Short answer: the B&O Beolit 20 if sound quality matters most, the Zealot S78 if price matters most. The B&O Beolit 20 ranks #48 of 112 boombox speakers, rated 3.4/5, at $749. The Zealot S78 ranks #110, rated 2.0/5, at $91.38, $657.62 cheaper.
The B&O Beolit 20 is the better-sounding, lighter choice. A premium designer portable with 360 degree sound and a top that doubles as a wireless phone charger. At 6 lbs (2.7 kg) it weighs much less than the Zealot S78 at 9.7 lbs (4.4 kg).
The Zealot S78 is the longer-running, tougher option. A loud, rugged party speaker with full waterproofing, a power bank and wireless pairing for outdoor parties. It is rated for 40 hours of battery against 8 for the B&O Beolit 20. It is rated IP67 against IPX4 for the B&O Beolit 20. It plays in stereo from a single unit, unlike the B&O Beolit 20. The catch: At high volume, reviews report distortion and fluctuating level, so its headline power is more useful below its maximum setting.
Buy the B&O Beolit 20 when sound quality outweighs the price for you, and the Zealot S78 when the price outweighs sound quality instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A premium designer portable with 360 degree sound and a top that doubles as a wireless phone charger.
A loud, rugged party speaker with full waterproofing, a power bank and wireless pairing for outdoor parties.
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
| B&O Beolit 20 | Zealot S78 | |
|---|---|---|
| Price | $749.00 | $91.38 |
| Ranked | #48 of 112 in Boombox Size Portable Bluetooth Speakers | #110 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Bang & Olufsen app) | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 45Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | Yes (multiple modes) |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | Yes | Yes |
| Weight | 6 lbs (2.7 kg) | 9.7 lbs (4.4 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Party Mode | No | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| USB Playback | No | Yes |
| Built-in Microphone | Yes | No |
| Power Input | USB-C | USB-C |
| Amplifier Power | 240W peak | 120W RMS / 150W peak |
| Dimensions | 5.3” x 9.1” x 7.4” (135 x 230 x 189 mm) | 16.1” x 6.6” x 7.3” (410 x 167 x 185 mm) |
| Drivers | 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators | 2x ~120mm (4.72”) woofers + 2x ~42mm tweeters + 2x passive radiators |
| IP Rating | IPX4 | IP67 |
| Maximum SPL | 93dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 5.3 |
| Strap | Yes (built-in strap) | Yes (detachable shoulder strap) |
| MicroSD Playback | - | Yes |
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