Short answer: the Polk Audio Atrium 4, if you are buying new. The RSL Outsider II ranks higher than it (#6 vs #11 of 13 outdoor speakers, 3.4/5 vs 2.6/5) but is discontinued, so only consider it used; the Polk Audio Atrium 4 is still sold new at $117.
The RSL Outsider II is the more accurate, deeper-bass choice. Scores 2.93 on spinorama (6.07 with subwoofer) tested on Klippel NFS. Its measured preference score, a predictor of how neutral it sounds, is 2.93 against 1.46 for the Polk Audio Atrium 4. Its bass reaches about 87.9Hz before falling 3dB, against 112.8Hz for the Polk Audio Atrium 4. Watch for: Modest sensitivity and limited dynamic ceiling at high listening levels outdoor.
What the Polk Audio Atrium 4 does well: Extremely compact, lightweight (1.63 kg), and affordable outdoor pair with Speed-Lock quick mounting bracket. Watch for: Small 4.5” driver restricts low-end performance; bass extension drops steeply past 98Hz (-6dB) with little acoustic energy below 100Hz.
Buy the Polk Audio Atrium 4 new; the RSL Outsider II is no longer sold new, so it only makes sense as a used find.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| RSL Outsider II | Polk Audio Atrium 4 | |
|---|---|---|
| Price | $300 per pair Discontinued | $117.00 per pair |
| Ranked | #6 of 13 in Outdoor Speakers | #11 of 13 in Outdoor Speakers |
| Drivers | 6.5” mineral-filled polypropylene cone woofer, 1” silk dome tweeter | 4.5” (114mm) mineral-filled polymer cone woofer, 0.75” (19mm) anodized aluminum dome tweeter with neodymium magnet |
| Configuration | Passive 2-way | Passive 2-way |
| Sensitivity | 88dB | 89dB |
| Impedance | 8 ohms | 8 ohms |
| Recommended Power | 25-100W | 10-80W |
| Enclosure | Sealed all-weather composite enclosure | Sealed all-weather Mineral-filled polypropylene |
| Dimensions | 12.5”H x 7.8”W x 7.2”D (318 x 197 x 184 mm) | 8.6”H x 5.7”W x 6.6”D (219 x 144 x 168 mm) |
| Weight | 7.1 lbs (3.2 kg) | 3.6 lbs (1.63 kg) |
| Bass Extension (-3dB) | 87.9Hz (measured, Audio Science Review) | 112.8Hz (measured, Audio Science Review) |
| Bass Extension (-6dB) | 74.7Hz (measured, Audio Science Review) | 98.1Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 54.2Hz (measured, Audio Science Review) | 74.7Hz (measured, Audio Science Review) |
| Spinorama Preference Score | 2.93 | 1.46 |
| Spinorama Preference Score with Perfect Sub | 6.07 | 5.10 |
Related Speaker Comparisons
How RSL Outsider II compares with other leading options:
- JBL Control X Wireless vs RSL Outsider II
- Revel M80XC vs RSL Outsider II
- Focal Chorus OD 706 V vs RSL Outsider II
- Focal 100 OD6 vs RSL Outsider II
- Revel M55XC vs RSL Outsider II
Prices on this page were last checked October 4, 2026 at 9:58 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
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
Polk Audio Atrium 4: $117.00 per pair Amazon eBay
Pros: Extremely compact, lightweight (1.63 kg), and affordable outdoor pair with Speed-Lock quick mounting bracket. Clean build quality that easily survives harsh rain and sun exposure. Smooth dispersion pattern (+60/-70 degrees horizontal). Measured bass extension of 112.8Hz (-3dB).
Cons: Small 4.5” driver restricts low-end performance; bass extension drops steeply past 98Hz (-6dB) with little acoustic energy below 100Hz. Notable mid-treble shelf gives it a forward, bright presentation and yields a low 1.46 preference score.
Full Polk Audio Atrium 4 review and specifications →
| Bass Extension (-10dB) | 74.7Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 112.8Hz (measured, Audio Science Review) |
| Bass Extension (-6dB) | 98.1Hz (measured, Audio Science Review) |
| Configuration | Passive 2-way |
| Dimensions | 8.6”H x 5.7”W x 6.6”D (219 x 144 x 168 mm) |
| Drivers | 4.5” (114mm) mineral-filled polymer cone woofer, 0.75” (19mm) anodized aluminum dome tweeter with neodymium magnet |
| Enclosure | Sealed all-weather Mineral-filled polypropylene |
| Impedance | 8 ohms |
| Recommended Power | 10-80W |
| Sensitivity | 89dB |
| Spinorama Preference Score | 1.46 |
| Spinorama Preference Score with Perfect Sub | 5.10 |
| Weight | 3.6 lbs (1.63 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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