Short answer: the Marshall Kilburn II for better sound quality, the Zealot S67 for the lower price. The Marshall Kilburn II ranks #36 of 77 large speakers at $279. The Zealot S67 ranks #76 at $80, $199 cheaper.
What the Marshall Kilburn II offers: 20W Class D amp + dual 8W tweeters. 20+ hour battery with quick-charge (20 min charges 3 hours of play). Rugged design with leather handle and reinforced corners, IPX2 rated. Thrives with rock music. Bluetooth 5.0 with 30ft range. Watch for: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak. Very low IPX2 water rating. AC charging
What the Zealot S67 offers: 60W output power, 20-hour battery life, IPX6 waterproof, Bluetooth 5.2, TWS stereo pairing, EQ with 3 sound modes, dual drivers with passive radiator, MicroSD and AUX support, built-in microphone, USB-C charging Watch for: A lot of distortion above 50%, no deep bass, rolled off treble. Just not a good sounding speaker.
Buy the Marshall Kilburn II if sound quality is the priority over the price, or the Zealot S67 if the price is the priority over sound quality.
If sound quality matters at all to you, skip the Zealot S67. It ranks near the bottom of the 77 large speakers, so look higher up the list instead.
If water resistance matters to you, the Zealot S67 at IPX6 (powerful water jets) holds up far better than the Marshall Kilburn II at IPX2 (light drips).
Specifications Side By Side
| Marshall Kilburn II | Zealot S67 | |
|---|---|---|
| Price | $279.00 | $80 |
| Ranked | #36 of 77 in Large Size Portable Bluetooth Speakers | #76 of 77 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~58Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| IP Rating | IPX2 | IPX6 |
| Weight | 5.5 lbs / 2.49 kg | 5.3 lbs / 2.4 kg |
| App | No | No |
| Bluetooth Codecs | SBC | SBC |
| Built in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Output Power | 36W | 60W |
| Dimensions | 9.6" x 6.4" x 5.5" (243 x 162 x 140 mm) | 11.6" x 4.8" x 5.2" (294 x 122 x 132 mm) |
| Drivers | 1x 4" (102mm) woofer + 2x 20mm dome tweeters | 60W: Dual drivers + passive radiator |
| Max Volume | 102dB | - |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
| Bluetooth Version | - | 5.2 |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Soundcore Trance/Rave Mega vs Doss Extreme Boom
- JBL Xtreme 5 vs T&G 118
- JBL Xtreme 4 vs Zealot S97
- Marshall Kilburn II vs Soundcore Select Pro
- Marshall Kilburn II vs Soundcore Rave Neo
Prices on this page were last checked August 27, 2026 at 10:09 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
Marshall Kilburn II: $279.00 Amazon eBay
Pros: 20W Class D amp + dual 8W tweeters. 20+ hour battery with quick-charge (20 min charges 3 hours of play). Rugged design with leather handle and reinforced corners, IPX2 rated. Thrives with rock music. Bluetooth 5.0 with 30ft range.
Cons: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak. Very low IPX2 water rating. AC charging
Full Marshall Kilburn II review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~58Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.6" x 6.4" x 5.5" (243 x 162 x 140 mm) |
| Drivers | 1x 4" (102mm) woofer + 2x 20mm dome tweeters |
| EQ | No |
| IP Rating | IPX2 |
| Max Volume | 102dB |
| Omnidirectional | No |
| Output Power | 36W |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.5 lbs / 2.49 kg |
- Reviews, Comparisons and Sound Samples
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- Marshall Kilburn II vs JBL Xtreme 4
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Zealot S67: $80 Amazon Aliexpress eBay
Pros: 60W output power, 20-hour battery life, IPX6 waterproof, Bluetooth 5.2, TWS stereo pairing, EQ with 3 sound modes, dual drivers with passive radiator, MicroSD and AUX support, built-in microphone, USB-C charging
Cons: A lot of distortion above 50%, no deep bass, rolled off treble. Just not a good sounding speaker.
Full Zealot S67 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.6" x 4.8" x 5.2" (294 x 122 x 132 mm) |
| Drivers | 60W: Dual drivers + passive radiator |
| EQ | No |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 60W |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.3 lbs / 2.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: ZEALOT S-67 🦨 75w Bluetooth Speaker Review🤦🏼♂️ & Comparison With W-King X10. More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: On a Ledge 🪟 Zealot S67 🆚 Soundcore Select Pro - Bluetooth Speaker Comparison
- Jay’s Straight Up Reviews & More: Ortizan M8🦨 Bluetooth Speaker. Is This The Budget JBL Xtreme 3 Killer? Better Than Zealot S67?
- Reddit Search for Zealot S67 Review
- Head-to-Head Comparisons