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Passive stereo audio isolator designed to eliminate hum, buzz and ground loop noise.
What is it?
Designed to preserve musicality and signal transparency, the AAL – HumFree Stereo Isolator is a passive audio isolation device that eliminates hum, buzz and noise caused by ground loops.
- Eliminates hum, buzz and digital interference
- Preserves audio clarity and transparency
- Passive design — no power supply required
Connectors
- Input: Stereo RCA + 3.5 mm jack
- Output: Stereo RCA
Why did you make it?
Laptop chargers, DACs, TVs, phones and other modern devices often introduce unwanted noise into audio systems.
HumFree was created to provide a simple, passive and effective solution for eliminating those ground loop problems without altering the listening experience.
Typical Applications
- DAC to amplifier isolation
- Laptop and phone audio cleanup
- Studio monitoring setups
- DJ equipment
- Home Hi-Fi systems
- TV audio hum removal
- Active speakers
- Live sound rigs
What makes it special?
Cable Mode (SHORT / LONG)
- LONG mode improves stability when using long audio cables
- SHORT mode (default) provides the most direct signal path for short cable runs
HF LINK
- Improves high-frequency interference suppression in difficult electrical environments.
Both options are configurable using tool-free internal jumpers. Simply unscrew the two knurled screws to access the PCB.
Why this price?
Built using carefully selected high-quality components (KYOCERA, Neutrik, Triad Magnetics, etc.) chosen for performance, reliability and long-term durability.
All parts are sourced from reputable suppliers to ensure quality and traceability.
Who did it?
Designed, hand-assembled and individually tested in France by AAL — Analog Audio Lab.
Practical electronics designed to solve real-world problems.
Links to code and documentation
No additional links provided for this product.
Shipping policy
No information available.
AAL - HumFree Stereo Isolator
Sold by Analog Audio Lab's store
$96.03
No tax for United States [change]
Stock available: 1
The seller
Electronics enthusiast since childhood, musician, and longtime engineer, I design and build electronic devices combining analog audio, embedded systems, and practical everyday innovation.
My background includes:
IT systems & network engineering
analog audio electronics
microcontroller and robotics projects
studio recording and live sound for more than 10 years
Today, through AAL (Analog Audio Lab), I develop DIY and boutique electronic solutions ranging from audio devices and signal conditioning tools to smart everyday electronics designed for reliability, simplicity, and real-world usefulness.
My background includes:
IT systems & network engineering
analog audio electronics
microcontroller and robotics projects
studio recording and live sound for more than 10 years
Today, through AAL (Analog Audio Lab), I develop DIY and boutique electronic solutions ranging from audio devices and signal conditioning tools to smart everyday electronics designed for reliability, simplicity, and real-world usefulness.