“Will this device increase the sound output for headphones, so that it makes it louder for some who's hearing is not good”
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Hello Jack! Thank you for your question. The NS‑HZ340 HDMI Audio Extractor does not amplify or boost headphone volume, it only converts HDMI audio into analog or optical output. If someone needs louder headphone audio, an external headphone amplifier would be required alongside this extractor Sidhartha | Insignia
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