Short answer: the Marshall Stockwell III on measured sound quality, the Zealot S67 on price. The Marshall Stockwell III ranks #56 of 78 large speakers at $249.99. The Zealot S67 ranks #77 at $70.94, $179.05 cheaper.
What the Zealot S67 offers: It offers a lot of practical hardware for a 2.4kg budget speaker: IPX6 water resistance, USB-C charging, aux and microSD playback, speakerphone, a claimed 20-hour battery and TWS pairing for a second unit. The large enclosure and dual-driver/passive-radiator layout can provide useful party-level volume. Watch for: Sound quality is the catch. Independent reviewer comparisons report obvious distortion once volume rises past roughly halfway, little true deep bass, and a rolled-off, low-detail treble. There is no app or real EQ to correct that balance, so its long feature list does not make it a good pick for attentive music listening.
What the Marshall Stockwell III offers: 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. Doubles as a USB-C power bank. IP55 dust/water resistance. App includes parametric EQ, a Soundstage widening control, and wall/corner placement compensation. Endless-rotation control knobs. Watch for: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then. Bass tends to sound resonant and boomy, with reported frequency cancellation and phase issues on complex material that EQ doesn’t fully resolve. Oluv’s A/B testing against the outgoing Stockwell 2 finds the default tuning muffled and muddy enough to prefer the seven-year-old original out of the box, and output loses dynamics and bass while turning harsh well below maximum volume. No aptX support.
Buy the Zealot S67 when the price outweighs sound quality for you, and the Marshall Stockwell III when sound quality outweighs the price instead.
If sound quality matters at all to you, skip the Zealot S67. It ranks near the bottom of the 78 large speakers, so look higher up the list instead.
Battery life favors the Marshall Stockwell III: rated for 40 hours against 20 hours for the Zealot S67.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Zealot S67 | Marshall Stockwell III | |
|---|---|---|
| Price | $70.94 | $249.99 |
| Ranked | #77 of 78 in Large Size Portable Bluetooth Speakers | #56 of 78 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| IP Rating | IPX6 | IP55 |
| MicroSD Playback | Yes | - |
| Weight | 5.3 lbs (2.4 kg) | 2.9 lbs (1.3 kg) |
| App | No | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LE Audio with LC3 |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (parametric, via app) |
| Party Mode | No | - |
| Power Bank | No | Yes |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| TWS | Yes | - |
| Bluetooth Version | 5.2 | 5.3 |
| Dimensions | 11.6" x 4.8" x 5.2" (294 x 122 x 132 mm) | 7.1" x 6.4" x 2.9" (180 x 162 x 74 mm) |
| Amplifier Power | 60W | 44W |
| Drivers | 60W: Dual drivers + passive radiator | 1x 3" woofer, 2x 1.75" wide-band drivers |
| Digital Aux Input | No | No |
| Frequency Response | - | 54Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
More top alternatives to Marshall Stockwell III:
- Marshall Stockwell III vs Vifa Helsinki
- Marshall Stockwell III vs JBL Xtreme 5
- Marshall Stockwell III vs Tribit Stormbox Lava
- Marshall Stockwell III vs Brane X
- Marshall Stockwell III vs Minirig 4 with subwoofer
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
Zealot S67: $70.94 Aliexpress eBay
Pros: It offers a lot of practical hardware for a 2.4kg budget speaker: IPX6 water resistance, USB-C charging, aux and microSD playback, speakerphone, a claimed 20-hour battery and TWS pairing for a second unit. The large enclosure and dual-driver/passive-radiator layout can provide useful party-level volume.
Cons: Sound quality is the catch. Independent reviewer comparisons report obvious distortion once volume rises past roughly halfway, little true deep bass, and a rolled-off, low-detail treble. There is no app or real EQ to correct that balance, so its long feature list does not make it a good pick for attentive music listening.
Full Zealot S67 review and specifications →
| Amplifier Power | 60W |
|---|---|
| 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 |
| 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?
- Head-to-Head Comparisons
Marshall Stockwell III: $249.99 Marshall eBay
Pros: 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. Doubles as a USB-C power bank. IP55 dust/water resistance. App includes parametric EQ, a Soundstage widening control, and wall/corner placement compensation. Endless-rotation control knobs.
Cons: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then. Bass tends to sound resonant and boomy, with reported frequency cancellation and phase issues on complex material that EQ doesn’t fully resolve. Oluv’s A/B testing against the outgoing Stockwell 2 finds the default tuning muffled and muddy enough to prefer the seven-year-old original out of the box, and output loses dynamics and bass while turning harsh well below maximum volume. No aptX support.
Full Marshall Stockwell III review and specifications →
| Amplifier Power | 44W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 40+ hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 7.1" x 6.4" x 2.9" (180 x 162 x 74 mm) |
| Drivers | 1x 3" woofer, 2x 1.75" wide-band drivers |
| EQ | Yes (parametric, via app) |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP55 |
| Omnidirectional | Yes |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Partially |
| Weight | 2.9 lbs (1.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Marshall Stockwell III vs Xdobo X8 Max
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- Marshall Stockwell III vs Zealot S97
- Marshall Stockwell III vs W-King D9
- Marshall Stockwell III vs W-King D8
- Marshall Stockwell III vs Sony SRS-XB43
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