Subwoofer choice is the part of a system where specifications mislead people most often. This page compares Polk's powered subwoofers on published data and explains the placement and calibration work that determines the result.
A powered subwoofer reproduces the low-frequency effects channel plus everything the main speakers hand over at the crossover. Driver size and enclosure set the ceiling of what a subwoofer can do, but placement decides most of what you actually hear — which is why we choose the position by measurement at the seats rather than by convenience.
The subwoofer carries the low-frequency effects channel in a film mix and takes over from the main speakers below the crossover. In a small closed room, bass builds up unevenly because of room modes, so two seats a metre apart can measure very differently. That unevenness — not raw output — is usually what makes bass sound slow or boomy.
Values below are Polk's own published figures. Where a specification is not published, the cell reads "Specification currently being verified" rather than carrying an estimate. Each model has its own page with the full specification set, system role and installation notes.
| Model | Series | Drivers | Frequency response | Sensitivity | Detail page |
|---|---|---|---|---|---|
| ES8 Subwoofer | Signature Elite | 1 × 8" mineral-filled polypropylene cone woofer with Power Port | 32 Hz – 180 Hz (−3 dB); 28 Hz – 400 Hz (−10 dB) | Specification currently being verified | View |
| ES10 Subwoofer | Signature Elite | 1 × 10" mineral-filled polypropylene cone woofer with dual Power Ports | 28 Hz – 250 Hz (−3 dB); 22 Hz – 375 Hz (−10 dB) | Specification currently being verified | View |
| ES12 Subwoofer | Signature Elite | 1 × 12" mineral-filled polypropylene cone woofer with dual Power Ports | 22 Hz – 250 Hz (−3 dB); 18 Hz – 350 Hz (−10 dB) | Specification currently being verified | View |
| XT12 Subwoofer | Monitor XT | 1 × 12" bi-laminate paper woofer, Class A/B amplifier, ported enclosure | Polk publishes low-frequency extension to 24 Hz; adjustable crossover 80 – 160 Hz | Specification currently being verified | View |
| XT10 Subwoofer | Monitor XT | 1 × 10" woofer, Class D amplifier, ported enclosure | Polk publishes low-frequency extension to 24 Hz; adjustable crossover 40 – 160 Hz | Specification currently being verified | View |
| PSW10 | PSW | 1 × 10" Dynamic Balance polymer composite cone woofer, front-firing flared port, Class D amplifier | 40 Hz – 160 Hz (−3 dB) | Specification currently being verified | View |
Selection is a room decision. These are the factors we work through before suggesting a model, in this order:
We test two or three candidate positions against the actual seats, measure at each, then fix the position. Corner placement raises output but often worsens seat-to-seat consistency. After the position is fixed we set the crossover from the main speakers' real capability, set phase against the main channels, set level, then re-run room correction and confirm with both music and film content.
Most of the rooms we are asked to correct have the right equipment installed the wrong way. These are the recurring ones:
Each page lists manufacturer-published specifications, the model's role in a system, room and placement considerations, receiver matching and installation guidance.
Specifications on this page are taken from Polk Audio's own published product information and are re-checked before each content update. Where a value is not published by the manufacturer, we leave it out rather than estimate it — you will see "Specification currently being verified" instead of a guessed number. Everything else on this page is LiveInSmart's own system-design and installation guidance, written by the engineers who commission these rooms.
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Wherever it measures best at the seats. We test candidate positions before fixing it, because the room, not the subwoofer, decides how even the bass is.
In a room with more than one row of seats, or a room with strong modal problems, two subwoofers in different positions give far more consistent bass than one larger unit.
Set it from what the main speakers can actually do in the room. It is a calibration decision, not a fixed number copied from a manual.
Low frequencies travel through structure. Isolation feet or a decoupling platform, sensible level setting and a measured placement all reduce transmission — as does treating the problem at the design stage rather than after complaints.
No. A larger driver in the wrong position in a small room produces worse bass than a smaller one in a measured position. Placement and calibration come first.
As an authorised Polk Audio dealer in Telangana and Andhra Pradesh, we can help with product selection, system design, installation and calibration. Send us your room dimensions, seating position, ceiling type and how you use the room for a room-appropriate configuration.
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