Connectivity & Versatility:
Input: Features two 1/4” inputs for Bridge Wing and Neck Slap pickups. While optimized for Vic's pickups, it works with other designs, string types, and magnetic pickups. Adapters for TRS or 2.5mm micro-jacks are available for purchase in the dropdown menu below.
Bridge Wing Pickup Performance Tip: For the best tone, ensure your bridge pickup has a snug fit. If the fit is loose, a small shim or guitar pick can help find the "sweet spot." More information about this can be found on the pickup page.
Product Specifications:
Wide: 4.1" (105 mm)
Tall: 5.2" (132 mm)
Deep: 1.9" (50 mm)
Weight: 13 oz
Power: 9V DC
Finish: Black powder-coated enclosure with a laser engraved faceplate.
(Dimensions include the protrusion of all knobs and switches. Due to the laser process, engraving depth may vary slightly; all info remains clearly visible.)
Power & Battery Life:
USB-C Charging: Uses a 9V battery, but includes a 5V USB-C port and internal pigtail. This allows you to use and charge a rechargeable 9V without removing the back cover.
Battery Life: Confirmed for at least 24 hours of continuous run time with standard 9V and good quality rechargeable 9V batteries.
Smart Switching: An orange LED indicates power. When the switch is off, the battery will not drain even if your cables remain plugged in.
Mounting & Hardware:
Tailpiece Mount: The unit mounts at the top of the tailpiece via a fixed Velcro strap and foam rubber pad intended to wrap around the strings. This ensures a firm grip that won't slide or affect the sound of your strings.
Pedalboard Ready: The Velcro strap can be removed for pedalboard use.
Easy Access: Includes optional thumb screws for tool-free backplate removal and an optional second strap with adhesive clips for a more permanent mount.
Fulfillment & Shipping:
Preamps Are Shipped Worldwide Via UPS
Hand-Built Quality: Each blender is hand-built by Vic, including "old school" point-to-point wiring. Because these are made to order, an estimated shipment date will be provided to you via email as soon as possible.
Personalized Video: When your order ships, you will receive a custom "Proof of Function" video. This video shows your specific unit in action and includes a quick start walkthrough to ensure you're ready to plug in and play.
Warranty & Returns:
30-Day Returns: Returns are accepted up to 30 days after delivery.
Lifetime Warranty: This unit comes with a lifetime free repair warranty.
Direct Support: If you have questions about setup or need a custom adapter for a specific pickup, feel free to reach out directly. Vic@UprightBassPickups.com
AVAILABLE FOR ORDER APRIL 16th, 2026
Holy cow, you guys are awesome! Due to an overwhelming amount of requests and inquiries, the current order queue is quite long.
As I am a one-man operation and it takes a bit of time to hand-build each unit, the current lead time for shipping is approximately 2 weeks until further notice.
Please provide your best email address with your order, as I will be contacting you directly with your approximate shipping date. I appreciate your patience and support as I work to get every preamp built to the highest standard!
Vic’s Bridge & Slap Blender
Quick Start: We recommend starting with your amp at a moderate volume and all preamp knobs (Gain and EQ) at 12 o’clock. At this position, the unit outputs a safe signal level with approximately 6dB of attenuation on the mid knobs. Adjust the Red (Bridge) and Black (Slap) knobs first to set your output blend, then use the switches and EQ knobs to find the specific frequency control and tone you like.
Tone & Feedback Control: This dual-channel preamp provides a clean, buffered signal via a TL072 preamp circuit. Its features are designed to manage feedback and to condition the signal of two separate pickups before hitting your bass amplifier.
Red Bridge Knob: Controls the master output gain for the bridge wing channel on the top of the unit.
Black Slap Knob: Controls the "click" and percussive elements from your under-the-fingerboard pickup. As you increase this knob clockwise, more 5kHz frequency and higher is introduced into the blend.
Polarity Switch: An instant feedback killer for loud stages; it changes how the bridge pickup reacts to speaker sound waves.
70Hz High Pass Filter: A switch to cut out stage rumble and low-end boom.
Low Mid Knob (350Hz): Turning this clockwise reduces the "congested" or "boxy" frequencies that often cause low-end groaning.
High Mid Knob (1.5kHz): Reduces the "clacky" or "brittle" sound common with piezo pickups.
Note: The EQ knobs, Polarity switch, and HPF only affect the Bridge channel. The Slap channel is fixed in its upper frequency range to preserve the "click" and is not affected by these controls.
Connectivity & Versatility:
Input: Features two 1/4” inputs for Bridge Wing and Neck Slap pickups. While optimized for Vic's pickups, it works with other designs, string types, and magnetic pickups. Adapters for TRS or 2.5mm micro-jacks are available for purchase in the dropdown menu below.
Bridge Wing Pickup Performance Tip: For the best tone, ensure your bridge pickup has a snug fit. If the fit is loose, a small shim or guitar pick can help find the "sweet spot." More information about this can be found on the pickup page.
Product Specifications:
Wide: 4.1" (105 mm)
Tall: 5.2" (132 mm)
Deep: 1.9" (50 mm)
Weight: 13 oz
Power: 9V DC
Finish: Black powder-coated enclosure with a laser engraved faceplate.
(Dimensions include the protrusion of all knobs and switches. Due to the laser process, engraving depth may vary slightly; all info remains clearly visible.)
Power & Battery Life:
USB-C Charging: Uses a 9V battery, but includes a 5V USB-C port and internal pigtail. This allows you to use and charge a rechargeable 9V without removing the back cover.
Battery Life: Confirmed for at least 24 hours of continuous run time with standard 9V and good quality rechargeable 9V batteries.
Smart Switching: An orange LED indicates power. When the switch is off, the battery will not drain even if your cables remain plugged in.
Mounting & Hardware:
Tailpiece Mount: The unit mounts at the top of the tailpiece via a fixed Velcro strap and foam rubber pad intended to wrap around the strings. This ensures a firm grip that won't slide or affect the sound of your strings.
Pedalboard Ready: The Velcro strap can be removed for pedalboard use.
Easy Access: Includes optional thumb screws for tool-free backplate removal and an optional second strap with adhesive clips for a more permanent mount.
Fulfillment & Shipping:
Preamps Are Shipped Worldwide Via UPS
Hand-Built Quality: Each blender is hand-built by Vic, including "old school" point-to-point wiring. Because these are made to order, an estimated shipment date will be provided to you via email as soon as possible.
Personalized Video: When your order ships, you will receive a custom "Proof of Function" video. This video shows your specific unit in action and includes a quick start walkthrough to ensure you're ready to plug in and play.
Warranty & Returns:
30-Day Returns: Returns are accepted up to 30 days after delivery.
Lifetime Warranty: This unit comes with a lifetime free repair warranty.
Direct Support: If you have questions about setup or need a custom adapter for a specific pickup, feel free to reach out directly. Vic@UprightBassPickups.com
AVAILABLE FOR ORDER APRIL 16th, 2026
Holy cow, you guys are awesome! Due to an overwhelming amount of requests and inquiries, the current order queue is quite long.
As I am a one-man operation and it takes a bit of time to hand-build each unit, the current lead time for shipping is approximately 2 weeks until further notice.
Please provide your best email address with your order, as I will be contacting you directly with your approximate shipping date. I appreciate your patience and support as I work to get every preamp built to the highest standard!
