Short answer: the Polk Audio XT15. It ranks #29 of 87 bookshelf speakers by sound quality at $179; the Boston Acoustics A25 ranks #35 and costs $299.98, so there is not much of a tradeoff to weigh.
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.
What the Boston Acoustics A25 offers: CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz - directivity is good enough that the response can be EQed and won’t be too room-dependent. Cabinet fit and finish is well above its price class, and dynamics were strong with no distortion audible even at high volume on well-recorded material. Discontinued, but the reviewer suggests hunting for clearance pricing on remaining stock. Watch for: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip. The rear port itself measured audibly distorted up close, though it wasn’t noticeable from normal listening distance in the reviewer’s room.
Buy the Polk Audio XT15. It ranks higher for sound quality than the Boston Acoustics A25 and costs less, so there is no real case for the other one.
Specifications Side By Side
| Polk Audio XT15 | Boston Acoustics A25 | |
|---|---|---|
| Price | $179.00 | $299.98 Discontinued |
| Ranked | #29 of 87 in Medium Size Bookshelf Speakers | #35 of 87 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 54.2Hz (measured, spinorama.org) | 55Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) | 90Hz (measured, Audio Science Review) |
| Dimensions | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each | 10.7H x 7.25W x 8.9D in |
| Impedance | 4/8-ohm compatible | 8 ohms nominal |
| Sensitivity | 86dB (1W/1m) | 85dB (2.83V/1m, measured, Audio Science Review) |
| Drivers | 1" Terylene dome tweeter, 5.25" bi-laminate paper woofer | 1" Kortec soft dome tweeter, 5.25" ceramic/glass-fiber polymer mid/woofer |
| Weight | 9 lbs / 4.08 kg (9 lb) each | 10.1 lbs / 4.58 kg each |
| Woofer Cabinet | Ported | ported, rear |
| Discontinued | - | Yes |
| Frequency Response | - | 55Hz - 25kHz (Manufacturer specified) |
| Power Handling | - | 10-150W recommended |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Wharfedale Diamond 220 vs Polk T15
- Wharfedale Diamond 220 vs Micca RB42
- Wharfedale Diamond 220 vs JBL Control 1 Pro
- JBL Stage A120 vs Polk Audio XT15
- Boston Acoustics A25 vs Pioneer SP-BS22-LR (Philharmonic AAM Mod)
Prices on this page were last checked August 25, 2026 at 6:19 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
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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Boston Acoustics A25: $299.98 Discontinued eBay
Pros: CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz - directivity is good enough that the response can be EQed and won’t be too room-dependent. Cabinet fit and finish is well above its price class, and dynamics were strong with no distortion audible even at high volume on well-recorded material. Discontinued, but the reviewer suggests hunting for clearance pricing on remaining stock.
Cons: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip. The rear port itself measured audibly distorted up close, though it wasn’t noticeable from normal listening distance in the reviewer’s room. Discontinued.
Full Boston Acoustics A25 review and specifications →
| Bass Extension (-10dB) | 55Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 90Hz (measured, Audio Science Review) |
| Dimensions | 10.7H x 7.25W x 8.9D in |
| Discontinued | Yes |
| Drivers | 1" Kortec soft dome tweeter, 5.25" ceramic/glass-fiber polymer mid/woofer |
| Frequency Response | 55Hz - 25kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Power Handling | 10-150W recommended |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 10.1 lbs / 4.58 kg each |
| Woofer Cabinet | ported, rear |
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- Head-to-Head Comparisons
- Boston Acoustics A25 vs Wharfedale Diamond 220
- Boston Acoustics A25 vs JBL Studio 530
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