Short answer: both are discontinued, so this only matters if you are buying used, though neither ranks well in its class. Used, the Jamo SUB 800 is the better pick: it ranks #59 of 73 subwoofers by sound quality (rated 2.9/5), against #66 (rated 2.7/5) for the Monoprice Monolith 8 THX Certified. Both are rated below 3.0/5 among the 73 subwoofers, and the Edifier T5s, ranked #2 at $189.99, is a better place to start if sound quality matters.
The case for the Jamo SUB 800: A tiny cube subwoofer with a passive radiator that adds bass to a small 2.1 or satellite system without taking up floor space. The tradeoff: Its small driver and cabinet run out of steam in the deepest bass: measured output falls to 84.1dB at 31.5Hz and 95.1dB at 40Hz.
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 Jamo SUB 800 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the Edifier T5s instead.
Want more options? Browse the full Subwoofers rankings.
A tiny cube subwoofer with a passive radiator that adds bass to a small 2.1 or satellite system without taking up floor space.
A compact THX certified 8 inch subwoofer with selectable modes, sized for a small room or satellite system.
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Specifications Side By Side
| Jamo SUB 800 | Monoprice Monolith 8 THX Certified | |
|---|---|---|
| Price | $499 Discontinued | $350 Discontinued |
| Ranked | #59 of 73 in Small Home Subwoofers (Under 30 lbs) | #66 of 73 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | passive radiator | ported |
| Output SPL at 31.5 Hz | 84.1 dB | 93.2 dB |
| Output SPL at 40 Hz | 95.1 dB | 96.9 dB |
| Output SPL at 50 Hz | 103.2 dB | 99.3 dB |
| Output SPL at 63 Hz | 108.4 dB | 100.7 dB |
| CEA-2010-A Average (40-80Hz) | 102.2 dB (avg of 3/4 bands) | 99.6 dB |
| Dimensions | 8”H x 8”W x 8”D (203.2 x 203.2 x 203.2 mm) | 12.6”H x 13.5”W x 12.6”D (319.8 x 342.9 x 319.8 mm) |
| Weight | 10.1 lbs (4.6 kg) | 19.8 lbs (9.0 kg) |
| Country | Denmark | United States |
| Measurement Source | Brent Butterworth | ErinsAudioCorner |
| Drivers | 6.5” (165mm) driver | 8” (203mm) driver |
| Output SPL at 20 Hz | - | 72.9 dB |
| Output SPL at 25 Hz | - | 86.1 dB |
| Output SPL at 80 Hz | - | 101.6 dB |
| Output SPL at 100 Hz | - | 101.9 dB |
| Cabinet Color | - | black |
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