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 Zealot S97 ranks #66 of 120 large speakers by sound quality at $79.98.
The EarFun Uboom L is the longer-running, lighter choice. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. It is rated for 16 hours of battery against 12 for the Zealot S97. At 1.4 lbs (650 g) it weighs much less than the Zealot S97 at 7.3 lbs (3.3 kg). It supports AAC Bluetooth, which the Zealot S97 lacks. Watch for: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
What the Zealot S97 does well: A budget boombox with surprisingly deep bass for its size, waterproofing, power bank outputs, and microSD and aux playback. It links with other speakers (PartyAdd up to 100 speakers), which the EarFun Uboom L cannot. The tradeoff: It is not especially loud for its size, battery life is only a claimed 12 hours, and the bass preset can swamp the rest of the music.
Buy the EarFun Uboom L at $49.79 if you want a medium speaker. Buy the Zealot S97 at $79.98 if you want a large 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 | Zealot S97 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $79.98 |
| Ranked | #2 of 179 in Medium Size Portable Bluetooth Speakers | #66 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | No |
| Aux Input | Yes | Yes |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (10 band, firmware >= 1.2.6) | 3 EQ presets |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | Yes (PartyAdd up to 100 speakers) |
| Power Bank | No | Yes (USB-A + USB-C) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.4 lbs (650 g) | 7.3 lbs (3.3 kg) |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 12.6” x 7.3” x 5.9” (321 x 185 x 151 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 2x 76mm (3”) woofers + 2x 38mm tweeters + 2x passive radiators |
| Amplifier Power | 28W | 80W |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
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