SM 155 vs Bowers & Wilkins 683
The 683's sensitivity is 90 dB against the SM 155's 102 dB and its low-frequency extension 38 Hz against 29 Hz. Both share impedance (8Ω) and ways (3).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersFloorstanding SpeakersDiscontinued
Estimated price (community-sourced)
$922.59
Around — community and catalog average, updates slowly
About the SM 155
The Infinity SM 155 is a 3-way, 4-driver loudspeaker system designed for studio monitoring and high-volume applications. It features a 15-inch polypropylene woofer, two 4.5-inch polypropylene midrange drivers, and a 1-inch high output Polycell tweeter with electronic fusion. The speaker has a frequency response range of 29Hz to 27kHz, a sensitivity of 102 dB at 1 watt/1 meter, and an impedance of 8 ohms. It includes crossover frequencies at 500 Hz and 5500 Hz and is recommended to be driven by amplifiers rated between 10 to 300 watts. The cabinet is available in black ash or walnut vinyl finish, measuring approximately 17.75 x 40.25 x 12.5 inches (45 x 102 x 32 cm) and weighing about 30 kg. Originally priced around 1,600 Deutsche Marks per speaker, the SM 155 is noted for its loud, neutral sound and robust bass, making it suitable for both studio and party environments. It also features midrange and high-frequency level adjustments to tailor sound to room acoustics.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 102 dB SPL @ 1W/1m
- Impedance
- 8Ω
- Frequency Response
- 29 Hz - 27 kHz
- Power Handling
- 300W
- Min. Amplifier Power
- 10W
- Max. Amplifier Power
- 300W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 3-way
- Driver Type
- dynamic
- Driver Size
- 15"
- Driver Count
- 4
- Enclosure Type
- ported
- Crossover Frequency
- 500 Hz
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 450 × 1020 × 320 mm (W × H × D)
- Weight
- 30 kg (66 lbs)
- Available Colors
- Black ash, Walnut vinyl
Key Specifications
Sensitivity: 102 dB
Impedance: 8Ω
Frequency: 29-27000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions