AI-generated product photo — not official manufacturer imagery.
770R with Tube Phono Section
Granite AudioAmplifiersPhono Pre-AmpsTube AmplifiersDiscontinued
Estimated price (community-sourced)
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About the 770R with Tube Phono Section
Granite Audio 770R is a tube stereo preamplifier with an all-tube phono section. The available information indicates it was sold as the 770/770R model line, with the 770R adding remote volume control in later versions. Granite described it as an extremely quiet preamp with a phono stage that is effectively the centerpiece of the design.
Specifications
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- tube
Phono Preamplifier
Phono stage specifications
- Adjustable Loading
- Yes
- Loading Options
- 0.1Ω, 100000Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
Never published
- Analog Output — the maker never published this. Checked 15 sources on 7 Sept 2026
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions