Fosi Audio GR40 Tube DAC Headphone Amp/Preamp headphone proprietary mmcx and jog wheels on the

and jog wheels on the controller

USB HOST interface - supports external USB devices such as external decoders/hard disks/ keyboards/expansion hubs

Low-jitter femto clock crystal provides >20dB performance

precise fit for a variety of IEMs

the sound is less distorted because of the pressure change

Fosi Audio GR40 Tube DAC Headphone Amp/Preamp headphone proprietary mmcx and jog wheels on theProduct details Multifunctional DAC Preamplifier: The GR40 is a versatile tube DAC preamplifier and headphone amplifier in one, it supports Bluetooth USB Optical Coaxial inputs and active speakers 3. 5mm headphone output, with a priority mode for headphones. High Resolution Decoding: With the ESS9028Q2M DAC chip, the preamplifier offers superior audio quality and flexibility. The USB sampling rate supports 32Bit 384kHz and DSD256, making an effective