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Fosi Audio GR40 DAC Tube Preamplifier Headphone amplifier
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Fosi Audio GR40 DAC ESS9028Q2M Tube Preamplifier 2x JAN5654W Headphone Amplifier Bluetooth 5.1 32bit 384kHz DSD256
Fosi Audio's GR40 is a versatile, compact stereo DAC and tube preamplifier, featuring full connectivity and Bluetooth 5.1. The digital-to-analog conversion section is based on an ESS9028Q2M DAC chip, and enables signal conversion up to PCM 32bit 384kHz and DSD256. Coupled with the tube preamplifier stage, the GR40 delivers the rich, warm sound characteristic of tube preamplifiers. The whole unit is housed in an attractive, precision CNC-machined aluminum case.
Fosi Audio GR40: ESS9028Q2M DAC
Fosi Audio's GR40 features an ESS9028Q2M DAC chip for precise digital-to-analog conversion. This DAC supports audio streams up to PCM 32bit 384kHz and DSD256, guaranteeing faithful, detailed sound reproduction.
Fosi Audio GR40: Tube preamplification & Tone control
The GR40's preamplifier stage is based on two JAN 5654W tubes. The use of tube amplification technology gives the sound reproduction a warm, rich timbre, ideal for rediscovering your favorite tunes in a new light.
The Fosi Audio GR40 also features a 3.5mm headphone output, capable of delivering 300mW at 16 Ohm or 40mW at 300 Ohm.
In addition, two buttons on the front panel provide access to tone control. This makes it quick and easy to adjust bass and treble levels to suit your listening style and audio system.
Fosi Audio GR40: Puce Bluetooth 5.1 QCC3031
The GR40 integrates Bluetooth 5.1 connectivity thanks to the Qualcomm QCC3031 chip, offering high-quality wireless broadcasting. Compatible with aptX, aptX HD, aptX Low Latency, SBC and AAC codecs, the GR40 ensures an optimal sound experience even when wireless.
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC Preamplifier Headphone amp |
| Inputs | 1x USB-C 1x Optical Toslink 1x Coaxial Bluetooth 5.1 |
| Outputs | 1x Stereo RCA 1x Jack 3.5mm headphone output |
| Channels | Stereo (2) |
| SNR | 103dB |
| Dynamic range | 104dB |
| THD | ≤ 0.03% |
| Headphone impedance | 32Ω-300Ω |
| Headphone output power | 300mW @ 16Ω 250mW @ 32Ω 50mW @ 250Ω 40mW @ 300Ω |
| Frequency response | 20Hz-20kHz (±1dB) |
| Supported sampling rates | PCM up to 32bit 384kHz DSD up to DSD256 |
| Bluetooth chips | Qualcomm QCC3031 |
| Bluetooth version | 5.1 |
| Max Bluetooth range | 10m (clear of obstacles) |
| Supported Bluetooth codecs | aptX, aptX HD, aptX Low Latency, SBC, AAC |
| General | |
|---|---|
| Supply voltage | 12V DC |
| Dimensions | 200 x 180 x 60mm |
| Weight | 800g |
| Color | Black |
| Package | 1x Fosi Audio GR40 1x Bluetooth antenna 2x JAN5654W tubes 2x Decorative rings 1x Power adapter |
| Input | Optical |
| Input | SPDIF |
| Input | Bluetooth |
| Input | USB |
| Output | RCA |
| Output | Jack 3.5mm |
| DAC / ADC Chip | ES9028Q2M |
| Max sampling rate | 384kHz |
| Max sampling rate | DSD256 |
| Color | Black |
| Class | Tube amp |
| Networking | No |
| Remote Control | No |
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