Short answer: the Bogasing S8 Pro Max. It ranks #24 of 105 large speakers by sound quality, rated 4.2/5, at $168.99; the Marshall Stockwell III ranks #78, rated 3.0/5, and costs $249.99, so there is little reason to consider the other one.
The Bogasing S8 Pro Max is the better-sounding pick. A true three way stereo design in an aluminium body: a 70mm woofer, two 52mm midrange drivers and two 31mm silk tweeters angled outward, backed by two 80mm passive radiators. The catch: Its tuning is bright: the 3D mode pushes the mids and treble hard, can sound sharp or tiring at higher volumes, and sometimes adds an echo effect to vocals.
The Marshall Stockwell III is the longer-running option. 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. It is rated for 40 hours of battery against 30 for the Bogasing S8 Pro Max. It supports AAC Bluetooth, which the Bogasing S8 Pro Max lacks. It has an adjustable EQ, which the Bogasing S8 Pro Max lacks. The catch: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
Buy the Bogasing S8 Pro Max. It is rated higher for sound quality than the Marshall Stockwell III and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
A true three way stereo design in an aluminium body: a 70mm woofer, two 52mm midrange drivers and two 31mm silk tweeters angled outward, backed by two 80mm passive radiators.
Amazon $168.99 eBay
40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles.
Marshall $249.99 eBayPrices on this page were last checked October 17, 2026 at 6:04 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
| Bogasing S8 Pro Max | Marshall Stockwell III | |
|---|---|---|
| Price | $168.99 | $249.99 |
| Ranked | #24 of 105 in Large Size Portable Bluetooth Speakers | #78 of 105 in Large Size Portable Bluetooth Speakers |
| Battery Life | 30 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Drivers | 70mm woofer + 2x 52mm midrange + 2x 31mm silk tweeters + 2x 80mm passive radiators | 1x 3” woofer, 2x 1.75” wide-band drivers |
| Amplifier Power | 100W (40W woofer, 2x 20W midrange, 2x 10W tweeters) | 44W |
| Dimensions | 4.3”H x 11.1”W x 2.6”D (110 x 281 x 65 mm) | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Weight | 3.4 lbs (1.55 kg) | 2.9 lbs (1.3 kg) |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| App | No | Yes |
| EQ | No | Yes (parametric, via app) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Bluetooth Codecs | SBC | SBC, AAC, LE Audio with LC3 |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| MicroSD Playback | Yes | - |
| USB Playback | Yes | - |
| Built-in Microphone | Yes | - |
| Frequency Response | - | 54Hz - 20kHz (Manufacturer specified) |
| IP Rating | - | IP55 |
| Power Bank | - | Yes |
| Strap | - | Yes (detachable strap) |
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