What is the primary function of this knob?

It serves as a replacement upper-tier control for stacked potentiometers, commonly found on Fender Deluxe Series Jazz Basses. It allows the player to adjust the top parameter of a dual-control pot independently.

What material is used in its construction?

The knob is made from lightweight black plastic. This ensures durability while keeping the weight low to prevent unnecessary stress on the potentiometer shaft.

Which specific bass models is this knob designed for?

It is designed specifically for the Fender American Deluxe and Deluxe Series Jazz Bass models. It is ideal for restoring these instruments to their original factory specifications.

What size potentiometer shaft does this knob fit?

The knob is designed to fit 1/4-inch solid shaft potentiometers. This is the standard size for the upper portion of most American-made concentric pots.

How is the knob secured to the potentiometer?

The knob requires a set screw for installation. Once tightened against the solid shaft of the potentiometer, it provides a secure, slip-free connection.

Does this package include the lower concentric knob?

No, this product is the upper knob only. The lower ring, which controls the bottom parameter of the stacked pot, must be purchased separately if needed.

Is there a visual indicator for setting positions?

Yes, the knob features a crisp white indicator line. This helps bassists see their settings clearly at a glance, even on dark stages or in busy rehearsal spaces.

What is the typical price range for this replacement part?

This part generally retails for approximately 7 GBP. Prices may vary slightly depending on the specific retailer and shipping costs.

Can this be used on a standard Precision Bass?

Standard Precision Basses usually use single-shaft pots and would not require a concentric knob. However, if the bass has been modified with stacked pots, this knob may fit if the shaft is 1/4-inch solid.

Is the set screw included with the knob?

According to the manufacturer description, the knob fits securely once paired with your own set screw. It is always advisable to check if a screw is pre-installed in the replacement part.

Why would a bassist need to replace this part?

It is typically replaced if the original knob is missing, worn out, or if the indicator line has faded. It is a straightforward way to restore the aesthetic and functionality of the bass.

How does this compare to metal knurled knobs?

This plastic version is lighter and offers the specific aesthetic of the Deluxe Jazz Bass series. Metal knobs are heavier and often provide a different grip texture compared to this smooth plastic design.

Gear article

Fender Deluxe Jazz Bass Upper Concentric Knob

The Fender Deluxe Jazz Bass Upper Concentric Knob is a genuine replacement part designed for use with stacked potentiometers on American Deluxe and Deluxe Series Jazz Bass models. Constructed from lightweight black plastic with a white indicator line, it provides a secure fit for 1/4-inch solid shaft pots, facilitating precise tonal adjustments during live performance.

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Overview

The Fender Deluxe Jazz Bass Upper Concentric Knob serves as a standard replacement component for bass guitars utilizing 'stacked' control layouts. Unlike single-layer knobs, this component is designed specifically to occupy the upper tier of a dual-concentric potentiometer, allowing for independent control of two different parameters—typically volume and tone or active EQ frequencies—within a single footprint on the instrument's control plate.

Design and Construction

Manufactured from durable black plastic, the knob is engineered to be lightweight, ensuring it does not add unnecessary mass to the control assembly. It features a high-contrast white indicator line, which is essential for visual orientation in low-light environments such as stages or dim practice rooms. The internal bore is sized for a 1/4-inch solid shaft, and the knob is secured using a standard set screw to prevent slipping during rapid adjustments.

Instrument Compatibility

This part is explicitly designed for Fender's higher-end bass lines, specifically the American Deluxe and Deluxe Series Jazz Basses. These models frequently feature active electronics that require stacked potentiometers to manage the expanded EQ options without requiring extra holes in the body or control plate. While primarily intended for these series, it will fit any standard 1/4-inch solid shaft upper section of a concentric pot.

Utility in Performance

For gigging musicians, the tactile response and visual feedback of control knobs are critical. This replacement part restores the original factory feel of the instrument, ensuring that 'fast tweaks' remain accurate. The secure fit provided by the set-screw mounting ensures that the upper knob does not inadvertently turn the lower ring, maintaining the independence of the dual controls.

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Frequently asked questions

What is the primary function of this knob?: It serves as a replacement upper-tier control for stacked potentiometers, commonly found on Fender Deluxe Series Jazz Basses. It allows the player to adjust the top parameter of a dual-control pot independently.
What material is used in its construction?: The knob is made from lightweight black plastic. This ensures durability while keeping the weight low to prevent unnecessary stress on the potentiometer shaft.
Which specific bass models is this knob designed for?: It is designed specifically for the Fender American Deluxe and Deluxe Series Jazz Bass models. It is ideal for restoring these instruments to their original factory specifications.
What size potentiometer shaft does this knob fit?: The knob is designed to fit 1/4-inch solid shaft potentiometers. This is the standard size for the upper portion of most American-made concentric pots.
How is the knob secured to the potentiometer?: The knob requires a set screw for installation. Once tightened against the solid shaft of the potentiometer, it provides a secure, slip-free connection.
Does this package include the lower concentric knob?: No, this product is the upper knob only. The lower ring, which controls the bottom parameter of the stacked pot, must be purchased separately if needed.
Is there a visual indicator for setting positions?: Yes, the knob features a crisp white indicator line. This helps bassists see their settings clearly at a glance, even on dark stages or in busy rehearsal spaces.
What is the typical price range for this replacement part?: This part generally retails for approximately 7 GBP. Prices may vary slightly depending on the specific retailer and shipping costs.
Can this be used on a standard Precision Bass?: Standard Precision Basses usually use single-shaft pots and would not require a concentric knob. However, if the bass has been modified with stacked pots, this knob may fit if the shaft is 1/4-inch solid.
Is the set screw included with the knob?: According to the manufacturer description, the knob fits securely once paired with your own set screw. It is always advisable to check if a screw is pre-installed in the replacement part.
Why would a bassist need to replace this part?: It is typically replaced if the original knob is missing, worn out, or if the indicator line has faded. It is a straightforward way to restore the aesthetic and functionality of the bass.
How does this compare to metal knurled knobs?: This plastic version is lighter and offers the specific aesthetic of the Deluxe Jazz Bass series. Metal knobs are heavier and often provide a different grip texture compared to this smooth plastic design.