SIT-5 vs Esoteric S05
The S05's power @ 8ω is 30W against the SIT-5's 35W, its thd 0.007% against 0.100%, and its output impedance 8Ω against 0.32Ω. Both share power @ 4ω (60W).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower Amplifiers
Estimated price (community-sourced)
$11,000
Around — community and catalog average, updates slowly
About the SIT-5
The SIT-5 is the latest monoblock amplifier from First Watt, the fifth model employing a Static Induction Transistor (SIT) as the core amplifying device. It uses a Tokin THF51S SIT rated at 600V, 30A, 400W with 50 MHz frequency response, operated in Common-Drain (follower) mode without feedback. The design features a single-ended Class A output stage with a P-channel MOSFET for bias current, push-pull voltage gain stage, custom output transformers, balanced and unbalanced inputs, soft-start power supply, aluminum chassis, and user-adjustable bias. It succeeds models like SIT-1 to SIT-4, offering higher power for less efficient or lower impedance speakers compared to SIT-4.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 35W @ 8Ω
- Power @ 4Ω
- 60W @ 4Ω
- Amplifier Class
- A
- Damping Factor
- 25
- Input Sensitivity
- 1.0V RMS
- Input Impedance
- 100Ω
Analog Output
Analog signal output specifications
- THD
- 0.100%
- Output Impedance
- 0.32Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 430 × 140 × 380 mm (W × H × D)
- Weight
- 14.5 kg (32 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