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 #33 of 75 boombox speakers at $599.99. The Zealot S78 ranks #75 at $159.68, $440.31 cheaper.
What the B&O Beolit 20 offers: B&O Beolit 20 uses 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators. Its 2.7 kg, claimed 8 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 93dB and mono playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its 45Hz specification.
What the Zealot S78 offers: A robust 4.4kg party speaker with claimed 120W RMS output, IP67 protection, USB-C charging, a power-bank function, aux, USB and microSD playback, TWS pairing and multiple EQ modes. Reviews find it very loud with useful bass and long claimed battery life, making it a credible choice for outdoor gatherings. Watch for: At high volume, reviews report distortion and fluctuating level, so its headline power is more useful below its maximum setting. It has no app-based EQ, and the bass and midrange refinement do not match better-established boombox speakers; assess its sound in person if tonal accuracy matters.
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.
The Zealot S78 is not a sound-quality pick. It sits near the bottom of the 75 boombox speakers; there are better options higher up.
There is a real battery-life gap here: the Zealot S78 is rated for 40 hours, the B&O Beolit 20 only 8 hours.
Water resistance is not close: the Zealot S78 is rated at IP67 (brief submersion), well ahead of the B&O Beolit 20 at IPX4 (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| B&O Beolit 20 | Zealot S78 | |
|---|---|---|
| Price | $599.99 | $159.68 |
| Ranked | #33 of 75 in Boombox Size Portable Bluetooth Speakers | #75 of 75 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 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 |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
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- JBL Partybox Encore 2 vs B&O Beolit 20
- JBL Partybox Encore Essential 2 vs B&O Beolit 20
- JBL Partybox Encore vs B&O Beolit 20
Prices on this page were last checked September 16, 2026 at 12:41 AM 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
B&O Beolit 20: $599.99 Amazon eBay
Pros: B&O Beolit 20 uses 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators. Its 2.7 kg, claimed 8 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 93dB and mono playback make it a practical option for its intended room or portable use. Measured bass extension of 45Hz (-10dB).
Cons: Bass is limited by its 45Hz specification.
Full B&O Beolit 20 review and specifications →
| Amplifier Power | 240W peak |
|---|---|
| App | Yes (Bang & Olufsen app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 5.3" x 9.1" x 7.4" (135 x 230 x 189 mm) |
| Drivers | 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators |
| EQ | Yes (App EQ) |
| IP Rating | IPX4 |
| Maximum SPL | 93dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 6 lbs (2.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: B&O Beolit 20 vs Earfun UBoom X - everything fake? More from Oluv’Sone →
- Joy & Oluv’Sone: $600 premium Bluetooth speaker vs $115 cheapo UBoom X
- techkiste.net: B&O Beolit 20 vs Vifa Copenhagen 2.0 sound-comparison with different music-genres
- Oluv Patreon: B&O Beolit 20 - frequency response measurements
- Head-to-Head Comparisons
Zealot S78: $159.68 Amazon Aliexpress eBay
Pros: A robust 4.4kg party speaker with claimed 120W RMS output, IP67 protection, USB-C charging, a power-bank function, aux, USB and microSD playback, TWS pairing and multiple EQ modes. Reviews find it very loud with useful bass and long claimed battery life, making it a credible choice for outdoor gatherings.
Cons: At high volume, reviews report distortion and fluctuating level, so its headline power is more useful below its maximum setting. It has no app-based EQ, and the bass and midrange refinement do not match better-established boombox speakers; assess its sound in person if tonal accuracy matters.
Full Zealot S78 review and specifications →
| Amplifier Power | 120W RMS / 150W peak |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.1" x 6.6" x 7.3" (410 x 167 x 185 mm) |
| Drivers | 2x ~120mm (4.72") woofers + 2x ~42mm tweeters + 2x passive radiators |
| EQ | Yes (multiple modes) |
| IP Rating | IP67 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 9.7 lbs (4.4 kg) |
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: W-King X20 vs Zealot S78 Bluetooth Boombox Battle Outdoor Tailgater Special 🚗 Let the Whoopin’ Begin More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: DBSOARS F29 Max vs Zealot S78 🛜 (5B) Budget Bluetooth Boombox Basement Battle 🔊 Bass Modes Enabled
- Head-to-Head Comparisons