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AV receiver has two hdmi 2.1 input and two output : r/hometheater
4K HDMI 1-CAT-in, 1 x HDMI-out, 2 x CAT-out Chainable Receiver, SC&T HE03LR-4K - KVM-Switch Versand
DENON AVRX2700H 7.2CH AV RECEIVER WITH HEOS 8K UHD HDMI 6-IN/2-OUT - Radio Parts
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HDMI Extender Splitter 1x2 1080p Over Cat5e/Cat6/Cat7 Ethernet Cable with 2 HDMI Loop Out - Up to 50m/165ft - EDID Management & Bi-Directional IR Remote Control & POC Function (1 in 2
Onkyo TX-NR7100 9.2 Channel THX AV Receiver PLUS FREE HDMI CABLE
KD-FIX418A-2 - HDMI Connectivity Fixer with Audio De-Embedding and Down-Convert - key Digital
Understanding and Optimizing Your AV Receiver Connections