Short answer: the Monoprice SW-15 for better sound quality, the Bestisan SW65D for the lower price. The Monoprice SW-15 ranks #14 of 212 subwoofers, rated 4.1/5, at $499.99. The Bestisan SW65D ranks #202, rated 3.0/5, at $89.99, $410 cheaper.
The Monoprice SW-15 is the better-sounding option. A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room. The tradeoff: Budget-tier design, ported room gain dependency, 66.1 lbs (30 kg) mid-size, and limited dynamic headroom.
Why pick the Bestisan SW65D: A very cheap 6.5 inch subwoofer with line, LFE and speaker-level inputs, an easy bass add for a TV, soundbar or small room. Watch for: Measured output is modest, averaging 105.0dB from 40 to 80Hz and dropping to 94.3dB at 40Hz, so it will not fill a large room or deliver deep movie effects.
Buy the Monoprice SW-15 if sound quality matters more than the price. Buy the Bestisan SW65D if the price matters more than sound quality.
Want more options? Browse the full Subwoofers rankings.
A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room.
A very cheap 6.5 inch subwoofer with line, LFE and speaker-level inputs, an easy bass add for a TV, soundbar or small room.
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
| Monoprice SW-15 | Bestisan SW65D | |
|---|---|---|
| Price | $499.99 | $89.99 |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #202 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported, front |
| Output SPL at 15 Hz | 90.0 dB | - |
| Output SPL at 20 Hz | 101.2 dB | - |
| Output SPL at 25 Hz | 106.3 dB | - |
| Output SPL at 31.5 Hz | 111.2 dB | - |
| Output SPL at 40 Hz | 116.0 dB | 94.3 dB |
| Output SPL at 50 Hz | 120.2 dB | 103.5 dB |
| Output SPL at 63 Hz | 120.5 dB | 110.0 dB |
| Output SPL at 80 Hz | 119.5 dB | 112.4 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 105.0 dB |
| Dimensions | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) | 12.6”H x 3”W x 12.6”D (320.0 x 76.2 x 320.0 mm) |
| Weight | 66.1 lbs (30.0 kg) | 37.9 lbs (17.2 kg) |
| Warranty | 1 | - |
| Cabinet Color | black | black |
| Country | United States | China |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 30-150Hz (-10dB) | 40-250Hz |
| Amplifier Power | 600W RMS / 800W peak | 50W RMS |
| Crossover Frequency | 40-150Hz, 18dB/octave | - |
| Phase Control | 0° or 180° | - |
| Inputs | Stereo line level and speaker level | - |
| Drivers | 15” (381mm) driver | 6.5” (165mm) driver |
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