DOUK AUDIO VFD253-PRO VU Meter 4-Channel RCA Selector

The Douk Audio VFD253-PRO is a 4-channel RCA analog audio selector and distributor featuring a 25 × 15-segment VFD display for real-time visualization of the music spectrum. It can operate in 1 input / 4 outputs mode to distribute a source to one or more outputs, or in 4 inputs / 1 output mode to easily select one of four audio sources, with illuminated buttons indicating the active channel.

Its display offers 7 main modes with sub-modes, three spectrum ranges (LOW / MID / FULL), as well as brightness, gain, sensitivity, peak hold, and display response settings with Real Display and Smooth Display modes. The audio signal passes directly between the RCA inputs and outputs without processing by an operational amplifier, while transformer isolation separates the VFD display control circuit from the audio path to limit interference.

The VFD253-PRO also features a built-in microphone for sound detection, a clock display based on the RX8025T circuit with an advertised accuracy of ±1 minute per year, a remote control, settings memory after power-off, and an aluminum enclosure with a tempered glass front panel. It operates on DC 5V / ≥1A via a USB-C port.