Short answer: the Jamo SUB 800 on measured sound quality, the Monoprice Monolith 8 THX Certified on price. The Jamo SUB 800 ranks #38 of 48 subwoofers at $499. The Monoprice Monolith 8 THX Certified ranks #43 at $350, $149 cheaper.
What the Jamo SUB 800 offers: A tiny 4.6kg, 20cm-cube subwoofer that can add useful bass in a compact 2.1 or satellite system without dominating the room. Its passive-radiator design produces respectable measured output for its size: 103.2dB at 50Hz and 108.4dB at 63Hz. Reviewers found it capable of surprisingly low extension when carefully adjusted. Watch for: 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. Reviews also find its balance difficult to dial in, where restraining the low-end thud can leave a mid-bass hole. It suits a small room and modest satellites, not high-impact cinema bass.
What the Monoprice Monolith 8 THX Certified offers: A compact 9kg, ported 8-inch subwoofer with THX certification that can suit a small room or satellite-based system without taking much floor space. Measured output is useful through the upper bass: 99.3dB at 50Hz, 100.7dB at 63Hz and 101.6dB at 80Hz. Its selectable THX/EQ modes provide a more controlled option for music than the extended setting. Watch for: Deep-bass output is modest for a home-theater subwoofer, falling to 72.9dB at 20Hz and 86.1dB at 25Hz. It will not deliver the infrasonic impact or room-filling output of a larger model, and the manufacturer lists it as out of stock. Choose it for compactness and moderate listening levels, not for demanding cinema effects.
Buy the Jamo SUB 800 if sound quality is the priority over the price, or the Monoprice Monolith 8 THX Certified if the price is the priority over sound quality.
If sound quality matters at all to you, skip both of these and look higher up the 48 subwoofers instead.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Jamo SUB 800 | Monoprice Monolith 8 THX Certified | |
|---|---|---|
| Price | $499 | $350 |
| Ranked | #38 of 48 in Small Home Subwoofers (Under 30 lbs) | #43 of 48 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 |
Related Speaker Comparisons
How Jamo SUB 800 compares with other leading options:
- Dayton Audio SUB-1000L vs Jamo SUB 800
- ELAC SUB1010 vs Jamo SUB 800
- Monoprice Premium Select 8in 200-Watt vs Jamo SUB 800
- Jamo SUB 800 vs JL Audio Dominion d108
- Paradigm Millenia CT vs Monoprice Monolith 8 THX Certified
Prices on this page were last checked September 16, 2026 at 12:41 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
Jamo SUB 800: $499 eBay
Pros: A tiny 4.6kg, 20cm-cube subwoofer that can add useful bass in a compact 2.1 or satellite system without dominating the room. Its passive-radiator design produces respectable measured output for its size: 103.2dB at 50Hz and 108.4dB at 63Hz. Reviewers found it capable of surprisingly low extension when carefully adjusted.
Cons: 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. Reviews also find its balance difficult to dial in, where restraining the low-end thud can leave a mid-bass hole. It suits a small room and modest satellites, not high-impact cinema bass.
Full Jamo SUB 800 review and specifications →
| CEA-2010-A Average (40-80Hz) | 102.2 dB (avg of 3/4 bands) |
|---|---|
| Country | Denmark |
| Dimensions | 8"H x 8"W x 8"D (203.2 x 203.2 x 203.2 mm) |
| Drivers | 6.5" (165mm) driver |
| Enclosure | passive radiator |
| Measurement Source | Brent Butterworth |
| Output SPL at 31.5 Hz | 84.1 dB |
| Output SPL at 40 Hz | 95.1 dB |
| Output SPL at 50 Hz | 103.2 dB |
| Output SPL at 63 Hz | 108.4 dB |
| Weight | 10.1 lbs (4.6 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
Monoprice Monolith 8 THX Certified: $350 eBay
Pros: A compact 9kg, ported 8-inch subwoofer with THX certification that can suit a small room or satellite-based system without taking much floor space. Measured output is useful through the upper bass: 99.3dB at 50Hz, 100.7dB at 63Hz and 101.6dB at 80Hz. Its selectable THX/EQ modes provide a more controlled option for music than the extended setting.
Cons: Deep-bass output is modest for a home-theater subwoofer, falling to 72.9dB at 20Hz and 86.1dB at 25Hz. It will not deliver the infrasonic impact or room-filling output of a larger model, and the manufacturer lists it as out of stock. Choose it for compactness and moderate listening levels, not for demanding cinema effects.
Notes: Product # 41289
Full Monoprice Monolith 8 THX Certified review and specifications →
| CEA-2010-A Average (40-80Hz) | 99.6 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 12.6"H x 13.5"W x 12.6"D (319.8 x 342.9 x 319.8 mm) |
| Drivers | 8" (203mm) driver |
| Enclosure | ported |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 20 Hz | 72.9 dB |
| Output SPL at 25 Hz | 86.1 dB |
| Output SPL at 31.5 Hz | 93.2 dB |
| Output SPL at 40 Hz | 96.9 dB |
| Output SPL at 50 Hz | 99.3 dB |
| Output SPL at 63 Hz | 100.7 dB |
| Output SPL at 80 Hz | 101.6 dB |
| Output SPL at 100 Hz | 101.9 dB |
| Weight | 19.8 lbs (9.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Monoprice Monolith 8 THX Certified vs Paradigm Millenia CT
- Monoprice Monolith 8 THX Certified vs Monoprice Premium Select 8in 200-Watt
- Monoprice Monolith 8 THX Certified vs Andover Audio SpinSub
- Monoprice Monolith 8 THX Certified vs ELAC SUB1010
- Monoprice Monolith 8 THX Certified vs Dayton Audio SUB-1000L