Short answer: the EarFun Uboom L. It ranks #2 of 182 medium speakers by sound quality (rated 4.6/5) at $49.79 and is still sold new; the JBL Charge 4 ranks #59 (rated 3.5/5) and is discontinued, so it is only an option used. The JBL Charge 4’s replacement, the JBL Charge 6, is rated 4.2/5 at $149.95.
The EarFun Uboom L is the better-sounding, louder option. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. Alan Ross Reviews measured it at 103dB at full volume, against 99dB for the JBL Charge 4. At 1.4 lbs (650 g) it weighs noticeably less than the JBL Charge 4 at 2.1 lbs (960 g). It supports AAC Bluetooth, which the JBL Charge 4 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 JBL Charge 4 does well: A rugged waterproof speaker that floats, charges your phone, lasts a long time per charge and links with other JBL speakers. It links with other speakers (Connect+ up to 100 speakers), which the EarFun Uboom L cannot. The catch: 1 Oval driver.
Buy the EarFun Uboom L. It is rated higher for sound quality; the JBL Charge 4 is no longer sold new.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Measured Differences
- Output: the EarFun Uboom L was measured at 103 dB maximum against 99 dB for the JBL Charge 4, so it gets somewhat louder before it runs out of headroom.
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Specifications Side By Side
| EarFun Uboom L | JBL Charge 4 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $119.95 Discontinued |
| Ranked | #2 of 182 in Medium Size Portable Bluetooth Speakers | #59 of 182 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes |
| Aux Input | Yes | Yes |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | 54Hz |
| Battery Life | 16 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | - |
| EQ | Yes (10 band, firmware >= 1.2.6) | No |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | 330ms |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | 99dB (measured by Alan Ross Reviews) |
| Party Mode | No | Yes (Connect+ up to 100 speakers) |
| Power Bank | No | Yes (USB-A, 5V/2A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.4 lbs (650 g) | 2.1 lbs (960 g) |
| Bluetooth Version | 5.0 | 4.2 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 8.7” x 3.7” x 3.7” (220 x 95 x 93 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 1x 51x89mm fullrange |
| Amplifier Power | 28W | 30W RMS |
| Digital Aux Input | No | No |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| Strap | - | No |
Where the Ratings Come From
- EarFun Uboom L: reviews by Joy & Oluv’Sone, Oluv and Alan Ross.
- JBL Charge 4: reviews by Alan Ross, Flossy Carter and DankPods.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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