Short answer: the Polk Audio XT15. It ranks #51 of 168 bookshelf speakers by sound quality, rated 3.7/5, at $149; the Definitive Technology ProMonitor 1000 ranks #156, rated 1.7/5, and costs $398.40, which makes this an easy call rather than a real tradeoff.
What the Definitive Technology ProMonitor 1000 does well: Bass distortion is well controlled per the measurements, and the slow bass rolloff means it can be pushed fairly hard for its size. The tradeoff: CEA2034 spinorama shows severely reduced bass energy between 40-120Hz, a directivity mismatch between the tweeter and woofer, and a severe resonance/interference issue around 14kHz.
The Polk Audio XT15 is the more accurate, deeper-bass choice. Very low $149/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. Its measured preference score, a predictor of how neutral it sounds, is 4.56 against 3.20 for the Definitive Technology ProMonitor 1000. Its bass reaches about 77.6Hz before falling 3dB, against 95Hz for the Definitive Technology ProMonitor 1000. Watch for: Bass rolls off early, at 77.6Hz (-3dB) and 54.2Hz (-10dB).
Buy the Polk Audio XT15. It is rated higher for sound quality than the Definitive Technology ProMonitor 1000 and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Definitive Technology ProMonitor 1000 | Polk Audio XT15 | |
|---|---|---|
| Price | $398.40 per pair | $149.00 per pair |
| Ranked | #156 of 168 in Medium Size Bookshelf Speakers | #51 of 168 in Medium Size Bookshelf Speakers |
| Bass Extension (-3dB) | 95Hz (measured, Audio Science Review) | 77.6Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 80Hz (measured, Audio Science Review) | 54.2Hz (measured, spinorama.org) |
| Drivers | 1” aluminum dome tweeter, 5.25” BDSS mid/woofer, 5.25” planar bass radiator | 1” Terylene dome tweeter, 5.25” bi-laminate paper woofer |
| Dimensions | 10.88H x 6.25W x 6.5D in | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each |
| Weight | 7.3 lbs (3.29 kg) each | 9 lbs (4.08 kg) each |
| Frequency Response | 47Hz - 30kHz (Manufacturer specified) | - |
| Sensitivity | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) | 86dB (1W/1m) |
| Impedance | 8 ohms nominal | 4/8-ohm compatible |
| Woofer Cabinet | passive radiator | Ported |
| Spinorama Preference Score | 3.2 (spinorama.org) | 4.56 |
| Spinorama Preference Score with Perfect Sub | 6.58 (spinorama.org) | 7.31 |
| DIY Kit | No | No |
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Prices on this page were last checked October 9, 2026 at 8:01 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.
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The Two Speakers In Full
Definitive Technology ProMonitor 1000: $398.40 per pair Amazon eBay
Pros: Bass distortion is well controlled per the measurements, and the slow bass rolloff means it can be pushed fairly hard for its size. Ships with a footer that keeps the small cabinet planted despite its light weight. Measured bass extension of 95Hz (-3dB), with a measured sensitivity of 86dB.
Cons: CEA2034 spinorama shows severely reduced bass energy between 40-120Hz, a directivity mismatch between the tweeter and woofer, and a severe resonance/interference issue around 14kHz. Distortion at 96dB SPL was so bad the reviewer limited testing to 86dB. Direct comparison to a $118/pair Pioneer SP-BS22-LR left the reviewer calling the $199/pair ProMonitor 1000 “a bad experiment that should be forgotten” and concluding “there is nothing Pro about it.”
Full Definitive Technology ProMonitor 1000 review and specifications →
| Bass Extension (-10dB) | 80Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 95Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 10.88H x 6.25W x 6.5D in |
| Drivers | 1” aluminum dome tweeter, 5.25” BDSS mid/woofer, 5.25” planar bass radiator |
| Frequency Response | 47Hz - 30kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Sensitivity | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) |
| Spinorama Preference Score | 3.2 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.58 (spinorama.org) |
| Weight | 7.3 lbs (3.29 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Polk Audio XT15: $149.00 per pair Amazon B&H Photo Video Crutchfield eBay
Same family: the Polk Monitor XT20 (larger bookshelf, rated 3.4/5), the Polk Audio XT60 (smaller floorstanding, rated 3.5/5), the Polk Audio XT70 (larger floorstanding, rated 3.6/5), the Polk Audio XT30 (smaller center, rated 3.6/5), the Polk Audio XT35 (larger center, rated 4.1/5), the Polk Audio Monitor XT10 (smaller subwoofer, estimated 3.1/5) and the Polk Audio Monitor XT12 (larger subwoofer, estimated 3.3/5). See every Polk Monitor generation.
Pros: Very low $149/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. Off axis sound tracks the on axis response reasonably consistently for the price. Measured bass extension of 77.6Hz (-3dB).
Cons: Bass rolls off early, at 77.6Hz (-3dB) and 54.2Hz (-10dB). On-axis response is relatively uneven, with an average deviation of about 0.45dB, and its listening window is less smooth than pricier speakers. 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) |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 4.56 |
| Spinorama Preference Score with Perfect Sub | 7.31 |
| Weight | 9 lbs (4.08 kg) each |
| Woofer Cabinet | Ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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