【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
[Multi-functional DAC preamplifier] GR40 is a multifunctional vacuum tube DAC preamplifier and headphone amplifier integrated product, which supports Bluetooth/USB/optical/coaxial input and active speaker/3.5mm headphone output, and has a headphone priority mode.
【High Resolution Decoding】Equipped with ES9028Q2M DAC chip, the preamplifier provides excellent audio quality and flexibility. USB sampling rate supports 32Bit/384kHz and DSD256, providing effective noise reduction to ensure lossless audio at all times.
【Advanced Bluetooth with Low Latency】Equipped with QCC3031 Bluetooth module, supports aptX, aptX-HD, aptX-LL codec, provides detailed and clean audio sound. You can also get a relaxing experience with low latency when watching movies.
【Compact and Highly Functional】The combination of a compact shape and the preamp's volume, bass, and treble controls allows the stereo preamp to produce a sweeter, more organic sound while preserving the midrange and treble frequencies that make up your music.
[User-Friendly Design] Digital-to-analog audio converter GR40 is designed with user convenience in mind, allowing you to switch between different audio inputs and restore Bluetooth. A true plug-and-plug DAC preamp with no drivers required.
Fosi Audio GR40 Vacuum Tube Preamp with DAC Stereo Headphone Amplifier 3.5mm Home Audio Active Speaker/Headphone Digital to Analog Audio Converter Preamp Bluetooth/USB/OPT/COAX Input
