Description
The BOSS Audio Systems B25N is an inline ground-loop isolator designed to reduce noise, hum, and alternator whine caused by audio components connected to different ground locations. It installs in the RCA signal path between a source unit and amplifier or other audio component.
- Model: B25N
- Type: two-channel ground-loop isolator / noise filter
- Connection: stereo RCA audio
- Use: helps suppress ground-loop noise, hum, and alternator whine
- Requires two male-to-male RCA cables (not included)
- Approximate dimensions: 3.4 × 1.5 × 1.5 in
- Approximate weight: 0.30 lb
For best results, correct any underlying grounding faults and route signal cables away from power wiring.
In Stock — Ready to Ship

