Douk Audio MC5-BX Mini Stereo 4-Channel Audio Mixer Review

The Douk Audio MC5-BX is a mini stereo audio mixer priced at $33.29. It offers four groups of 3.5mm inputs and one 3.5mm AUX output, designed to blend signals from CD players, instruments, portable recording devices and video playback devices into a single feed.

The mixer works in two modes. In active mode you connect independent USB power (Type-C, DC 5V at 0.5A or more) and the built-in audio amp chip amplifies the mixed signal for a larger output with a 3-ohm output impedance. In passive mode no power is required at all - the MC5-BX works as pure resistive attenuation with a 50K-ohm input impedance and 4.7K-ohm output impedance, and the output is a little attenuated, which is the trade-off for the cleanest possible signal path.

On the front panel, one main output volume knob joins four independent input volume knobs, so each source level can be set separately with no interference between channels. The metal casing provides better shielding, and the flexible circuit mixes signals without degrading sound quality. Two warm tips from the manufacturer: in active mode, never share a power supply with your audio device or common ground noise will appear, and keep wireless devices such as Wi-Fi routers and phones away from the unit to avoid noise. Also note it only supports standard audio signals such as CD, DVD and phone sources - phono turntables and microphones cannot connect directly.

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.