Dual-channel passive audio isolator, using Permalloy material audio isolation cattle, so that the signal is completely connected. Dual RCA and XLR XLR inputs, XRL XLR outputs. Unbalanced signal can be input into balanced signal output, balanced signal can be input into balanced signal output. Each channel has a common ground and non-common ground switch. It can completely isolate the potential difference between the two systems, avoid AC noise interference caused by grounding problems, and prevent damage to the input components of the device due to excessively high potential differences. Achieve the secure transmission of audio signals. Remove the noise generated by the connection between the camera and the audio equipment; the noise generated when the simultaneous interpretation equipment is connected to the mixer; the noise generated by the laptop connected to the mixer; the noise generated by the electronic musical instrument connected to the mixer. It is suitable for a series of sound equipment systems such as large-scale outdoor performances, Fast Charging protection, sound engineering, conferences, entertainment venues, exhibitions, etc. Parameter: 1. Impedance ratio: Input impedance: 600Q (AC impedance) Output impedance: 6002 (AC impedance) 2. Frequency response: 20Hz-20KHz (± 0.3dB,+4dBu) 3. Fixed loss:Less than 0.7db (ref1khz1Vrms) 4. Input level:+28dBu (THD Less than 0.5%, 50Hz, THD Less than 0.01%, 1KHz) 5. Distortion: 0.0025% (+4dBu 1KHz) 6. Loss attenuation: -0.5dB at 600Q load; 0. dB at 10KQ load 7. Settings: Input - XLR female and output - XLR male Jack6.35mm dual core socket input/output. A channel grounding switch, B channel grounding switch, A+B shielded enclosure switch 8. Insulation resistance: DC1000V100M Ω 9. Isolation voltage:AC50Hz-60Hz 0V-1500V Colour:Black M