Specification AmplifierType : Solid State Brand : Fosi Audio BulletPoint1 : 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 BulletPoint2 : Quad Tubes: Features two 5654W and two 6AC7 vacuum tubes for two-stage amplification. The 5654W tubes boost voltage, while the 6AC7 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound BulletPoint3 : User-Friendly Design: This tube headphone amp preamplifier offers intuitive controls, including a large volume knob, dual-side ventilation holes, bass & treble controls, high and low impedance mode switching, making it versatile enough BulletPoint4 : Two-in-One: It supports low and high impedance modes switching 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 HiFi system integration BulletPoint5 : 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 Color : Black CompatibleDevices : all ConnectorType : RCA IncludedComponents : Fosi Audio GR70 IncludedComponents1 : Preamp IncludedComponents2 : USB Cable IncludedComponents3 : Manual ItemName : Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini HiFi Preamplifier for Home Audio, 3.5mm & 6.35mm Jacks Supporting 16-300 ohms Impedance ItemPackageDimensions_Height : 26.0096 centimeters ItemPackageDimensions_Length : 6.2992 centimeters ItemPackageDimensions_Width : 18.5928 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : audio-component-preamplifiers Manufacturer : Shenzhen Foresight Technology Co., Ltd. Material : Aluminum, Metal ModelName : T13 ModelNumber : GR70 NumberOfItems : 1 NumberOfLithiumMetalCells : 1 OutputChannelQuantity : 3 PartNumber : GR40 PowerSourceType : USB Powered ProductDescription : 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 ProductSiteLaunchDate : 2024-11-05T08:24:08.855Z Size : 11.00X7.50X3.20CM SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 52161547 WarrantyDescription : 24 Months Manufacturer