VTF-3 MK3 vs Sumiko S.9
The S.9's low-frequency extension is 25 Hz against the VTF-3 MK3's 18 Hz, its woofer 10" against 12", and its high-frequency extension 120 Hz against 25 kHz. Both share power @ 8ω (350W).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersSubwoofersPowered LoudspeakersDiscontinued
About the VTF-3 MK3
The Hsu Research VTF-3 MK3 subwoofer is a well-engineered powered subwoofer with a 12-inch nominal driver and a 350-watt RMS Class-AB amplifier with tracking power supply. It features a dual 4-inch flared port design, a continuously variable low pass filter from 30 Hz to 90 Hz with a 4th order (24 dB/octave) crossover slope, and a switchable phase control (0° or 180°). The subwoofer offers line-level and speaker-level inputs and outputs, a 3-way power switch (On/Auto/Off), and a switch to select between maximum extension or maximum output modes. The enclosure measures 17" W x 22" H x 25" D and weighs 90 lbs. It is available in black or maple finish with a black grille and includes video shielding for placement near TVs. The unit is praised for its clean output, excellent bass extension for its size, and solid build quality. It comes with a 7-year warranty on the driver and cabinet and a 2-year warranty on the amplifier. The VTF-3 MK3 is regarded as a top-flight subwoofer offering excellent value and performance for music and home theater enthusiasts.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 90 dB SPL @ 1W/1m
- Impedance
- 4Ω
- Frequency Response
- 18 Hz - 25 kHz
- Power Handling
- 350W
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 350W @ 8Ω
- Amplifier Class
- AB
- Input Sensitivity
- 2.8V RMS
Speaker Design
Driver configuration and enclosure design
- Driver Type
- dynamic
- Driver Size
- 12"
- Driver Count
- 1
- Enclosure Type
- ported
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- line-level, speaker-level
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 431.8 × 558.8 × 635 mm (W × H × D)
- Weight
- 40.82 kg (90 lbs)
- Available Colors
- Black, Maple
Key Specifications
Sensitivity: 90 dB
Impedance: 4Ω
Power: 350W
Frequency: 18-25000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions