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Rca Input 4 Channels Stereo/mono Switch Mini Headphone Ultra-compact Amplifier 6.35mm/3.5mm Stereo Output - Pro Audio Recording - AliExpress
Using switched 1/4" jack....switching guitar cab from stereo to mono - Techtalk Speaker Building, Audio, Video Discussion Forum
![Rca Input 4 Channels Stereo/mono Switch Mini Headphone Ultra-compact Amplifier 6.35mm/3.5mm Stereo Output - Pro Audio Recording - AliExpress Rca Input 4 Channels Stereo/mono Switch Mini Headphone Ultra-compact Amplifier 6.35mm/3.5mm Stereo Output - Pro Audio Recording - AliExpress](https://ae01.alicdn.com/kf/Hb9a5c840aea247e48289a6b709b9a60cH/RCA-Input-4-Channels-Stereo-Mono-Switch-Mini-Headphone-Ultra-Compact-Amplifier-6-35mm-3-5mm.jpg_Q90.jpg_.webp)