1. The Ultimate Desktop Audio Command Center The Fosi Audio GR40 is a sophisticated 2.1 channel integrated amplifier designed to... Read more
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The Fosi Audio GR40 is a sophisticated 2.1 channel integrated amplifier designed to be the definitive hub for your desktop Hi-Fi system. Combining the nostalgic charm of a classic VU meter with the precision of modern digital-to-analog conversion, the GR40 provides a high-power, low-noise solution for driving both passive speakers and active subwoofers.
Active VU Meter: The front panel features a large, precision-calibrated VU meter that provides a warm, analog visual to your digital music, making your desktop setup look as good as it sounds.
All-in-One Connectivity: With Bluetooth 5.0, Optical, Coaxial, and USB inputs, the GR40 connects seamlessly to your smartphone, TV, PC, or gaming console.
Built-in High-End DAC: The internal decoding stage supports high-resolution audio files, ensuring every detail is preserved from the digital source to your ears.
Authoritative Power: Driven by the high-efficiency TPA3255 core, it delivers a clean 100W x2 (@4Ω), providing effortless dynamics for bookshelf or floor-standing speakers.
Subwoofer Pre-out: Designed for deep-bass lovers, the GR40 includes a dedicated active subwoofer output. Easily build a powerful 2.1 channel system for an immersive home theater or gaming experience.
Precision Tone Tuning: Use the tactile Bass and Treble knobs to customize the frequency response, ensuring the perfect sound signature for any room or genre.
| Component | Specification |
| Amplifier Chip | Texas Instruments TPA3255 |
| Power Output | 100W x2 @4Ω |
| Digital Inputs | Bluetooth 5.0, Optical, Coaxial, USB |
| Analog Inputs | RCA |
| Outputs | Passive Speakers + Active Subwoofer Out |
| SNR / THD | ≥ 105dB / ≤ 0.01% |
| Chassis | CNC Machined Aluminum |
The Fosi Audio GR40 (Note: ID used for illustrative purposes) represents the perfect balance of style and substance. It eliminates the need for multiple stacks of gear by combining a DAC, a preamp, and a power amp into one elegant unit. Whether you're an audiophile looking for a clean desktop solution or a movie enthusiast wanting to upgrade TV audio, the GR40 delivers a premium, immersive experience.
The GR40 supports USB, optical, coaxial, and Bluetooth inputs, making it compatible with a wide range of audio sources. The device includes input mode indicators for easy selection. With high-resolution DSD support, it delivers exceptional sound quality.
1.Input: Bluetooth, USB, Optical, Coaxial
2.Output: RCA, 3.5mm Headphone Output
3.SNR≥103dB；THD＜0.03%；Power Supply: 12V 1.5A;
4.Bluetooth Codecs: SBC, AAC, aptX, aptX HD, aptX LL
Unlocking More Details
Ensures precise signal conversion, reducing distortion and delivering clean
Supporting high-quality formats for a stable, lossless music experience
Combining the vintage tube warmth and modern efficiency in one compact unit
We've added bass, treble adjustment,
and bluetooth connectivity for exceptional sound quality.
Featuring a minimalist and durable design.
Compatible tubes: 5654W, 6AK5, 6AK5W, 6Zh1P, 6J1, 6J1P,
WE-403A, 403B, EF95, and other 7-pin tubes.
With 53V Working Voltage
It unleashes the potential of its vacuum tubes, delivering richer sound and greater tonal depth.
Quickly Switch
With settings automatically restoring to the previous state upon restart.
Long press the Bluetooth reset button for 3 seconds; the Bluetooth indicator will flash, and the GR40 will enter pairing mode. Simply re-pair your device.
The GR40 defaults to headphone priority output. To use RCA output, disconnect the headphones.
Tubes such as EF95, 6Ak5, 6AK5W, 403A/403B, 6J1, 6J1P, 6J2, 6J3, 6J4, 6J5 are compatible. You can test and choose according to your personal preference.
