KEF 991CI160QR vs Polk Audio 107ATR8SDW
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Choosing between the KEF 991CI160QR and Polk Audio 107ATR8SDW? Both compete in the Speaker (L/R) segment. Here’s how they compare across the specs that matter most for your home theater.
Pricing for both models is currently unavailable. Check the retailer links below for current deals.
Looking at overall performance dimensions: The KEF 991CI160QR scores higher in form factor, room fit. The Polk Audio 107ATR8SDW leads in value, audio quality, volume/SPL.
For speaker performance, the Polk Audio 107ATR8SDW is more sensitive at 91 dB vs 89 dB. Higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks. A speaker rated 3 dB higher in sensitivity needs half the amplifier power to reach the same volume.
These two Speaker (L/R) options trade wins across different dimensions. The right choice depends on which specs matter most for your room and listening preferences — review the detailed table below to decide.
For most home theaters, the Polk Audio 107ATR8SDW is the stronger choice — it leads in 3 of 5 scored dimensions. The KEF 991CI160QR makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
KEF 991CI160QR
Polk Audio 107ATR8SDW
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Config | 2-way | 2-way (dual voice coil, single stereo input) |
| Sensitivity | 89dB | 91dB |
| Impedance | 8Ω | 8Ω |
| Freq Response Low | 38Hz | 45Hz |
| Freq Response High | 34000Hz | 27000Hz |
| Crossover | 3000Hz | — |
| Bi-Amp Capable | No | No |
| Rec. Power Min | 10W | 10W |
| Rec. Power Max | 125W | 125W |
| Mounting Type | in-ceiling | outdoor |
| Mounting Depth | 3.58" | — |
| Cutout Diameter | 7.71" | — |
| Cutout Width | — | — |
| Cutout Height | — | — |
| Wall Thickness Min | 0.24" | — |
| Wall Thickness Max | 1.42" | — |
| Back Box Included | No | No |
| Back Box Required | No | No |
| Mounting Mechanism | — | — |
| Installation Type | — | — |
| Stud Spacing | — | — |
| Paintable Grille | No | No |
| Magnetic Grille | No | No |
| Grille Shape | — | — |
| Connector Type | — | — |
| Wire Gauge Max | — | — |
| Angle Adjustable | No | No |
| Pivot Angle | — | — |
| Treble Attenuation Switch | No | No |
| LCR Capable | No | No |
| Coaxial | No | No |
| IP Rating | — | — |
| Moisture Resistant | No | Yes |
| UV Resistant | No | Yes |
| Salt Spray Rated | No | No |
| Enclosure Material | — | — |
| Grille Material | — | — |
| Bracket Type | — | Speed-Lock swivel |
| Bracket Included | No | Yes |
| Dual Voice Coil (SDI) | No | No |
Key Differences
- Freq Response High: KEF 991CI160QR at 34000Hz vs Polk Audio 107ATR8SDW at 27000Hz
- Freq Response Low: KEF 991CI160QR at 38Hz vs Polk Audio 107ATR8SDW at 45Hz. Determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support.
- Sensitivity: KEF 991CI160QR at 89dB vs Polk Audio 107ATR8SDW at 91dB. Higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks. A speaker rated 3 dB higher in sensitivity needs half the amplifier power to reach the same volume.
- Driver Config: KEF 991CI160QR at 2-way vs Polk Audio 107ATR8SDW at 2-way (dual voice coil, single stereo input). 3-way speakers use dedicated drivers for bass, midrange, and treble, reducing crossover interference. Coaxial designs (KEF Uni-Q) mount the tweeter inside the woofer for better time-alignment.
- Crossover: KEF 991CI160QR at 3000Hz vs Polk Audio 107ATR8SDW at —
Which Should You Choose?
Choose KEF 991CI160QR if you want:
- + better freq response low — determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support
Choose Polk Audio 107ATR8SDW if you want:
- + better sensitivity — higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks
See Where These Rank
Check our editorial rankings to see how KEF 991CI160QR and Polk Audio 107ATR8SDW compare to the rest of the field.
Best Speaker (L/R) RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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