Bowers & Wilkins 603 S3 vs MartinLogan Motion XT F100
The Bowers & Wilkins 603 S3 is an easier load for a receiver (8 Ω vs 4 Ω). The MartinLogan Motion XT F100 is more sensitive (92 dB vs 90 dB), so it plays louder per watt, plays lower (31 Hz vs 46 Hz) and costs less ($2,500 vs $2,700).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| 603 S3 | Motion XT F100 | |
|---|---|---|
| Receivers and amps that drive it | 29 of 29 | 28 of 29, 14 after a setting change |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| 603 S3 | Motion XT F100 | |
|---|---|---|
| Impedance | 8 Ω | 4 Ω |
| Sensitivity | 90 dB (2.83 V, 1 m) | 92 dB |
| Low end | 46 Hz | 31 Hz |
| Drivers | 1 × 25 mm, 1 × 150 mm, 2 × 165 mm | 1 × 32 mm, 1 × 165 mm, 3 × 165 mm |
| Size | 10×40×16 in | 13×48×15 in |
| Recommended amplifier power | 30–200 W | 20–450 W |
| Weight | 27.5 kg (60.6 lb) | 34.5 kg (76.1 lb) |
| MSRP | $2,700 a pair (MSRP, September 2026) | $2,500 each (MSRP, September 2026) |
Every spec and pairing: Bowers & Wilkins 603 S3, MartinLogan Motion XT F100.
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References
- Bowers & Wilkins 603 S3: Spec sheet, bowerswilkins.com, retrieved September 15, 2026
- Bowers & Wilkins 603 S3: Manufacturer product page, bowerswilkins.com, retrieved September 15, 2026
- MartinLogan Motion XT F100: Spec sheet, martinlogan.com, retrieved September 15, 2026
- MartinLogan Motion XT F100: Retailer listing, audioadvice.com, retrieved September 15, 2026
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