These are not really the same size class, and that is the honest framing here. The Earfun Uboom Slim ranks #38 of 134 medium speakers at $79; the W-King T9 ranks #37 of 75 large speakers at $78.83.
What the Earfun Uboom Slim gets right: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation. Set against that: Not as deep bass as others.
On the W-King T9 side: 80W output power, 106dB max volume, 24-hour battery life, power bank function, Bluetooth 5.3 with 100ft range. The catch: Peaks in the upper mids which makes it sound a bit harsh.
Buy the Earfun Uboom Slim at $79 if you want a medium speaker. Buy the W-King T9 at $78.83 if you want a large speaker instead.
Specifications Side By Side
| Earfun Uboom Slim | W-King T9 | |
|---|---|---|
| Price | $79 | $78.83 |
| Ranked | #38 of 134 in Medium Size Portable Bluetooth Speakers | #37 of 75 in Large Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | 47Hz |
| Battery Life | 16 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Weight | 1.2 lbs / 560 g | 10.1 lbs / 4.6 kg |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 5.3 |
| Built in Microphone | Yes | Yes |
| Drivers | 45mm speaker drivers | 2x 4.04" subwoofers + drivers |
| Output Power | 20W | 80W |
| IP Rating | IPX7 | None |
| Aux Input | - | Yes |
| Max Volume | - | 106dB |
| MicroSD Playback | - | Yes |
| Power Bank | - | Yes |
| TWS | - | Yes |
| App | - | No |
| EQ | - | No |
| Party Mode | - | No |
| Dimensions | - | 30cm x 15cm x 12cm |
The Two Speakers In Full
Earfun Uboom Slim: $79
Pros: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability
Cons: Not as deep bass as others. Warm tuned, peaks in the mids and lower treble, rolled off upper treble
| Bass Extension (-10dB) | ~63Hz |
|---|---|
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Drivers | 45mm speaker drivers |
| IP Rating | IPX7 |
| Output Power | 20W |
| Power Input | USB-C |
| Stereo | Yes |
| Weight | 1.2 lbs / 560 g |
- Reviews, Comparisons and Sound Samples
- Links
W-King T9: $78.83 Aliexpress Amazon
Pros: 80W output power, 106dB max volume, 24-hour battery life, power bank function, Bluetooth 5.3 with 100ft range, TWS stereo pairing with wireless microphone, dual subwoofers, RGB lighting, MicroSD and AUX support, USB-C charging, karaoke capability
Cons: Peaks in the upper mids which makes it sound a bit harsh.
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 47Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Dimensions | 30cm x 15cm x 12cm |
| Drivers | 2x 4.04" subwoofers + drivers |
| EQ | No |
| IP Rating | None |
| Max Volume | 106dB |
| MicroSD Playback | Yes |
| Output Power | 80W |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 10.1 lbs / 4.6 kg |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: W-King t9 party speaker vs Soundcore Rave Neo and Trance (Rave Mega) 🥳
- Alan Ross Reviews: W-King T9 or Soundcore Motion Boom - King vs World Champion! 👌
- Jay’s Straight Up Reviews & More: W-King T9 🆚 ONN Large Party Speaker -By Request for Big Tee. Can the Smaller T9 Hang With The ONN?
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.