These sit in different size classes, so this is not a straight ranking comparison. The EarFun Uboom L ranks #2 of 179 medium speakers by sound quality at $49.79; the Monster Bluetooth Speaker ranks #39 of 62 small speakers by sound quality at $19.99.
The EarFun Uboom L is the deeper-bass, longer-running pick. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. Its bass reaches about 56Hz before falling 10dB, against 95Hz for the Monster Bluetooth Speaker. It is rated for 16 hours of battery against 6.5 for the Monster Bluetooth Speaker. It supports AAC Bluetooth, which the Monster Bluetooth Speaker lacks. The tradeoff: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
The Monster Bluetooth Speaker is the lighter choice. A very cheap, light waterproof travel speaker with USB-C charging, aux and microSD playback, and stereo pairing. At 0.4 lbs (185 g) it weighs much less than the EarFun Uboom L at 1.4 lbs (650 g). Watch for: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs.
Buy the EarFun Uboom L at $49.79 if you want a medium speaker. Buy the Monster Bluetooth Speaker at $19.99 if you want a small speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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
| EarFun Uboom L | Monster Bluetooth Speaker | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $19.99 |
| Ranked | #2 of 179 in Medium Size Portable Bluetooth Speakers | #39 of 62 in Small Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | No |
| Aux Input | Yes | Yes |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | 95Hz |
| Battery Life | 16 hours (Manufacturer specified) | 6.5 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (10 band, firmware >= 1.2.6) | No |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 0.4 lbs (185 g) |
| Bluetooth Version | 5.0 | 5.4 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | Specifications vary by model |
| Drivers | 2x 55mm drivers + 2x passive radiators | 1.4” (36mm) full-range driver |
| Amplifier Power | 28W | 5W |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
| Strap | - | Yes (carabiner hook, suction cup) |
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