Short answer: the EcoXGear EcoBoulder Ultra, though neither ranks well in its class. It ranks #90 of 111 boombox speakers by sound quality, rated 2.4/5, at $199.99; the EcoXGear EcoBoulder+ ranks #96, rated 2.3/5, at $199.99. The price gap is small enough that the sound-quality ranking should decide it. Both are rated below 3.0/5 among the 111 boombox speakers; for better sound, the Tribit Stormbox Blast ranks #2 at $179.99.
Why pick the EcoXGear EcoBoulder+: Owners and reviewers describe it as loud with punchy bass at a tailgate, and it plays up to 50 hours at moderate volume (about 10 at full) from a user replaceable sealed lead acid battery. Watch for: Its bass is nowhere near as deep as top ranked boomboxes like the Tribit Stormbox Blast and Harman Kardon Go + Play 3, which reach down to about 43 Hz and 35 Hz.
Why pick the EcoXGear EcoBoulder Ultra: An IP67 rated, floating boombox with an 8 inch driver, a 3 inch tweeter and an 8 inch passive woofer, claimed at 121 dB. It links with other speakers (EcoCast, up to 100 units), which the EcoXGear EcoBoulder+ cannot. The tradeoff: Its bass is nowhere near as deep as top ranked boomboxes like the Tribit Stormbox Blast and Harman Kardon Go + Play 3, which reach down to about 43 Hz and 35 Hz.
Buy the EcoXGear EcoBoulder Ultra. It is rated higher for sound quality than the EcoXGear EcoBoulder+ at the same price, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Owners and reviewers describe it as loud with punchy bass at a tailgate, and it plays up to 50 hours at moderate volume (about 10 at full) from a user replaceable sealed lead acid battery.
Amazon $199.99 eBay
An IP67 rated, floating boombox with an 8 inch driver, a 3 inch tweeter and an 8 inch passive woofer, claimed at 121 dB.
Amazon $199.99 eBayPrices on this page were last checked October 19, 2026 at 10:32 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
| EcoXGear EcoBoulder+ | EcoXGear EcoBoulder Ultra | |
|---|---|---|
| Price | $199.99 | $199.99 |
| Ranked | #96 of 111 in Boombox Size Portable Bluetooth Speakers | #90 of 111 in Boombox Size Portable Bluetooth Speakers |
| Drivers | 1x 8” driver + 1x 3” tweeter + 1x 8” passive radiator | 1x 8” driver + 1x 3” tweeter + 1x 8” passive radiator |
| Amplifier Power | 100W (peak) | 100W |
| Battery Life | 50 hours (Manufacturer specified) | 50 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.1 | 5.1 |
| Bluetooth Codecs | SBC | SBC |
| Weight | 29.1 lbs (13.2 kg) | 28 lbs (12.7 kg) |
| Dimensions | 15” x 20” x 12” (381 x 508 x 305 mm) | 15.5” x 19.8” x 11.3” (394 x 503 x 287 mm) |
| Aux Input | Yes | Yes |
| Microphone Input | Yes | - |
| Built-in Microphone | Yes | - |
| USB Playback | No | - |
| Power Bank | Yes (USB-A) | Yes (USB-C) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes (sealed lead acid) | - |
| TWS | Yes (EcoConnect, 2 units) | Yes (EcoCast) |
| Party Mode | No | Yes (EcoCast, up to 100 units) |
| App | No | Yes (lights only) |
| EQ | Yes (5 presets, bass and treble) | Yes (5 presets, bass and treble) |
| Stereo | No | No |
| Strap | No (built-in handle) | No (built-in handle) |
| Lights | No | Yes |
| FM Tuner | Yes (AM/FM) | Yes (AM/FM) |
| Wheels | No | Yes |
| Omnidirectional | No | No |
| Maximum SPL | - | 121 dB (Manufacturer specified) |
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