Douk Audio B1 Mini EQ Equalizer Bluetooth Receiver Stereo Audio Mini Preamp with VU Meter 5-Band &

【Important Notice for International Buyers – Tomoayax Premium Audio Hi-Fi Japan】

■ Voltage Compatibility This product is designed exclusively for use in Japan (AC 100V, 50/60Hz).

Many regions use 120V or 220–240V. Using this product without a proper transformer in such voltage environments may result in malfunction, overheating, or serious and irreversible damage.

■ Plug Type This product uses a Japanese plug (Type A or B). A plug adapter may be required depending on your region.

■ Transformer Requirement (Very Important) A transformer is required for safe use.

A plug adapter only changes the plug shape and DOES NOT convert voltage. Using this product without a transformer may cause serious and irreversible damage.

■ Buyer Responsibility As this is high-end audio equipment, the buyer is fully responsible for confirming compatibility with their local voltage (100V / 120V / 220–240V) and usage environment before purchase.

■ No Return / No Refund Policy We do NOT accept returns or refunds for: ・Voltage mismatch (including 120V and 220–240V environments) ・Use without a transformer ・Plug incompatibility ・Damage caused by improper setup or usage

■ Liability We are not responsible for any damage, malfunction, or performance issues caused by improper use or incorrect voltage conditions.

■ Final Notice Please ensure full understanding of the above before purchasing. Use only under the correct voltage environment. 1. 5-Band EQ Equalizer and Preamp Function: Features 5 bands (75Hz/400Hz/800Hz/4KHz/10KHz) for individual frequency adjustment. Each band is processed by an independent operational amplifier, compensating for speaker and sound field shortcomings and optimizing the balance of high, mid, and low frequencies for various sound sources. 2. Adjustable VU Meters and Bluetooth Input: Dual large VU meters (45mm) driven by a dedicated VU driver chip. Adjustable background light, needle speed, and gain dynamically enhance your audio environment, providing unparalleled visual effects. A Bluetooth 5.0 input is added, making it easy to enjoy HiFi music wirelessly. 3. Bypass Design and Balance Adjustment: It features a bypass mode that allows you to turn off the EQ preamp, so the audio signal is output directly from IN to OUT without processing. This makes it easy to enjoy the original sound. It also has a left/right channel balance adjustment function to keep the sound field centered. 4. Attractive and Powerful Design: Features a metal case and aluminum nut-machined knobs for superior shielding. All I/O interfaces are gold-plated to ensure smooth transmission of the original audio signal and minimize signal loss. Mini-sized and operating on DC 5V, it's highly portable and easy to use in many scenarios. 5. Compact and High-Performance Audio Component: Despite its compact size, the Douk Audio B1 delivers high-quality audio signal reproduction and adjustment capabilities. Visual feedback from the VU meter and fast, stable transmission via Bluetooth 5.0 allow users to enjoy an optimal sound experience at home or on the go. Tags: Amplifier, Tube amplifier, Tube amplifier kit, Phono equalizer, Integrated amplifier, Tube, 5.1ch amplifier, Small amplifier, Tube preamplifier, Tube radio