Short answer: the Definitive Technology SuperCube 2000 for better sound quality, the Klipsch HD Theater 600 for the lower price. The Definitive Technology SuperCube 2000 ranks #5 of 48 subwoofers at $599. The Klipsch HD Theater 600 ranks #25 at $399, $200 cheaper.
One note: the Definitive Technology SuperCube 2000 is discontinued, but it still ranks #5 of 48 subwoofers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the Definitive Technology SuperCube 2000 if sound quality matters more than the price. Buy the Klipsch HD Theater 600 if the price matters more than sound quality.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Definitive Technology SuperCube 2000 | Klipsch HD Theater 600 | |
|---|---|---|
| Price | $599 Discontinued | $399 |
| Ranked | #5 of 48 in Small Home Subwoofers (Under 30 lbs) | #25 of 48 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | passive radiator | ported, rear |
| Output SPL at 20 Hz | 80.1 dB | - |
| Output SPL at 25 Hz | 94.7 dB | 87.1 dB |
| Output SPL at 31.5 Hz | 103.6 dB | 98.4 dB |
| Output SPL at 40 Hz | 109.4 dB | 104.9 dB |
| Output SPL at 50 Hz | 115.0 dB | 107.6 dB |
| Output SPL at 63 Hz | 116.3 dB | 112.1 dB |
| Output SPL at 80 Hz | 116.3 dB | - |
| CEA-2010-A Average (40-80Hz) | 114.2 dB | 108.2 dB (avg of 3/4 bands) |
| Dimensions | 10.8"H x 10.2"W x 10.9"D (273.1 x 260.3 x 276.4 mm) | 13.9"H x 12.5"W x 12.5"D (353.1 x 317.5 x 317.5 mm) |
| Warranty | 5/3 | - |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Discontinued | Yes | - |
| Weight | 24.9 lbs (11.3 kg) | 17 lbs (7.7 kg) |
| Drivers | 7.5" (190mm) driver | 8" (203mm) driver |
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Prices on this page were last checked September 22, 2026 at 5:11 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 SuperCube 2000: $599 Discontinued eBay
Pros: Independent CEA-2010 testing records 80.1 dB at 20 Hz and 114.2 dB through 40-80 Hz. The passive radiator enclosure with 7.5” (190mm) driver delivers substantial upper-bass output for movie effects and music.
Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 273.1H x 260.3W x 276.4D mm cabinet and 11.3 kg mass still require deliberate placement and calibration. Discontinued.
Full Definitive Technology SuperCube 2000 review and specifications →
| CEA-2010-A Average (40-80Hz) | 114.2 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 10.8"H x 10.2"W x 10.9"D (273.1 x 260.3 x 276.4 mm) |
| Discontinued | Yes |
| Drivers | 7.5" (190mm) driver |
| Enclosure | passive radiator |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 80.1 dB |
| Output SPL at 25 Hz | 94.7 dB |
| Output SPL at 31.5 Hz | 103.6 dB |
| Output SPL at 40 Hz | 109.4 dB |
| Output SPL at 50 Hz | 115.0 dB |
| Output SPL at 63 Hz | 116.3 dB |
| Output SPL at 80 Hz | 116.3 dB |
| Warranty | 5/3 |
| Weight | 24.9 lbs (11.3 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
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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