Short answer: the Monoprice Premium Select 8in 200-Watt. It ranks #33 of 48 subwoofers by sound quality at $224.99; the REL Acoustics Tzero MKIII ranks #48 and costs $599, which makes this an easy call rather than a real tradeoff.
What the Monoprice Premium Select 8in 200-Watt offers: 8-inch ported driver still manages 106.4dB CEA-2010-A average at the lowest price of any subwoofer tested in this weight class. An easy entry point for a first subwoofer. Watch for: Very compact 8.4 kg size, limited 106.4 dB output, ported room interaction, and entry-level build.
What the REL Acoustics Tzero MKIII offers: Independent CEA-2010 testing records 89.2 dB through 40-80 Hz. The sealed enclosure with 6.5” (165mm) driver is intended to add useful bass support without a full-size cabinet. Watch for: Without a published 20 Hz output result, deep-bass capability is less certain than its midbass figure. The 241.3H x 215.9W x 266.7D mm cabinet and 6.8 kg mass still need careful placement and calibration.
Buy the Monoprice Premium Select 8in 200-Watt. It ranks higher for sound quality than the REL Acoustics Tzero MKIII and costs less, so the other one has nothing left to offer.
If sound quality matters at all to you, skip the REL Acoustics Tzero MKIII. It ranks near the bottom of the 48 subwoofers, so look higher up the list instead.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Monoprice Premium Select 8in 200-Watt | REL Acoustics Tzero MKIII | |
|---|---|---|
| Price | $224.99 | $599.00 |
| Ranked | #33 of 48 in Small Home Subwoofers (Under 30 lbs) | #48 of 48 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 20 Hz | 51.3 dB | - |
| Output SPL at 25 Hz | 69.3 dB | 70.4 dB |
| Output SPL at 31.5 Hz | 91.8 dB | 76.6 dB |
| Output SPL at 40 Hz | 98.3 dB | 83.7 dB |
| Output SPL at 50 Hz | 104.8 dB | 89.7 dB |
| Output SPL at 63 Hz | 110.7 dB | 91.5 dB |
| Output SPL at 80 Hz | 111.8 dB | 92.1 dB |
| CEA-2010-A Average (40-80Hz) | 106.4 dB | 89.2 dB |
| Dimensions | 15"H x 10.6"W x 12.8"D (381.0 x 269.2 x 325.1 mm) | 9.5"H x 8.5"W x 10.5"D (241.3 x 215.9 x 266.7 mm) |
| Weight | 18.5 lbs (8.4 kg) | 15 lbs (6.8 kg) |
| Cabinet Color | black | black, white |
| Country | United States | United Kingdom |
| Measurement Source | Brent Butterworth | ErinsAudioCorner |
| Drivers | 8" (203mm) driver | 6.5" (165mm) driver |
| Output SPL at 100 Hz | - | 90.8 dB |
| Warranty | - | 3 |
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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
Monoprice Premium Select 8in 200-Watt: $224.99 Amazon eBay
Pros: 8-inch ported driver still manages 106.4dB CEA-2010-A average at the lowest price of any subwoofer tested in this weight class. An easy entry point for a first subwoofer.
Cons: Very compact 8.4 kg size, limited 106.4 dB output, ported room interaction, and entry-level build.
Notes: Product # 14567
Full Monoprice Premium Select 8in 200-Watt review and specifications →
| CEA-2010-A Average (40-80Hz) | 106.4 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 15"H x 10.6"W x 12.8"D (381.0 x 269.2 x 325.1 mm) |
| Drivers | 8" (203mm) driver |
| Enclosure | ported, front |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 51.3 dB |
| Output SPL at 25 Hz | 69.3 dB |
| Output SPL at 31.5 Hz | 91.8 dB |
| Output SPL at 40 Hz | 98.3 dB |
| Output SPL at 50 Hz | 104.8 dB |
| Output SPL at 63 Hz | 110.7 dB |
| Output SPL at 80 Hz | 111.8 dB |
| Weight | 18.5 lbs (8.4 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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- See all 34 comparisons
REL Acoustics Tzero MKIII: $599.00 Amazon eBay
Pros: Independent CEA-2010 testing records 89.2 dB through 40-80 Hz. The sealed enclosure with 6.5” (165mm) driver is intended to add useful bass support without a full-size cabinet.
Cons: Without a published 20 Hz output result, deep-bass capability is less certain than its midbass figure. The 241.3H x 215.9W x 266.7D mm cabinet and 6.8 kg mass still need careful placement and calibration.
Full REL Acoustics Tzero MKIII review and specifications →
| CEA-2010-A Average (40-80Hz) | 89.2 dB |
|---|---|
| Cabinet Color | black, white |
| Country | United Kingdom |
| Dimensions | 9.5"H x 8.5"W x 10.5"D (241.3 x 215.9 x 266.7 mm) |
| Drivers | 6.5" (165mm) driver |
| Enclosure | sealed |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 25 Hz | 70.4 dB |
| Output SPL at 31.5 Hz | 76.6 dB |
| Output SPL at 40 Hz | 83.7 dB |
| Output SPL at 50 Hz | 89.7 dB |
| Output SPL at 63 Hz | 91.5 dB |
| Output SPL at 80 Hz | 92.1 dB |
| Output SPL at 100 Hz | 90.8 dB |
| Warranty | 3 |
| Weight | 15 lbs (6.8 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