Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality, rated 4.1/5, at $374.99; the Klipsch HD Theater 600 ranks #25, rated 3.3/5, and costs $399, which makes this an easy call rather than a real tradeoff.
The case for the Monoprice SW-15: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. The tradeoff: Budget-tier design, ported room gain dependency, 30 kg (66.1 lbs) mid-size, and limited dynamic headroom.
Buy the Monoprice SW-15. It is rated higher for sound quality than the Klipsch HD Theater 600 and costs less, so the other one has nothing left to offer.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Klipsch HD Theater 600 | Monoprice SW-15 | |
|---|---|---|
| Price | $399 | $374.99 |
| Ranked | #25 of 48 in Small Home Subwoofers (Under 30 lbs) | #13 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, rear | ported, bottom |
| Output SPL at 25 Hz | 87.1 dB | 106.3 dB |
| Output SPL at 31.5 Hz | 98.4 dB | 111.2 dB |
| Output SPL at 40 Hz | 104.9 dB | 116.0 dB |
| Output SPL at 50 Hz | 107.6 dB | 120.2 dB |
| Output SPL at 63 Hz | 112.1 dB | 120.5 dB |
| CEA-2010-A Average (40-80Hz) | 108.2 dB (avg of 3/4 bands) | 119.0 dB |
| Dimensions | 13.9"H x 12.5"W x 12.5"D (353.1 x 317.5 x 317.5 mm) | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Audioholics |
| Weight | 17 lbs (7.7 kg) | 66.1 lbs (30.0 kg) |
| Drivers | 8" (203mm) driver | 15" (381mm) driver |
| Output SPL at 15 Hz | - | 90.0 dB |
| Output SPL at 20 Hz | - | 101.2 dB |
| Output SPL at 80 Hz | - | 119.5 dB |
| Warranty | - | 1 |
| Cabinet Color | - | black |
| Frequency Response | - | 30-150Hz (-10dB) |
| Amplifier Power | - | 600W RMS / 800W peak |
| Crossover Frequency | - | 40-150Hz, 18dB/octave |
| Phase Control | - | 0° or 180° |
| Inputs | - | Stereo line level and speaker level |
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Prices on this page were last checked September 23, 2026 at 11:24 PM 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
Klipsch HD Theater 600: $399 eBay
Pros: Independent CEA-2010 testing records 108.2 dB (avg of 3/4 bands) through 40-80 Hz. The ported, rear enclosure with 8” (203mm) driver is a compact way to add useful midbass support to a modest system.
Cons: Without a published 20 Hz result, deep-bass capability is less certain than the midbass figure. The 353.1H x 317.5W x 317.5D mm cabinet and 7.7 kg mass still need careful placement and calibration.
Full Klipsch HD Theater 600 review and specifications →
| CEA-2010-A Average (40-80Hz) | 108.2 dB (avg of 3/4 bands) |
|---|---|
| Country | United States |
| Dimensions | 13.9"H x 12.5"W x 12.5"D (353.1 x 317.5 x 317.5 mm) |
| Drivers | 8" (203mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Brent Butterworth |
| Output SPL at 25 Hz | 87.1 dB |
| Output SPL at 31.5 Hz | 98.4 dB |
| Output SPL at 40 Hz | 104.9 dB |
| Output SPL at 50 Hz | 107.6 dB |
| Output SPL at 63 Hz | 112.1 dB |
| Weight | 17 lbs (7.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
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Monoprice SW-15: $374.99 Amazon eBay
Pros: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup.
Cons: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.
Notes: Product # 41499
Full Monoprice SW-15 review and specifications →
| Amplifier Power | 600W RMS / 800W peak |
|---|---|
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
| Cabinet Color | black |
| Country | United States |
| Crossover Frequency | 40-150Hz, 18dB/octave |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 30-150Hz (-10dB) |
| Inputs | Stereo line level and speaker level |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 90.0 dB |
| Output SPL at 20 Hz | 101.2 dB |
| Output SPL at 25 Hz | 106.3 dB |
| Output SPL at 31.5 Hz | 111.2 dB |
| Output SPL at 40 Hz | 116.0 dB |
| Output SPL at 50 Hz | 120.2 dB |
| Output SPL at 63 Hz | 120.5 dB |
| Output SPL at 80 Hz | 119.5 dB |
| Phase Control | 0° or 180° |
| Warranty | 1 |
| Weight | 66.1 lbs (30.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15SEICE-BASE
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- Monoprice SW-15 vs Paradigm Defiance X12
- Monoprice SW-15 vs Power Sound Audio (PSA) XS15-BASE
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15
- Monoprice SW-15 vs Klipsch SPL-120
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