ProLogue Four vs Shanling STP-80
The STP-80's signal-to-noise is 95 dB against the ProLogue Four's 89 dB. Both share power @ 8ω (35W), power @ 4ω (35W), and thd (1.000%).
AI-generated product photo — not official manufacturer imagery.
AmplifiersTube AmplifiersPower AmplifiersDiscontinued
About the ProLogue Four
The PrimaLuna ProLogue Four is a stereo tube power amplifier delivering 35 watts per channel from a tube complement of four EL34, two 12AX7, and two 12AU7 tubes. It shares the basic circuit topology of the ProLogue One integrated amplifier but with revised driver and phase splitter stages that allow operation without global negative feedback for more natural tonality. Features include PrimaLuna's Adaptive AutoBias for automatic bias management, a soft-start circuit for tube longevity, individual tube plate fuses for output stage protection, 4 and 8 ohm speaker taps, and a frequency response of 20 Hz to 85 kHz (+/-0.5 dB). Construction features point-to-point hand wiring, a heavy-gauge steel chassis, toroidal power transformer, custom encapsulated output transformers, ceramic tube sockets, and gold-plated RCA input jacks. The ProLogue Four is a discontinued model from PrimaLuna's original ProLogue series.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 35W @ 8Ω
- Power @ 4Ω
- 35W @ 4Ω
- Amplifier Class
- tube
Analog Output
Analog signal output specifications
- THD
- 1.000%
- SNR
- 89 dB
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 279.4 × 190.5 × 393.7 mm (W × H × D)
- Weight
- 17.01 kg (38 lbs)
Key Specifications
Power: 35W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions