D80 vs I/70
The I/70's input sensitivity is 1.3V RMS against the D80's 1.4V RMS and its input impedance 100Ω against 300000Ω. Both share power @ 8ω (70W) and thd (1.000%).
AI-generated product photo — not official manufacturer imagery.
AmplifiersTube AmplifiersPower Amplifiers
Estimated price (community-sourced)
$12,950
Around — community and catalog average, updates slowly
About the D80
The Audio Research D-80 is a classically beautiful stereo power amplifier that replaces the VT80SE, drawing its circuit design from the esteemed Reference 80S. It operates in Pentode mode with a fully balanced differential signal path, using two pairs of KT150 output tubes per channel for robust power, dynamic range, and musicality. Features include auto-bias for output tubes, XLR balanced inputs, 4-8-16 ohm output terminals, and 12V remote trigger. Hand-built in Minnesota, it offers Reference-grade performance including tonal density, bass control, and spatial expansiveness at a more accessible price point. Power output is rated at 70 watts continuous from 20Hz-20kHz, with low distortion and wide bandwidth.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 70W @ 8Ω
- Amplifier Class
- tube
- Minimum Impedance
- 4Ω
- Input Sensitivity
- 1.4V RMS
- Input Impedance
- 300000Ω
Analog Output
Analog signal output specifications
- THD
- 1.000%
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- XLR
Key Specifications
Power: 70W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions