Douk Audio TUBE-T5C Mini Tube Preamp, 4-Way Selector and Headphone Amp with VU Meter Review

The Douk Audio TUBE-T5C is a compact tube preamp and switcher priced at $109.99. It accepts up to four RCA sources - CD players, DACs, streamers, Blu-ray players - lets you switch between them from the front panel, and sends the signal to two RCA outputs at once, so two amplifiers or two pairs of active speakers can stay permanently connected. A 3.5mm headphone jack turns it into a headphone amp as well.

The tube section runs at a boosted 180V from an isolated, metal-shielded power supply, which the maker says reduces interference for a cleaner and more stable audio signal. A single ECC83 tube glows behind a VU meter that pulses with the music, and adjustable internal RGB lighting adds to the vintage look. Bass and treble knobs provide plus or minus 6dB of tone shaping, and the headphone output delivers up to 500mW into 32 ohms for a wide range of headphones.

For tinkerers, both the NE5532 op-amp and the ECC83 tube sit in pluggable sockets. The op-amp can be swapped for dual types such as 2134, 2604, 5532, 2068 or Muse02, and the tube for PSVANE 12AX7-S or Shuguang 12AX7B, 7025 and 12AX7 types. Two practical notes: every output works at the same time and shares the same volume and tone settings, and the unit needs roughly 10 seconds to warm up before audio passes. Turn it off before swapping the op-amp or tube, as high voltage is present inside.

Douk Audio ships worldwide with free and expedited shipping options at varying cost by country. Packages under 2kg travel by airmail in roughly 10-25 days, while orders over 2kg ship via DHL/UPS/FedEx in about 5-8 days, and any import duties or customs charges are the customer's responsibility. Returns are free within 30 days for a full refund, and every item carries a 1-year warranty. Exclusions cover orders placed by mistake, man-made damage or misuse, a change of mind, and anything outside the warranty terms.