Short answer: the Ultimate Ears Boom 4, though neither ranks well in its class. It ranks #110 of 164 medium speakers by sound quality (rated 2.9/5) at $149.99 and is still sold new; the EFM Toledo ranks #152 (rated 2.2/5) and is discontinued, so it is only an option used. Both are rated below 3.0/5 among the 164 medium speakers, and the Earfun Uboom L, ranked #2 at $49.79, is a better place to start if sound quality matters.
The Ultimate Ears Boom 4 is the better-sounding option. IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. It plays in stereo from a single unit, unlike the EFM Toledo. It charges over USB-C rather than Micro USB. The catch: Not much improvement over the old ones.
The case for the EFM Toledo: A compact 1.1 lbs (500 g) speaker with dual drivers, IPX6 protection, speakerphone capability, TWS pairing and a claimed 15-hour battery life. Watch for: With only 10W output, bass is very limited and treble rolls off early, so music lacks the weight, detail and headroom of stronger portable speakers.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality and still sold new, while the EFM Toledo is discontinued.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Boom 4 | EFM Toledo | |
|---|---|---|
| Price | $149.99 | $99 Discontinued |
| Ranked | #110 of 164 in Medium Size Portable Bluetooth Speakers | #152 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX6 |
| Power Input | USB-C | Micro USB |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 1.1 lbs (0.5 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | - |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 3.9” x 3.9” x 9.1” (100 x 100 x 230 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 2x drivers |
| TWS | Yes | Yes |
| EQ | Yes (via app) | - |
| Built-in Microphone | No | Yes |
| Power Bank | No | No |
| Aux Input | No | No |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Amplifier Power | - | 10W |
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Prices on this page were last checked October 4, 2026 at 9:58 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 Boom 4: $149.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
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EFM Toledo: $99 Discontinued eBay
Pros: A compact 500g speaker with dual drivers, IPX6 protection, speakerphone capability, TWS pairing and a claimed 15-hour battery life. Its simple, rugged format makes it easy to carry for podcasts, background music and casual use around water.
Cons: With only 10W output, bass is very limited and treble rolls off early, so music lacks the weight, detail and headroom of stronger portable speakers. It has no aux input, app or EQ, and this discontinued model is best considered only if its compact weather-resistant design is the priority.
Full EFM Toledo review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.9” x 3.9” x 9.1” (100 x 100 x 230 mm) |
| Drivers | 2x drivers |
| IP Rating | IPX6 |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | Micro USB |
| Stereo | No |
| TWS | Yes |
| Weight | 1.1 lbs (0.5 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons