Short answer: the Q Acoustics 3020i for better sound quality, the Polk T15 for the lower price. The Q Acoustics 3020i ranks #39 of 56 bookshelf speakers at $314.99. The Polk T15 ranks #47 at $149, $165.99 cheaper.
On the Q Acoustics 3020i side: UK-designed (Finkteam) with attractive styling, including recessed binding posts and custom connectors. Set against that: 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.
What the Polk T15 gets right: Extremely affordable 2-way design that actually measured better at +/-20 degrees vertical off-axis than directly on-axis. The catch: Spinorama analysis reveals what Amir called a “horrific drop in upper mids/lower treble region of 3 to 6 kHz,” likely from tweeter-woofer phase cancellation directly on-axis.
Buy the Q Acoustics 3020i if sound quality matters more than the price. Buy the Polk T15 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Polk T15. It ranks near the bottom of the 56 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Q Acoustics 3020i | Polk T15 | |
|---|---|---|
| Price | $314.99 | $149.00 |
| Ranked | #39 of 56 in Medium Size Bookshelf Speakers | #47 of 56 in Medium Size Bookshelf Speakers |
| Drivers | 125mm (5") bass driver, 22mm (0.9") tweeter | 0.75" tweeter, 5.25" woofer |
| Dimensions | 10.9"H x 6.7"W x 11.1"D (278 x 170 x 282 mm) | 10.63H x 6.5W x 7.25D in |
| Weight | 10.6 lbs / 4.8 kg each | 8.2 lbs / 3.74 kg each |
| Sensitivity | 86dB (2.83V/1m, manufacturer specified) | - |
| Crossover Frequency | 2.4kHz | - |
| Impedance | 6 ohms nominal, 4 ohms minimum | 8 ohms nominal |
| Woofer Cabinet | ported, reflex | - |
| Frequency Response | - | 60Hz - 24kHz (Manufacturer specified) |
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The Two Speakers In Full
Q Acoustics 3020i: $314.99 Amazon
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 →
| 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 T15: $149.00 Amazon
Pros: Extremely affordable 2-way design that actually measured better at +/-20 degrees vertical off-axis than directly on-axis. In near-field desktop use, the reviewer found the T15 “didn’t sound that horrible,” partly because nearby desk reflections mask the frequency response dip.
Cons: Spinorama analysis reveals what Amir called a “horrific drop in upper mids/lower treble region of 3 to 6 kHz,” likely from tweeter-woofer phase cancellation directly on-axis. Measured impedance ranges from 4-8 ohms, contradicting the specified 6-8 ohm range, and there’s a distortion peak around 400Hz. On- and off-axis response “vary a ton,” making listening position unusually important. The reviewer recommends saving up for the Pioneer SP-BS22-LR instead: “I can’t justify recommending the Polk T15 even though subjective performance was not horrible.”
Full Polk T15 review and specifications →
| Dimensions | 10.63H x 6.5W x 7.25D in |
|---|---|
| Drivers | 0.75" tweeter, 5.25" woofer |
| Frequency Response | 60Hz - 24kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Weight | 8.2 lbs / 3.74 kg each |
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