M40.3 XD vs ATC SCM50SL AT
The SCM50SL AT's sensitivity is 85 dB against the M40.3 XD's 86 dB, its impedance 8Ω against 7Ω, and its low-frequency extension 40 Hz against 35 Hz. Both share ways (3).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersFloorstanding Speakers
Estimated price (community-sourced)
$13,400 - $20,990
Around — community and catalog average, updates slowly
About the M40.3 XD
The Harbeth 40.3 XD is a floor-standing speaker known for its detailed sound and dynamic performance. It features a 3-way vented design with a 12-inch bass driver, an 8-inch midrange driver using Harbeth's patented RADIAL2 material, and a 1-inch ferrofluid-cooled tweeter. The speaker has a frequency response of 35Hz to 20kHz ±3dB and an impedance of 6-8 ohms, making it relatively easy to drive with a recommended amplifier power of at least 35W per channel. It is available in various finishes, including Cherry, Eucalyptus, Rosewood, and Tiger Ebony. The dimensions are approximately 750 x 432 x 388 mm, and each speaker weighs about 38 kg without packaging. For optimal performance, it is recommended to place the speakers away from walls to minimize boundary effects.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 86 dB SPL @ 1W/1m
- Impedance
- 7Ω
- Frequency Response
- 35 Hz - 20 kHz
- Power Handling
- 35W
- Min. Amplifier Power
- 35W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 3-way
- Driver Type
- dynamic
- Driver Size
- 12"
- Driver Count
- 3
- Enclosure Type
- ported
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 432 × 750 × 388 mm (W × H × D)
- Weight
- 38 kg (84 lbs)
- Available Colors
- Cherry, Rosewood, Walnut, Exotic Ash
Key Specifications
Sensitivity: 86 dB
Impedance: 7Ω
Frequency: 35-20000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions