Short answer: the Dayton Audio MKSX4 for more output without an in-wall install. It delivers 106.2dB CEA-2010-A average from four 4-inch drivers in a low-profile cabinet under 8 inches, against 102.1dB from the BG Radia BGX-S6B’s six 4-inch drivers in an in-wall panel. The Dayton’s output is budget-tier and its ported design depends on the room, while the BGX-S6B needs in-wall installation and is limited to 102.1dB.
On the BG Radia BGX-S6B side: Six 4-inch drivers in a low-profile in-wall panel deliver 102.1dB CEA-2010-A average. The tradeoff: In-wall installation required, limited 102.1 dB output, passive design, and compact 7.3 kg (16.1 lbs) constraints.
The case for the Dayton Audio MKSX4: Four 4-inch drivers in a low-profile (under 8-inch) cabinet deliver 106.2dB CEA-2010-A average. The tradeoff: Budget-tier output at 106.2 dB, four small 4-inch drivers, ported room dependency, and $145 price point.
One note: the BG Radia BGX-S6B is discontinued and no longer widely available new.
Buy the Dayton Audio MKSX4. It is rated higher for sound quality than the BG Radia BGX-S6B and costs less, so the other one has nothing left to offer.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| BG Radia BGX-S6B | Dayton Audio MKSX4 | |
|---|---|---|
| Price | $189 Passive, Discontinued | $144.98 Passive |
| Ranked | #41 of 48 in Small Home Subwoofers (Under 30 lbs) | #14 of 48 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | in-wall | ported, rear |
| Passive | Yes | Yes |
| Output SPL at 20 Hz | 82.3 dB | - |
| Output SPL at 25 Hz | 82.3 dB | - |
| Output SPL at 31.5 Hz | 82.3 dB | 84.7 dB |
| Output SPL at 40 Hz | 102.1 dB | 101.4 dB |
| Output SPL at 50 Hz | 102.1 dB | 112.8 dB |
| Output SPL at 63 Hz | 102.1 dB | 116.3 dB |
| CEA-2010-A Average (40-80Hz) | 102.1 dB (avg of 3/4 bands) | 112.2 dB |
| Dimensions | 14"H x 14"W x 3.7"D (355.6 x 355.6 x 95.2 mm) | 16"H x 5.9"W x 14"D (406.4 x 149.9 x 355.6 mm) |
| Weight | 16.1 lbs (7.3 kg) | 26.9 lbs (12.2 kg) |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Discontinued | Yes | - |
| Drivers | 6x 4" (102mm) driver | 4x 4" (102mm) driver |
| Country | USA | United States |
| Output SPL at 80 Hz | - | 118.3 dB |
| Warranty | - | 5 |
| Cabinet Color | - | black |
Related Speaker Comparisons
How Dayton Audio MKSX4 compares with other leading options:
- Monoprice Premium Select 8in 200-Watt vs Dayton Audio MKSX4
- Monoprice Premium Select 8in 200-Watt vs Wharfedale DX-1
- Monoprice Premium Select 8in 200-Watt vs Revel B8
- Wharfedale DX-1 vs Gallo Acoustics TR-1
- Revel B8 vs Kef T2
Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full
BG Radia BGX-S6B: $189 Passive, Discontinued eBay
Pros: Six 4-inch drivers in a low-profile in-wall panel deliver 102.1dB CEA-2010-A average, a flush-mount alternative for rooms where a cabinet subwoofer won’t fit.
Cons: In-wall installation required, limited 102.1 dB output, passive design, and compact 7.3 kg constraints. Discontinued.
Notes: low profile (<8in)
Full BG Radia BGX-S6B review and specifications →
| CEA-2010-A Average (40-80Hz) | 102.1 dB (avg of 3/4 bands) |
|---|---|
| Country | USA |
| Dimensions | 14"H x 14"W x 3.7"D (355.6 x 355.6 x 95.2 mm) |
| Discontinued | Yes |
| Drivers | 6x 4" (102mm) driver |
| Enclosure | in-wall |
| Measurement Source | Brent Butterworth |
| Output SPL at 20 Hz | 82.3 dB |
| Output SPL at 25 Hz | 82.3 dB |
| Output SPL at 31.5 Hz | 82.3 dB |
| Output SPL at 40 Hz | 102.1 dB |
| Output SPL at 50 Hz | 102.1 dB |
| Output SPL at 63 Hz | 102.1 dB |
| Passive | Yes |
| Weight | 16.1 lbs (7.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
Dayton Audio MKSX4: $144.98 Passive Amazon eBay
Pros: Four 4-inch drivers in a low-profile (under 8-inch) cabinet deliver 106.2dB CEA-2010-A average, the best output-per-dollar of any passive subwoofer tested.
Cons: Budget-tier output at 112.2 dB, four small 4-inch drivers, ported room dependency, and $145 price point.
Notes: low profile (<8in)
Full Dayton Audio MKSX4 review and specifications →
| CEA-2010-A Average (40-80Hz) | 112.2 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 16"H x 5.9"W x 14"D (406.4 x 149.9 x 355.6 mm) |
| Drivers | 4x 4" (102mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Brent Butterworth |
| Output SPL at 31.5 Hz | 84.7 dB |
| Output SPL at 40 Hz | 101.4 dB |
| Output SPL at 50 Hz | 112.8 dB |
| Output SPL at 63 Hz | 116.3 dB |
| Output SPL at 80 Hz | 118.3 dB |
| Passive | Yes |
| Warranty | 5 |
| Weight | 26.9 lbs (12.2 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