The Behringer HD400 is an ultra-compact, professional-grade 2-channel hum eliminator and audio line isolator that removes ground loop hum, buzz, and interference from your audio system. Ideal for use with mixers, audio interfaces, and PA systems, it provides clean and transparent signal isolation without altering your tone. Simply place it between your audio source and destination to eliminate noise instantly.
Eliminates ground loop hum and interference from audio signals
2 independent channels with 1/4" TRS input and output
Provides electrical isolation between devices
Preserves original audio signal with full frequency response
Passive design – no power required
Ultra-compact, durable metal housing
Ideal for studio, live sound, and broadcast applications
Channels: 2
Connectors: 2 x 1/4" TRS In, 2 x 1/4" TRS Out
Frequency Response: 20 Hz – 20 kHz (±0.5 dB)
Max Input Level: +20 dBu
Isolation Resistance: >100 MΩ
Dimensions: 110 x 60 x 35 mm
Weight: 0.18 kg