Jiayouy Guitar Pickup 4 Band EQ-7545R Preamp Equalizer - Natural

In this review the Jiayouy Guitar Pickup 4 Band EQ-7545R is assessed as a practical, budget-friendly preamp for acoustic players who want more control over their amplified tone. The review finds it especially useful for players using piezo saddle pickups on standard acoustic and cigar box guitars, because its 4-band equalizer plus volume offers quick, surgery-free shaping of bass, middle and treble while the built-in battery box and included end pin jack make installation straightforward.

Key Features

• 4-Band Equalizer: Four frequency bands let you push bass, middle and treble independently so you can dial in fuller low end or clearer highs without changing your guitar setup.
• Pre-wired Assembly: The unit comes pre-wired with a 2.5mm connecting plug and parts included, which shortens the installation time and reduces the need for soldering.
• Built-in Battery Holder: The supplied battery box accepts a 9V cell so the preamp is self-contained and can be mounted inside the guitar cavity.
• Under Saddle Pickup Compatibility: Designed for an under the saddle piezo pickup, it works well for standard acoustic and cigar box guitars to deliver responsive string-to-string dynamics.
• Battery Indicator LED: The LED battery check warns when the cell needs replacing, helping avoid tone loss during a performance.

Who It's For

This preamp is a good match for acoustic players who need a simple, effective onboard EQ to shape their amplified tone without a complex external rig. It suits DIY installers and local giggers who value quick setup, a clear frequency response and the ability to boost presence or warmth on stage.

Players who need advanced onboard features like feedback suppression, mid-shift shelving, or a built-in tuner should look elsewhere; similarly, those seeking boutique branded electronics with premium components may prefer higher-cost preamps. For straightforward tone control on a budget, this unit is well suited.

Pros & Cons

Pros

• Very easy to install thanks to pre-wired connections and a supplied end pin jack and mounting hardware.
• Effective tonal shaping from the bass, middle and treble controls with clear string response noted by users.
• Good value: customers report it sounds great for the price and works well with small practice amps and CUBE-style speakers.

Cons

• Does not include the 9V battery, so you must provide one; replacement is straightforward but worth noting.
• Construction and components are functional rather than high-end, so players seeking boutique tone may prefer a premium unit.

Specifications

Material	ABS
Color	Black
Presence Control	12dB at 8KHz
Bass / Middle / Treble	12dB: Bass 600Hz, Mid 600Hz, Treble 2.2KHz
Input Impedance	10MOhm
Frequency Response	20Hz - 20KHz
Power	9V cell (not included)

Our Verdict

The Jiayouy 4 Band EQ-7545R is a practical, affordable preamp that gives acoustic players reliable onboard tone control and easy installation. It is best for gigging or practicing musicians who want to shape their piezo signal simply and affordably, offering strong value for those who do not require boutique features.

Frequently Asked Questions

Does it come with a battery?
No, the unit requires a 9V battery which is not included; the supplied battery holder makes installation easy.

Will it fit a cigar box guitar?
Yes, it is suitable for standard acoustic and cigar box guitars and works with under saddle piezo pickups.

Is installation difficult?
Installation is straightforward because the unit is pre-wired and includes an end pin jack, mounting screws and a sticky plate for mounting.