Short answer: the Polk Signature Elite ES20. It ranks #119 of 222 bookshelf speakers by sound quality (rated 3.7/5); the Mission LX-3 MKII ranks #138 (rated 3.6/5).
The Polk Signature Elite ES20 is the deeper-bass pick. Large, efficient bookshelf speakers with unusually deep bass for the price and wide horizontal coverage. Its bass reaches about 55.7Hz before falling 3dB, against 67.4Hz for the Mission LX-3 MKII. Watch for: Predicted in-room smoothness of 0.238 and directivity-index consistency of 3.81 are average rather than class-leading.
Why pick the Mission LX-3 MKII: Large affordable standmount speakers with a 6.5 inch woofer, useful bass and easy to drive sensitivity. The catch: On-axis smoothness of 0.217 and predicted in-room smoothness of 0.344 reveal clear response unevenness, with a -0.46dB-per-octave downward tilt.
Buy the Polk Signature Elite ES20. It is rated higher for sound quality than the Mission LX-3 MKII.
Still deciding? The full Passive Home rankings cover every ranked option.
Large, efficient bookshelf speakers with unusually deep bass for the price and wide horizontal coverage.
Large affordable standmount speakers with a 6.5 inch woofer, useful bass and easy to drive sensitivity.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Polk Signature Elite ES20 | Mission LX-3 MKII | |
|---|---|---|
| Price | $398.98 per pair | £249 per pair |
| Ranked | #119 of 222 in Large Size Bookshelf Speakers | #138 of 222 in Large Size Bookshelf Speakers |
| Enclosure | 2-way, Power Port bass-reflex | 2-way, bass-reflex |
| Drivers | 1” Terylene dome tweeter, 6.5” polypropylene woofer | 1” microfiber-dome tweeter, 6.5” composite-fiber woofer |
| Dimensions | 14.8H x 8.5W x 13.8D in | 13.6H x 8.9W x 12.1D in |
| Weight | 17 lbs (7.7 kg) each | 18.5 lbs (8.4 kg) each |
| Sensitivity | 86dB | 88dB |
| Impedance | 4/8-ohm compatible | 8 ohms nominal, 4.1 ohms minimum |
| Country | United States (design) | United Kingdom (design) |
| Spinorama Preference Score | 4.49 | 4.17 |
| Spinorama Preference Score with Perfect Sub | 6.44 | 6.42 |
| Bass Extension (-3dB) | 55.7Hz (measured, ASR via spinorama.org) | 67.4Hz (measured, ASR via spinorama.org) |
| Bass Extension (-10dB) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) | 42.5Hz (derived from ASR on-axis curve, spinorama.org) |
| DIY Kit | No | No |
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