ALPS RK27 Series 50K Stereo Volume Control Potentiometer
Best motorized component for high-end custom audio amplifier builds.
Enhance your audio projects with the ALPS RK27 Series 50K Stereo Volume Potentiometer. This high-quality component features a dual 50K logarithmic taper, perfect for precise volume control in amplifiers and audio equipment. Designed for PCB mounting with soldering termination, it ensures reliable performance and durability. The integrated motor allows for convenient remote or automated adjustments. Manufactured in Japan, this potentiometer offers exceptional quality and is ideal for both DIY enthusiasts and professionals seeking superior audio components. It comes in original packaging, guaranteeing authenticity and readiness for your next build.
$29.25
Owner Satisfaction
4.8
/ 5
Category Rank
1
/ 413
Best Resistors
Price vs Category Average
-78%
Below average
Resistance
50
/ k Ohm
Who it's for
- Audiophiles seeking a premium, tactile adjustment experience
- Listeners prioritizing perfect stereo balance and imaging
- DIY builders wanting long-lasting, noise-free performance
Who should skip it
- Budget-conscious hobbyists building entry-level audio gear
- Engineers designing compact or space-constrained electronic enclosures
- Critical listeners requiring ultra-fine resolution at low volumes
Performance breakdown
Audio Signal Fidelity
Logarithmic taper ensures smooth, natural volume transitions for high-end audio.
Build Durability
Robust Japanese engineering provides long-term reliability for demanding amplifier builds.
Motorized Integration
Integrated motor allows seamless remote control functionality for modern audio setups.
Mounting Versatility
Standardized PCB mounting design simplifies installation for both DIY and professional projects.
Channel Matching
Dual-gang architecture maintains excellent stereo balance across the entire rotation range.
Tactile Precision
Slotted shaft offers a satisfying, precise feel during manual volume adjustments.
Key Specs
Resistance
50k Ohm
Type
Quad-unit stereo potentiometer
Series
RK27
Manufacturer
ALPS
Mounting Type
PCB Mount
Termination Style
Soldering
Tolerance
±20 %
Operating Temperature
-10 °C to 70 °C
Features
- Dual 50K logarithmic taper for precise audio control
- Integrated motor for remote adjustments
- Slotted shaft for easy manual operation
- Designed for reliable PCB mounting
- Durable construction from Japan
- Ideal for mid-range and high-end amplifiers
- Quad-unit design for stereo applications
- Original ALPS component for quality assurance
What customers say
The ALPS RK27 Series potentiometer, or Blue Velvet, is highly regarded for its exceptional mechanical feel and superior electrical performance in high fidelity audio. Users consistently praise the smooth, damped rotation, noting a premium tactile experience unmatched by lesser components. Its excellent channel tracking ensures precise stereo balance, even at low volumes, which audiophiles value greatly. Reviewers also highlight its sonic transparency, reporting virtually no signal coloration or added noise. While the cost is higher, the consensus is that the significant sonic benefits and long term reliability fully justify the investment for serious audio builds and restorations. It is viewed as an essential upgrade for achieving true high end sound reproduction.
Know before you buy
A logarithmic taper, or audio taper, is designed to match the way the human ear perceives sound. It provides a smooth, natural increase in volume as you turn the knob, rather than a sudden jump in loudness.
Yes, the integrated motor is optional. You can operate the potentiometer manually using the slotted shaft just like a standard volume control, or use the motor for remote-controlled adjustments if your circuit supports it.
The RK27 series is designed specifically for PCB mounting with soldering termination. Please verify your board's footprint and pin spacing against the manufacturer's datasheet to ensure a proper fit before soldering.
While a 20% tolerance is standard for this class of component, ALPS is known for high-quality tracking between the two gangs. For most high-end audio applications, the channel matching is excellent, though you should account for this tolerance in your circuit design.
The motor typically requires a separate DC power source to function. You will need to design a simple driver circuit or use a remote control module that provides the correct voltage and current to actuate the motor.
Yes, this 50K potentiometer is a versatile choice for both solid-state and tube-based audio circuits. Its robust construction and reliable performance make it a standard selection for mid-range and high-end audio projects.
Still have a question?
Ask Hayley anything about this product before you decide.