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Douk Audio EQ5-TONE Mini 5-Band EQ Equalizer with Bluetooth Receiver and VU Meter Review

A 5-band stereo equalizer and preamp with bands at 75Hz through 10kHz, each processed by its own op-amp, plus Bluetooth 5.0 streaming and twin 45mm VU meters. A bypass switch takes the EQ out of the signal path entirely.

3.63.6 out of 5 starsUpdated October 14, 2026
$89.99Price checked October 14, 2026
Check price at Douk Audio
Douk Audio EQ5-TONE Mini 5-Band EQ Equalizer with Bluetooth Receiver and VU Meter

Our verdict

The EQ5-TONE is a flexible desk equalizer at $89.99: five bands with individual op-amp buffering, Bluetooth 5.0, hands-on VU meters and a true bypass for honest comparisons. The balance control is a nice extra for correcting off-center imaging. Two habits to keep - power it from its own USB supply, and never connect both the RCA and AUX inputs at once.

Best for
Desktop listeners who want hands-on tone shaping, VU-meter charm and a Bluetooth input in one compact unit.
Skip if
You need far more EQ bands, or you cannot give it a dedicated USB power supply.
Check price at Douk AudioHow we research

The Douk Audio EQ5-TONE is a mini 5-band stereo equalizer and preamplifier priced at $89.99. It sits between your sources and amplifier, letting you compensate for speaker and room deficiencies by adjusting five frequency bands, while adding a pair of VU meters and a Bluetooth receiver to the desktop.

The equalizer splits the spectrum into five controls - 75Hz, 400Hz, 800Hz, 4kHz and 10kHz - and each band is processed by one op-amp independently, so adjusting one range does not smear the others. The maker positions it for correcting the defects of speakers and sound fields and modifying various sound sources. Bluetooth 5.0 input makes it a receiver as well, and the dual 45mm VU meters are driven by a dedicated driver chip with adjustable backlight, pointer speed and gain to match your space.

Held in the all-metal case are stereo RCA and 3.5mm AUX inputs (wired in parallel, so only one should be connected at a time), stereo RCA and 3.5mm outputs, a bypass mode that routes the signal directly from input to output without processing, and an L/R balance control to prevent the sound field from drifting off center. Power comes from USB (Type-C, DC 5V at 500mA or more) - no adapter is included, and a separate supply is important: sharing power with your audio source or using a computer port causes common ground noise. Note also that in bypass mode, the VU meters will not function unless the signal has been preamplified.

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.

What we liked

  • Five separate EQ bands (75Hz, 400Hz, 800Hz, 4kHz, 10kHz), each processed by its own op-amp independently
  • Bluetooth 5.0 input for wireless streaming without adding an external receiver
  • Dual 45mm VU meters driven by a dedicated driver chip, with adjustable backlight, pointer speed and gain
  • Bypass mode passes the signal untouched for honest A/B comparisons, plus a balance control to correct L/R imaging
  • All-metal case with gold-plated I/O and knurled aluminum knobs for shielding and minimal signal loss

Worth noting

  • Needs its own USB power supply - the maker warns against using a computer's USB port or sharing power with the audio source, which causes ground noise
  • Stereo RCA and 3.5mm AUX inputs are wired in parallel, so connect only one input at a time to avoid signal mixing
  • In bypass mode without preamplification the VU meters will not function, and no power adapter is included

Questions before you buy

What frequencies can I adjust?

Five bands: 75Hz, 400Hz, 800Hz, 4kHz and 10kHz, each processed by one op amp independently.

What does bypass mode do?

It turns off EQ preamplification so the signal outputs from IN to OUT directly without any processing - note that without preamplification in bypass mode, the VU meters will not function.

Can I connect both RCA and AUX inputs?

No - the stereo RCA and 3.5mm AUX inputs are in parallel and would work simultaneously, so connect only one input at a time to avoid signal mixing.

How should I power it?

Use a separate USB power supply (DC 5V, at least 500mA). Do not use a computer's USB port or share the supply with your audio source, as common ground noise will be caused.

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