Short answer: the W-King D9 ranks #66 of 78 large speakers by sound quality at $71.24; the onn Portable FM Boombox ranks #23 at $74.83. With prices this close, go by the sound-quality ranking rather than the cost.
What the W-King D9 offers: A compact 2kg boombox with 60W RMS output, a claimed 106dB maximum level, a measured 47Hz -10dB bass point, IPX6 protection, power-bank output, USB-C charging, aux and microSD playback. Long-term owners praise its loud, punchy character and useful indoor/outdoor voicing for casual outdoor listening. Watch for: Treble rolls off early, limiting air and fine detail, while owner reports note Bluetooth interference and some noise at maximum speaker volume. There is no app or adjustable EQ, and its bass does not reach as deep as larger rivals, so it is better suited to energetic background music than neutral listening.
What the onn Portable FM Boombox offers: Extremely good value. Reasonably deep bass, though not as deep as something like the JBL Xtreme 3, Soundcore Boom 2, or Tribit Stormbox Lava. IPX7 waterproof and floats. FM radio with 10 presets. 6 multicolor LED lighting effects. Can run on battery or corded power. Watch for: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size. No custom EQ. Only available in the United States and Canada.
Buy the W-King D9 if the price matters more than sound quality. Buy the onn Portable FM Boombox if sound quality matters more than the price.
If sound quality matters at all to you, skip the W-King D9. It ranks near the bottom of the 78 large speakers, so look higher up the list instead.
If battery life is a priority, the W-King D9 is rated for 40 hours versus 16 hours for the onn Portable FM Boombox.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| W-King D9 | onn Portable FM Boombox | |
|---|---|---|
| Price | $71.24 | $74.83 |
| Ranked | #66 of 78 in Large Size Portable Bluetooth Speakers | #23 of 78 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 47Hz | - |
| Battery Life | 40 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| IP Rating | IPX6 | IPX7 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | - |
| Power Bank | Yes (USB-A) | Yes (USB-A) |
| TWS | No | Yes |
| Weight | 4.4 lbs (2.0 kg) | 4.9 lbs (2.22 kg) |
| App | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | Yes (Party Sync, pairs with 1 other onn. speaker) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | - |
| Dimensions | 4.7" x 12.4" x 4.7" (120 x 315 x 120 mm) | 13.8" x 5.9" x 7.7" (350 x 149 x 195 mm) |
| Frequency Response | 80Hz - 16kHz (Manufacturer specified) | - |
| Amplifier Power | 60W RMS | 25W RMS (100W peak) |
| Drivers | 2x 40mm drivers + passive radiators | 2 speakers |
| Digital Aux Input | No | No |
| FM Tuner | - | Yes (10 presets) |
| Removable Battery | - | No |
| Discontinued | - | No |
| Lights | - | Yes |
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How onn Portable FM Boombox compares with other leading options:
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- JBL Xtreme 5 vs onn Portable FM Boombox
- Tribit Stormbox Lava vs onn Portable FM Boombox
- onn Portable FM Boombox vs Brane X
- Minirig 4 with subwoofer vs onn Portable FM Boombox
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
W-King D9: $71.24 Amazon eBay
Pros: A compact 2kg boombox with 60W RMS output, a claimed 106dB maximum level, a measured 47Hz -10dB bass point, IPX6 protection, power-bank output, USB-C charging, aux and microSD playback. Long-term owners praise its loud, punchy character and useful indoor/outdoor voicing for casual outdoor listening. Measured bass extension of 47Hz (-10dB).
Cons: Treble rolls off early, limiting air and fine detail, while owner reports note Bluetooth interference and some noise at maximum speaker volume. There is no app or adjustable EQ, and its bass does not reach as deep as larger rivals, so it is better suited to energetic background music than neutral listening.
Full W-King D9 review and specifications →
| Amplifier Power | 60W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 47Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.7" x 12.4" x 4.7" (120 x 315 x 120 mm) |
| Drivers | 2x 40mm drivers + passive radiators |
| EQ | No |
| Frequency Response | 80Hz - 16kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 4.4 lbs (2.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
onn Portable FM Boombox: $74.83 Walmart eBay
Pros: Extremely good value. Reasonably deep bass, though not as deep as something like the JBL Xtreme 3, Soundcore Boom 2, or Tribit Stormbox Lava. IPX7 waterproof and floats. FM radio with 10 presets. 6 multicolor LED lighting effects. Can run on battery or corded power.
Cons: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size. No custom EQ. Only available in the United States and Canada.
Full onn Portable FM Boombox review and specifications →
| Amplifier Power | 25W RMS (100W peak) |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 13.8" x 5.9" x 7.7" (350 x 149 x 195 mm) |
| Discontinued | No |
| Drivers | 2 speakers |
| EQ | No |
| FM Tuner | Yes (10 presets) |
| IP Rating | IPX7 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Party Sync, pairs with 1 other onn. speaker) |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Removable Battery | No |
| TWS | Yes |
| Weight | 4.9 lbs (2.22 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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