Short answer: the Dayton Audio SUB-1000L. It ranks #26 of 73 subwoofers by sound quality (rated 3.4/5) at $209.98 and is still sold new; the Monoprice Monolith 8 THX Certified ranks #66 (rated 2.7/5) and is discontinued, so it is only an option used.
The Dayton Audio SUB-1000L is the better-sounding choice. A budget low profile 10 inch subwoofer only 15 cm tall, made to slide under a couch or bed. The tradeoff: Deep-bass output is limited relative to its midbass result, so it is not the right choice for the lowest movie effects.
What the Monoprice Monolith 8 THX Certified does well: A compact THX certified 8 inch subwoofer with selectable modes, sized for a small room or satellite system. Watch for: Deep-bass output is modest for a home-theater subwoofer, falling to 72.9dB at 20Hz and 86.1dB at 25Hz.
Buy the Dayton Audio SUB-1000L. It is rated higher for sound quality; the Monoprice Monolith 8 THX Certified is no longer sold new.
Still deciding? The full Subwoofers rankings cover every ranked option.
A budget low profile 10 inch subwoofer only 15 cm tall, made to slide under a couch or bed.
A compact THX certified 8 inch subwoofer with selectable modes, sized for a small room or satellite system.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Dayton Audio SUB-1000L | Monoprice Monolith 8 THX Certified | |
|---|---|---|
| Price | $209.98 | $350 Discontinued |
| Ranked | #26 of 73 in Small Home Subwoofers (Under 30 lbs) | #66 of 73 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | ported, bottom | ported |
| Output SPL at 20 Hz | 89.9 dB | 72.9 dB |
| Output SPL at 25 Hz | 96.8 dB | 86.1 dB |
| Output SPL at 31.5 Hz | 100.9 dB | 93.2 dB |
| Output SPL at 40 Hz | 104.9 dB | 96.9 dB |
| Output SPL at 50 Hz | 108.3 dB | 99.3 dB |
| Output SPL at 63 Hz | 111.9 dB | 100.7 dB |
| Output SPL at 80 Hz | 114.7 dB | 101.6 dB |
| CEA-2010-A Average (40-80Hz) | 110.0 dB | 99.6 dB |
| Dimensions | 6”H x 25”W x 15.7”D (152.4 x 635.0 x 400.0 mm) | 12.6”H x 13.5”W x 12.6”D (319.8 x 342.9 x 319.8 mm) |
| Weight | 28.4 lbs (12.9 kg) | 19.8 lbs (9.0 kg) |
| Warranty | 5 | - |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | ErinsAudioCorner |
| Drivers | 10” (254mm) driver | 8” (203mm) driver |
| Output SPL at 100 Hz | - | 101.9 dB |
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