Collection: GM Preamps

Network preamps are essential for getting great sound from the GM infotainment system. GM has used various network technologies for infotainment. Earliest models used MOST 50, and are compatible with the M650-GM preamp. Then GM switched to Ethernet - these vehicles are covered by the Zen AVB preamp. Starting in 2025, GM started using A2B in their large SUVs, and these are covered by the Zen A2B+ preamp. (For specific coverage information, always check the Compatibility tab on the individual product page before ordering.)

For more on network preamps, see our Tech Articles.