Short answer: the Ultimate Ears Epicboom for better sound quality, the W-King D9 for the lower price. The Ultimate Ears Epicboom ranks #57 of 77 large speakers at $213.41. The W-King D9 ranks #65 at $71.24, $142.17 cheaper.
What the Ultimate Ears Epicboom offers: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Made mostly from recycled fabric and plastic. Large best-sounding UE portable that still feels portable. 180ft Bluetooth range. Watch for: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
What the W-King D9 offers: 60W RMS output, 106dB max volume, exceptional 40-hour battery life, power bank function, IPX6 waterproof, MicroSD and AUX support, dual drivers with passive radiators, Bluetooth 5.3, USB-C charging, EQ button, shockproof design Watch for: Very rolled off treble.
Buy the Ultimate Ears Epicboom when sound quality outweighs the price for you, and the W-King D9 when the price outweighs sound quality instead.
If sound quality matters at all to you, skip the W-King D9. It ranks near the bottom of the 77 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 17 hours for the Ultimate Ears Epicboom.
Specifications Side By Side
| Ultimate Ears Epicboom | W-King D9 | |
|---|---|---|
| Price | $213.41 | $71.24 |
| Ranked | #57 of 77 in Large Size Portable Bluetooth Speakers | #65 of 77 in Large Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~55Hz | 47Hz |
| Battery Life | 17 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Weight | 4.3 lbs / 1.97 kg | 4.4 lbs / 2.0 kg |
| App | No | No |
| Aux Input | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built in Microphone | Yes | Yes |
| EQ | No | No |
| IP Rating | IPX7 | IPX6 |
| Party Mode | No | No |
| Power Bank | No | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Bluetooth Version | 5.2 | 5.3 |
| Drivers | 1x 120mm woofer, 2x 45mm tweeters | 2x 40mm drivers + passive radiators |
| Dimensions | 4.7" x 9.5" x 6.4" (119 x 241 x 162 mm) | 4.7" x 12.4" x 4.7" (120 x 315 x 120 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | 80Hz - 16kHz (Manufacturer specified) |
| Output Power | 10W RMS | 60W RMS |
| Max Volume | 94dB | 106dB |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Marshall Stockwell 2 vs Soundcore Rave Neo
- JBL Xtreme vs Soundcore Rave Neo
- Bose SoundLink Plus vs Soundcore Rave Neo
- Ultimate Ears Epicboom vs LG Xboom Go PL7
- Zealot S97 vs Ultimate Ears Epicboom
Prices on this page were last checked August 27, 2026 at 10:09 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
Ultimate Ears Epicboom: $213.41 Amazon eBay
Pros: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Made mostly from recycled fabric and plastic. Large best-sounding UE portable that still feels portable. 180ft Bluetooth range.
Cons: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
Full Ultimate Ears Epicboom review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.7" x 9.5" x 6.4" (119 x 241 x 162 mm) |
| Drivers | 1x 120mm woofer, 2x 45mm tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Max Volume | 94dB |
| Omnidirectional | No |
| Output Power | 10W RMS |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 4.3 lbs / 1.97 kg |
- Links
- Reviews, Comparisons and Sound Samples
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- Reddit Search for Ultimate Ears Epicboom Review
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W-King D9: $71.24 Amazon eBay
Pros: 60W RMS output, 106dB max volume, exceptional 40-hour battery life, power bank function, IPX6 waterproof, MicroSD and AUX support, dual drivers with passive radiators, Bluetooth 5.3, USB-C charging, EQ button, shockproof design
Cons: Very rolled off treble.
Full W-King D9 review and specifications →
| 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 |
| Max Volume | 106dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 60W RMS |
| 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