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6.35mm/3.5mm Stereo Output Stereo/mono Switch Ultra-compact Rca Input 4 Channels Mini Headphone Amplifier - Pro Audio Recording - AliExpress
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Whirlwind ISOPOD2 - iPod® interface, 3.5mm TRS input, transformer-balanced dual XLRM stereo output, ground lift, pad, mono switch ISOPOD2 · AV Gear
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