Short answer: the Audio First Cadentia 3 on measured sound quality, the Polk Signature Elite ES20 on price. The Audio First Cadentia 3 ranks #8 of 130 bookshelf speakers at $7199. The Polk Signature Elite ES20 ranks #69 at $359, $6840 cheaper.
What the Audio First Cadentia 3 offers: Near-textbook measurements - excellent on-axis linearity, listening window, and directivity, with only minor deviations. Extremely low distortion and compression, holding steady even at 102dB with barely any loss. Very wide, consistent horizontal dispersion (~70 degrees) gives a big, enveloping soundstage with strong image specificity outside the speaker boundaries. Strong bass extension for a bookshelf (F3 43Hz, F10 26Hz) with a punchy, guttural mid-bass. Watch for: A mild scoop through the upper midrange/lower treble slightly softens the attack of snares, hand claps, and sibilants - fixable with a single-band EQ (2.5kHz, +1dB, Q~1). High-frequency dispersion narrows quickly above about 4kHz, so off-axis listeners lose some air and detail. Very high asking price for a bookshelf-class speaker, and the complete (finished) version has a long lead time; the loaner kit version ships as an unfinished cabinet you assemble and finish yourself.
What the Polk Signature Elite ES20 offers: A full-size, efficient 6.5-inch bookshelf pair with unusually deep bass for the price. ASR measured 41Hz estimated in-room extension, a well-damped Q of 0.66, broad horizontal coverage to roughly +/-60 degrees and a 5.54 preference score with a subwoofer. Watch for: Predicted in-room smoothness of 0.238 and directivity-index consistency of 3.81 are average rather than class-leading. The deep cabinet needs substantial shelf or stand space, and its Power Port still requires rear clearance.
Buy the Audio First Cadentia 3 when sound quality outweighs the price for you, and the Polk Signature Elite ES20 when the price outweighs sound quality instead.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Audio First Cadentia 3 | Polk Signature Elite ES20 | |
|---|---|---|
| Price | $7199 per pair | $359 per pair |
| Ranked | #8 of 130 in Large Size Bookshelf Speakers | #69 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 26Hz (measured, Erin's Audio Corner) | - |
| Bass Extension (-3dB) | 43Hz (measured, Erin's Audio Corner) | - |
| Dimensions | 23.2" x 11.8" x 17" (590 x 300 x 433 mm) | 14.8H x 8.5W x 13.8D in |
| Impedance | 4 ohms nominal (3.1 ohms minimum, measured by Erin's Audio Corner) | 4/8-ohm compatible |
| Sensitivity | 86.4dB (2.83V/1m, measured by Erin's Audio Corner) | 86dB |
| Drivers | 1.1" tweeter, 4.5" midrange, 9" woofer | 1" Terylene dome tweeter, 6.5" polypropylene woofer |
| Weight | 45.9 lbs (20.8 kg) each | 17 lbs (7.7 kg) each |
| Woofer Cabinet | 3-way, bass reflex | - |
| Country | United Kingdom (Cambridge) | United States (design) |
| Spinorama Preference Score | 7.38 | 3.60 |
| Spinorama Preference Score with Perfect Sub | 8.74 | 5.54 |
| Enclosure | - | 2-way, Power Port bass-reflex |
Related Speaker Comparisons
How Audio First Cadentia 3 compares with other leading options:
- Perlisten S4b vs Audio First Cadentia 3
- Audio First Cadentia 3 vs KEF Reference 1 Meta
- Audio First Cadentia 3 vs GR-Research NX-Studio
- March Audio Sointuva vs Audio First Cadentia 3
- AsciLab C6B vs Audio First Cadentia 3
Prices on this page were last checked September 16, 2026 at 12:41 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Audio First Cadentia 3: $7199 per pair Audio First Designs eBay
Pros: Near-textbook measurements - excellent on-axis linearity, listening window, and directivity, with only minor deviations. Extremely low distortion and compression, holding steady even at 102dB with barely any loss. Very wide, consistent horizontal dispersion (~70 degrees) gives a big, enveloping soundstage with strong image specificity outside the speaker boundaries. Strong bass extension for a bookshelf (F3 43Hz, F10 26Hz) with a punchy, guttural mid-bass. Measured bass extension of 43Hz (-3dB), with a measured sensitivity of 86.4dB.
Cons: A mild scoop through the upper midrange/lower treble slightly softens the attack of snares, hand claps, and sibilants - fixable with a single-band EQ (2.5kHz, +1dB, Q~1). High-frequency dispersion narrows quickly above about 4kHz, so off-axis listeners lose some air and detail. Very high asking price for a bookshelf-class speaker, and the complete (finished) version has a long lead time; the loaner kit version ships as an unfinished cabinet you assemble and finish yourself.
Full Audio First Cadentia 3 review and specifications →
| Bass Extension (-10dB) | 26Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 43Hz (measured, Erin's Audio Corner) |
| Country | United Kingdom (Cambridge) |
| Dimensions | 23.2" x 11.8" x 17" (590 x 300 x 433 mm) |
| Drivers | 1.1" tweeter, 4.5" midrange, 9" woofer |
| Impedance | 4 ohms nominal (3.1 ohms minimum, measured by Erin's Audio Corner) |
| Sensitivity | 86.4dB (2.83V/1m, measured by Erin's Audio Corner) |
| Spinorama Preference Score | 7.38 |
| Spinorama Preference Score with Perfect Sub | 8.74 |
| Weight | 45.9 lbs (20.8 kg) each |
| Woofer Cabinet | 3-way, bass reflex |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Audio First Cadentia 3 vs AsciLab C6B
- Audio First Cadentia 3 vs March Audio Sointuva
- Audio First Cadentia 3 vs KEF R3 Meta
- Audio First Cadentia 3 vs KEF Q Concerto Meta
- Audio First Cadentia 3 vs GR-Research NX-Studio
- Audio First Cadentia 3 vs Wharfedale Aura 2
- Audio First Cadentia 3 vs KEF Reference 1 Meta
- Audio First Cadentia 3 vs Perlisten S4b
- See all 45 comparisons
Polk Signature Elite ES20: $359 per pair B&H Photo Video eBay
Pros: A full-size, efficient 6.5-inch bookshelf pair with unusually deep bass for the price. ASR measured 41Hz estimated in-room extension, a well-damped Q of 0.66, broad horizontal coverage to roughly +/-60 degrees and a 5.54 preference score with a subwoofer.
Cons: Predicted in-room smoothness of 0.238 and directivity-index consistency of 3.81 are average rather than class-leading. The deep cabinet needs substantial shelf or stand space, and its Power Port still requires rear clearance.
Full Polk Signature Elite ES20 review and specifications →
| Country | United States (design) |
|---|---|
| Dimensions | 14.8H x 8.5W x 13.8D in |
| Drivers | 1" Terylene dome tweeter, 6.5" polypropylene woofer |
| Enclosure | 2-way, Power Port bass-reflex |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB |
| Spinorama Preference Score | 3.60 |
| Spinorama Preference Score with Perfect Sub | 5.54 |
| Weight | 17 lbs (7.7 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Polk Signature Elite ES20 vs Ascend CBM-170 SE2
- Polk Signature Elite ES20 vs Klipsch RP-600M II
- Polk Signature Elite ES20 vs Dynaudio Emit 20
- Polk Signature Elite ES20 vs Philharmonic BMR Monitor
- Polk Signature Elite ES20 vs Dynaudio Contour 20i
- Polk Signature Elite ES20 vs Mission LX-3 MKII
- Polk Signature Elite ES20 vs ELAC DBR62
- Polk Signature Elite ES20 vs GR-Research X-LS Encore
- See all 44 comparisons