Smart 845 vs S8
The S8's power @ 8ω is 24W against the Smart 845's 23W, its output impedance 4Ω against 6Ω, and its input impedance 100000Ω against 47Ω. Both share class (A).
AI-generated product photo — not official manufacturer imagery.
Smart 845
Unison ResearchAmplifiersPower AmplifiersTube AmplifiersDiscontinued
Estimated price (community-sourced)
$2,600
Around — community and catalog average, updates slowly
About the Smart 845
The Unison Research Smart 845 is a monoblock tube power amplifier designed for audiophiles seeking the unique sonic qualities of the 845 direct-heated triode. Handcrafted in Italy, the Smart 845 combines elegant solid cherry woodwork with robust engineering. It delivers a dynamic, harmonically rich sound with excellent resolution and musicality, making it a favorite among enthusiasts of single-ended triode (SET) designs. The amplifier is praised for its ability to provide both headroom and low-end control, while retaining the warmth and richness associated with classic tube amplification. Its construction quality and attention to detail reflect Unison Research’s commitment to high-fidelity audio and timeless design.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 23W @ 8Ω
- Amplifier Class
- A
- Minimum Impedance
- 6Ω
- Input Impedance
- 47Ω
Analog Output
Analog signal output specifications
- Output Impedance
- 6Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
- Analog Outputs
- Speaker binding posts
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 304.8 × 203.2 × 571.5 mm (W × H × D)
- Weight
- 30.5 kg (67 lbs)
- Available Colors
- Solid cherry wood
Key Specifications
Power: 23W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions