Short answer: the Polk Audio XT15. It ranks #28 of 71 bookshelf speakers by sound quality at $179; the Q Acoustics 3020i ranks #54 and costs $314.99, so there is not much of a tradeoff to weigh.
What the Q Acoustics 3020i offers: UK-designed (Finkteam) with attractive styling, including recessed binding posts and custom connectors. Vertical directivity is good enough that the tweeter doesn’t need to be exactly at ear level. With EQ correction, especially high-frequency shelving and a sub-40Hz high-pass filter, Amir found performance “improves substantially.” Watch for: On-axis response shows a rising upper-frequency trend and a dip in the 2-4kHz crossover region alongside two resonance-related dips; a significant resonance appears at 366Hz in the waterfall plot. Horizontal directivity is narrow and uneven due to a woofer/tweeter beamwidth mismatch. Amir cautions the speaker is “merely a distortion generator” if played too low, and its low impedance demands a quality amplifier. Without EQ, Amir “can’t recommend the Q Acoustics 3020i.”
What the Polk Audio XT15 offers: Very low $179/pair entry price for a Hi-Res Audio Certified 2-way design that’s Dolby Atmos and DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs so it drops into almost any AVR without matching concerns. Directivity spread is reasonably even for the price (directivity_spdi_stddev 3.60). Watch for: Bass rolls off earlier than most of this batch at 77.6Hz (-3dB) / 54.2Hz (-10dB). On-axis deviation is the roughest measured figure here (aad_on_axis 0.449), and listening-window smoothness (0.303) trails the pricier options in this group. Modest 86dB sensitivity wants a reasonably powered amp channel. The 5.25” bi-laminate paper woofer is Polk’s entry-tier driver, not the polypropylene/Turbine cones used in its pricier Signature Elite/Reserve lines.
Buy the Polk Audio XT15. It ranks higher for sound quality than the Q Acoustics 3020i and costs less, so there is no real case for the other one.
If sound quality matters at all to you, skip the Q Acoustics 3020i. It ranks near the bottom of the 71 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Q Acoustics 3020i | Polk Audio XT15 | |
|---|---|---|
| Price | $314.99 | $179.00 |
| Ranked | #54 of 71 in Medium Size Bookshelf Speakers | #28 of 71 in Medium Size Bookshelf Speakers |
| Drivers | 125mm (5") bass driver, 22mm (0.9") tweeter | 1" Terylene dome tweeter, 5.25" bi-laminate paper woofer |
| Dimensions | 10.9"H x 6.7"W x 11.1"D (278 x 170 x 282 mm) | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each |
| Weight | 10.6 lbs / 4.8 kg each | 9 lbs / 4.08 kg (9 lb) each |
| Sensitivity | 86dB (2.83V/1m, manufacturer specified) | 86dB (1W/1m) |
| Crossover Frequency | 2.4kHz | - |
| Impedance | 6 ohms nominal, 4 ohms minimum | 4/8-ohm compatible |
| Woofer Cabinet | ported, reflex | Ported |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 77.6Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 49.8Hz (measured, Audio Science Review) | 54.2Hz (measured, spinorama.org) |
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The Two Speakers In Full
Q Acoustics 3020i: $314.99 Amazon eBay
Pros: UK-designed (Finkteam) with attractive styling, including recessed binding posts and custom connectors. Vertical directivity is good enough that the tweeter doesn’t need to be exactly at ear level. With EQ correction, especially high-frequency shelving and a sub-40Hz high-pass filter, Amir found performance “improves substantially.”
Cons: On-axis response shows a rising upper-frequency trend and a dip in the 2-4kHz crossover region alongside two resonance-related dips; a significant resonance appears at 366Hz in the waterfall plot. Horizontal directivity is narrow and uneven due to a woofer/tweeter beamwidth mismatch. Amir cautions the speaker is “merely a distortion generator” if played too low, and its low impedance demands a quality amplifier. Without EQ, Amir “can’t recommend the Q Acoustics 3020i.”
Full Q Acoustics 3020i review and specifications →
| Bass Extension (-10dB) | 49.8Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) |
| Crossover Frequency | 2.4kHz |
| Dimensions | 10.9"H x 6.7"W x 11.1"D (278 x 170 x 282 mm) |
| Drivers | 125mm (5") bass driver, 22mm (0.9") tweeter |
| Impedance | 6 ohms nominal, 4 ohms minimum |
| Sensitivity | 86dB (2.83V/1m, manufacturer specified) |
| Weight | 10.6 lbs / 4.8 kg each |
| Woofer Cabinet | ported, reflex |
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Polk Audio XT15: $179.00 Amazon Bhphotovideo Crutchfield eBay
Pros: Very low $179/pair entry price for a Hi-Res Audio Certified 2-way design that’s Dolby Atmos and DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs so it drops into almost any AVR without matching concerns. Directivity spread is reasonably even for the price (directivity_spdi_stddev 3.60).
Cons: Bass rolls off earlier than most of this batch at 77.6Hz (-3dB) / 54.2Hz (-10dB). On-axis deviation is the roughest measured figure here (aad_on_axis 0.449), and listening-window smoothness (0.303) trails the pricier options in this group. Modest 86dB sensitivity wants a reasonably powered amp channel. The 5.25” bi-laminate paper woofer is Polk’s entry-tier driver, not the polypropylene/Turbine cones used in its pricier Signature Elite/Reserve lines.
Full Polk Audio XT15 review and specifications →
| Bass Extension (-10dB) | 54.2Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) |
| Dimensions | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each |
| Drivers | 1" Terylene dome tweeter, 5.25" bi-laminate paper woofer |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB (1W/1m) |
| Weight | 9 lbs / 4.08 kg (9 lb) each |
| Woofer Cabinet | Ported |
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