Short answer: the Minirig 4 with subwoofer. It ranks #5 of 115 large speakers by sound quality, rated 4.6/5, at $290. The Ultimate Ears Epicboom ranks #84, rated 2.9/5, at $228.59, $61.41 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Minirig 4 with subwoofer is the better-sounding, longer-running pick. A compact speaker and wireless subwoofer pair with some of the most balanced sound available, a long battery and deep, impactful bass. It is rated for 30 hours of battery against 17 for the Ultimate Ears Epicboom. At 3.2 lbs (1.44 kg) it weighs noticeably less than the Ultimate Ears Epicboom at 4.3 lbs (1.97 kg). It has an adjustable EQ, which the Ultimate Ears Epicboom lacks. Watch for: Not stereo, app is buggy.
The Ultimate Ears Epicboom is the tougher option. A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging. It is rated IPX7 against Splash resistant for the Minirig 4 with subwoofer. It plays in stereo from a single unit, unlike the Minirig 4 with subwoofer. Watch for: Not very deep bass for the size.
Buy the Minirig 4 with subwoofer. It is rated higher for sound quality, and the $61.41 you would save on the Ultimate Ears Epicboom does not close the gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A compact speaker and wireless subwoofer pair with some of the most balanced sound available, a long battery and deep, impactful bass.
A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Minirig 4 with subwoofer | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $290 | $228.59 |
| Ranked | #5 of 115 in Large Size Portable Bluetooth Speakers | #84 of 115 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Battery Life | 30 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | Splash resistant | IPX7 |
| Bluetooth Latency | 60ms | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| TWS | Yes (Bluetooth or cable) | Yes |
| Weight | 3.2 lbs (1.44 kg) | 4.3 lbs (1.97 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Party Mode | No | No |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 4” x 2.9” (101.6 x 73 mm) (diameter x height) | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Drivers | 70mm custom driver | 1x 120mm woofer, 2x 45mm tweeters |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 50W | 10W RMS |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | ~55Hz |
| Maximum SPL | - | 94dB (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
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