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Fosi Audio GR70 Tube Headphone Amplifier and Preamp

BH #FOGR70ORG • MFR #GR70 ORANGE
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Fosi Audio GR70 Tube Headphone Amplifier and Preamp
Key Features
  • For DACs and Other Playback Media
  • For Consumer and Audiophile Headphones
  • Adjustable Impedance, Bass, and Treble
  • Two 5654W and Two 6Ж4/6Ж8 Vacuum Tubes
With an elegant design and tonal controls onboard, the Fosi Audio GR70 Tube Headphone Amplifier and Preamp brings powerful sound into a desktop format. Powering the GR70's sonic footprint are two replaceable 5654W boost and two 6Ж4/6Ж8 power amp vacuum tubes that drive the input and output stages.
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Fosi Audio GR70 Overview

With an elegant design and tonal controls onboard, the Fosi Audio GR70 Tube Headphone Amplifier and Preamp brings powerful sound into a desktop format. Powering the GR70's sonic footprint are two replaceable 5654W boost and two 6Ж4/6Ж8 power amp vacuum tubes that drive the input and output stages.

A pair of RCA input and outputs are on the rear of the unit, while 3.5mm and 1/4" headphone outputs with an impedance toggle switch are located on the front panel. A large top-mounted volume knob with a damped, smooth potentiometer makes it very easy to control your output stage's level. Lastly, a power supply and tube covers are included to get you up and running with lush sound.

Quad-Tube Dual-Stage Amplification
The GR70 features two 5654 and two 6Ж4/6Ж8 vacuum tubes for creating lush and harmonically-dense audio.
Built for Headphones and Audiophile Equipment
The GR70 acts as both a headphone amp and preamplifier. Whether driving your favorite in-ear monitors or integrating into a larger system, the GR70 brings flexible playback options to the table.
I/O and Tonal Options
Connections in the form of RCA inputs and outputs, along with 3.5mm and 1/4" headphone outputs, allow you to listen with a variety of playback mediums. Bass and treble controls on the front panel let you tailor music playback to your liking.
EAN: 6976136960904

Fosi Audio GR70 Specs

Key Specs
Number of Headphone Channels
2-Channel
Recommended Headphone Impedance
16 to 300 Ohms
Headphone Output Power
Up to 300 mW
Audio I/O
1/8" (3.5 mm) / 1/4" (Headphone)
RCA (I/O)
Digital Audio I/O
No
USB
No
Wireless
No
Power Requirements
DC Input
Form Factor
Tabletop
Number of Headphone Channels
2-Channel
Recommended Headphone Impedance
16 to 300 Ohms
Headphone Output Power
300 mW into 32 Ohms (Max)
Digital Chipset
No
Analog Circuitry
Tube:
EQ
2-Band EQ
Connectivity
Analog Audio I/O
1x 1/4" TRS Unbalanced Headphone Output
1x 1/8" / 3.5 mm TRS Unbalanced Headphone Output
1x Stereo 2RCA Unbalanced Phono Input
1x Stereo 2RCA Unbalanced Phono Output
Digital Audio I/O
No
USB
No
Wireless
No
Performance
Frequency Response
20 Hz to 20 kHz ±1 dB
Dynamic Range
≥ 97 dB
THD+N
≤ 0.26% (RCA)
≤ 0.5% (Phone Out)
SNR
≥ 97 dB
Noise
≤ 20 µV (RCA Out)
56 µV (Headphone)
Crosstalk
-63 dB (RCA Out)
-65 dB (Headphone)
Power
Power Requirements
DC Input
Ground Lift
No
DC Input Power
12 VDC at 3A
Packaging Info
Package Weight
3.225 lb
Box Dimensions (LxWxH)
12.4 x 10.5 x 3.5"

Fosi Audio GR70 Reviews

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