Neoteck 192kHz Digital to Analog Converter with Volume Adjustment Optical to 35mm Converter DAC Converter Compatible _x000D_ _x000D_ Neoteck Optical to 3.5mm Converter Elevate Your Audio Conversion Experience! _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Caution: You MUST set your TV/devices audio output to "PCM"this converter does not support Dolby/DTS 5.1 signals. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Built-in Professional Audio Amplifier Chip & Volume Knob _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Output level depends on your TV/devices optical signal. If source signal is too low, volume may still be limited. _x000D_ _x000D_ 1. Maximize "Digital Audio Output Volume" in your TV/devices. _x000D_ _x000D_ 2. Use converters volume knob to boost signal. _x000D_ _x000D_ 3. Connect converters 3.5mm output to external amplifier/power speakers _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Delivers Crystal-clear 192kHz/24-bit Audio Conversion, Enhancing Sound Quality! _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ This Audio Converter effortlessly connects optical outputs to 3.5mm headphones or speakers, solving the "no headphone jack" problem on modern TVs. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Note: No USB power adapter is included use your TVs USB port or a 5V/1A Adapter to power the device _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Plug-and-play design works instantly with TVs, 3.5mm Headphonesand powered speakers no drivers or complex setup needed _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 1. Not CompatibleStop Working? No Sound ? _x000D_ _x000D_ _x000D_ (1) This converter DOES NOT Compatible with 5.1 channel signal, such as DTS Dolby AC-3 and other. _x000D_ _x000D_ (2) Please kindly set the audio output of your devices such as HD TV, TV BOX, or game console to PCM before using. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 2. Low Volume? _x000D_ _x000D_ _x000D_ Output level depends on your TV/devices optical signal. If source signal is too low, volume may still be limited. _x000D_ _x000D_ 1Use converters volume knob & built-in amp to boost signal.2 Use converters volume knob & built-in amp to boost signal. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 3. Static Noise? Buzzing? Poping Sound? _x000D_ _x000D_ _x000D_ Using the device's USB port for power may cause current interference with the converter, resulting in crackling/disturbed audio _x000D_ _x000D_ Please use a separable 5V 1A power adapter to connect the USB cable to power the DAC. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 4. Broken voice? _x000D_ _x000D_ _x000D_ (1) Check whether the optical cable pin let out the red light normally after it is connected to the input device, and whether the optical connector is connected to the optical socket normally. _x000D_ _x000D_ (2) Try replacing a optical cable to connect. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Not Compatible with Netflix, YouTube? _x000D_ _x000D_ _x000D_ Please go to TV audio settings and change the digital audio output fromAUTO"toPCM". _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_