Short answer: both are discontinued, so this only matters if you are buying used. Used, the Revel M55XC is the better pick: it ranks #5 of 13 outdoor speakers by sound quality (rated 3.6/5), against #6 (rated 3.4/5) for the RSL Outsider II.
Why pick the Revel M55XC: Audio Science Review measurements demonstrate a 3.36 preference score that leaps to 6.89 with a subwoofer. The tradeoff: Compact sealed enclosure limits bass output, with -6dB extension at 90.8Hz and rapid low-frequency roll-off below 100Hz.
The RSL Outsider II is the deeper-bass choice. Scores 2.93 on spinorama (6.07 with subwoofer) tested on Klippel NFS. Its bass reaches about 87.9Hz before falling 3dB, against 112.8Hz for the Revel M55XC. The catch: Modest sensitivity and limited dynamic ceiling at high listening levels outdoor.
Buy the Revel M55XC only if you find one used in good condition; both are discontinued, and it is the better rated of the two.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Revel M55XC | RSL Outsider II | |
|---|---|---|
| Price | $420 per pair Discontinued | $300 per pair Discontinued |
| Ranked | #5 of 13 in Outdoor Speakers | #6 of 13 in Outdoor Speakers |
| Drivers | 5.25” carbon-infused polypropylene woofer, 1” aluminum dome tweeter with Acoustic Lens waveguide | 6.5” mineral-filled polypropylene cone woofer, 1” silk dome tweeter |
| Configuration | Passive 2-way | Passive 2-way |
| Sensitivity | 86.5dB | 88dB |
| Impedance | 8 ohms | 8 ohms |
| Recommended Power | 20-70W | 25-100W |
| Enclosure | Sealed, IP56 weather-resistant | Sealed all-weather composite enclosure |
| Dimensions | 9.8”H x 7.4”W x 7.1”D (248 x 188 x 181 mm) | 12.5”H x 7.8”W x 7.2”D (318 x 197 x 184 mm) |
| Weight | 7.5 lbs (3.4 kg) | 7.1 lbs (3.2 kg) |
| Bass Extension (-3dB) | 112.8Hz (measured, Audio Science Review) | 87.9Hz (measured, Audio Science Review) |
| Bass Extension (-6dB) | 90.8Hz (measured, Audio Science Review) | 74.7Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 67.4Hz (measured, Audio Science Review) | 54.2Hz (measured, Audio Science Review) |
| Spinorama Preference Score | 3.36 | 2.93 |
| Spinorama Preference Score with Perfect Sub | 6.89 | 6.07 |
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The Two Speakers In Full
Revel M55XC: $420 per pair Discontinued eBay
Pros: Audio Science Review measurements demonstrate a 3.36 preference score that leaps to 6.89 with a subwoofer. Smooth off-axis response and tight directivity matching through the crossover handover thanks to Revel’s Acoustic Lens waveguide. Rugged IP56 weather resistance and included InvisiBall mounting hardware make installation straightforward. Measured bass extension of 112.8Hz (-3dB).
Cons: Compact sealed enclosure limits bass output, with -6dB extension at 90.8Hz and rapid low-frequency roll-off below 100Hz. Modest 86.5dB sensitivity means it requires a capable amplifier for open outdoor spaces. Discontinued.
Full Revel M55XC review and specifications →
| Bass Extension (-10dB) | 67.4Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 112.8Hz (measured, Audio Science Review) |
| Bass Extension (-6dB) | 90.8Hz (measured, Audio Science Review) |
| Configuration | Passive 2-way |
| Dimensions | 9.8”H x 7.4”W x 7.1”D (248 x 188 x 181 mm) |
| Drivers | 5.25” carbon-infused polypropylene woofer, 1” aluminum dome tweeter with Acoustic Lens waveguide |
| Enclosure | Sealed, IP56 weather-resistant |
| Impedance | 8 ohms |
| Recommended Power | 20-70W |
| Sensitivity | 86.5dB |
| Spinorama Preference Score | 3.36 |
| Spinorama Preference Score with Perfect Sub | 6.89 |
| Weight | 7.5 lbs (3.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RSL Outsider II: $300 per pair Discontinued eBay
Pros: Scores 2.93 on spinorama (6.07 with subwoofer) tested on Klippel NFS. Neutral listening window across the midrange and wider vertical coverage than typical 2-way budget competitors. Reaches 74.7Hz at -6dB with clean low-end transition. Measured bass extension of 87.9Hz (-3dB).
Cons: Modest sensitivity and limited dynamic ceiling at high listening levels outdoor. Cabinet and bracket feel somewhat lightweight, and the model has been discontinued by RSL.
Full RSL Outsider II review and specifications →
| Bass Extension (-10dB) | 54.2Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 87.9Hz (measured, Audio Science Review) |
| Bass Extension (-6dB) | 74.7Hz (measured, Audio Science Review) |
| Configuration | Passive 2-way |
| Dimensions | 12.5”H x 7.8”W x 7.2”D (318 x 197 x 184 mm) |
| Drivers | 6.5” mineral-filled polypropylene cone woofer, 1” silk dome tweeter |
| Enclosure | Sealed all-weather composite enclosure |
| Impedance | 8 ohms |
| Recommended Power | 25-100W |
| Sensitivity | 88dB |
| Spinorama Preference Score | 2.93 |
| Spinorama Preference Score with Perfect Sub | 6.07 |
| Weight | 7.1 lbs (3.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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