Description
Pure Tube-Amplification
The GR70 headphone tube amp combines vintage charm with modern tech, delivering authentic tube essence. Perfect for headphone enthusiasts, it pairs excellently with over-ear and in-ear headphones for superior audio.
Quad Tubes
Features two 5654W and two 6Ж4 vacuum tubes for two-stage amplification. The 5654W tubes boost voltage, while the 6Ж4 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound.
User-Friendly Design
This tube headphone amp preamplifier offers intuitive controls, including a large volume knob, dual-side ventilation holes, bass & treble controls, and high/low impedance mode switching—making it versatile enough for various setups.
Two-in-One
It supports low and high impedance modes to adapt 16Ω–300Ω headphones, and features 6.35mm / 3.5mm headphone jacks on the front and RCA input/output on the rear for home audio Hi-Fi system integration.
Compact Yet Powerful
Crafted with a CNC-machined aluminum alloy body, the GR70 is both durable and refined. Despite its compact size, it delivers up to 300mW power output and 1.2V RCA output with SNR ≥97dB, offering warm, clean, and dynamic sound.
Specifications
| Specification | Detail |
|---|---|
| Input | RCA |
| Output | RCA, 6.35mm / 3.5mm Headphone Output |
| Max Power Output | 300mW @ 32Ω |
| Power Input | DC 12V / 3A |
| Headphone Impedance | Low Mode: 16Ω–120Ω; High Mode: 120Ω–300Ω |
| SNR | ≥ 97dB |
| THD | RCA Out: ≤ 0.26%; Phone Out: ≤ 0.5% |
| Frequency Range | 20Hz – 20kHz (±1dB) |
| Tubes | 5654W (×2), 6AC7 / 6Ж4 (×2) |
| Amplification | Two-stage tube amplification design |
| Features | Can be integrated into a home audio system with multiple headphone jacks and RCA input/output options |
