28mm Solid Aluminum Volume Knob for Audio Amplifier – Silver
28mm Solid Aluminum Volume Knob for Audio Amplifier – Silver
28mm Solid Aluminum Alloy Volume Knob for Audio Amplifiers & Hi-Fi Systems
Upgrade your audio equipment with this premium 28×28mm solid pure aluminum alloy volume knob. Precision CNC-machined and finished with a professional sandblasting and anodizing treatment, this potentiometer knob delivers a satisfying, tactile feel with a sleek, modern aesthetic — perfect for hi-fi amplifiers, tone control boards, preamps, and DIY audio projects.
Key Features
- Solid Aluminum Construction: Pure aluminum alloy body for a substantial, premium feel and long-lasting durability.
- CNC Precision Machined: Tight tolerances ensure a secure, wobble-free fit on your potentiometer shaft.
- Sandblasted & Anodized Finish: Provides a refined matte surface that resists fingerprints and corrosion.
- Top-Side Screw Fastening: Easy to install and remove — no special tools required.
- Dimensions: Diameter 28mm × Height 28mm; Shank thickness 5mm; Potentiometer aperture 6mm.
- Wide Compatibility: Fits standard 6mm potentiometer shafts used in most audio amplifiers, mixers, preamps, and electronic hobby projects.
- Available in Silver & Black: Choose the finish that best matches your build or chassis.
Specifications
| Spec | Detail |
|---|---|
| Material | Solid Aluminum Alloy |
| Diameter | 28mm |
| Height | 28mm |
| Shank Diameter | 5mm |
| Potentiometer Aperture | 6mm |
| Surface Treatment | Sandblasting + Anodizing |
| Fastening Method | Top screw (side fastening) |
| Color Options | Silver / Black |
| Country of Origin | Made in China |
What's in the Box
- 1 × Aluminum Alloy Volume Knob (28×28mm)
Note: Minor color variation may occur due to screen settings and lighting. Dimensional tolerance is ±1–3mm.
Ideal Applications
- Hi-Fi audio amplifiers & preamplifiers
- Tone control and equalizer boards
- DIY electronics and audio builds
- Mixers, receivers, and home theater equipment
- Turntables and vintage audio restoration
For more information on electronics standards and components, visit the National Institute of Standards and Technology (NIST) Electronics Resources.
Frequently Asked Questions
Q: What potentiometer shaft size does this aluminum volume knob fit?
A: This solid aluminum alloy volume knob is designed to fit a standard 6mm potentiometer aperture, which is the most common shaft size used in audio amplifiers, preamps, tone control boards, and DIY electronic projects. The side set-screw fastening ensures a secure grip on 6mm shafts.
Q: Is this knob compatible with both D-shaft and round-shaft potentiometers?
A: This knob uses a set-screw (grub screw) fastening mechanism rather than a D-shaft press-fit, so it is compatible with both round-shaft and D-shaft potentiometers as long as the shaft diameter is 6mm. Simply tighten the side screw to lock it firmly in place.
Q: What makes the anodized finish better than a painted finish for an audio knob?
A: Anodizing is an electrochemical process that creates a hard, integrated oxide layer on the aluminum surface — making it far more durable, scratch-resistant, and corrosion-resistant than paint. It also provides a premium matte look that won't chip or peel over time, keeping your audio equipment looking sharp even with regular use.
Q: Can I use this knob for a tone control or bass/treble potentiometer on an amplifier?
A: Absolutely. This 28×28mm aluminum knob is perfectly suited for volume, tone, bass, treble, and balance controls on any audio amplifier or preamp that uses a standard 6mm shaft potentiometer. Its solid build and tactile grip make it a great upgrade for any hi-fi audio project.