Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Marshall Stockwell II ranks #11 of 120 large speakers by sound quality at $229.99; the JBL Boombox 4 ranks #20 of 113 boombox speakers by sound quality at $549.95.
The Marshall Stockwell II is the lighter option. A light, strap equipped speaker with some of the most natural sound around, even off to the side, and a long battery. At 3.1 lbs (1.4 kg) it weighs much less than the JBL Boombox 4 at 13.2 lbs (5.98 kg). It keeps a wired aux input, which the JBL Boombox 4 lacks. The catch: Not very loud, and the added DSP reverb may annoy purists.
The JBL Boombox 4 is the louder, longer-running choice. An extremely loud boombox for its size with fully waterproof, dustproof build, a long battery and a flexible app EQ. Alan Ross Reviews measured it at 115dB at full volume, against 96dB for the Marshall Stockwell II. It is rated for 28 hours of battery against 20 for the Marshall Stockwell II. It is rated IP68 against IPX4 for the Marshall Stockwell II. The catch: Pretty overpriced for the category.
Buy the Marshall Stockwell II at $229.99 if you want a large speaker. Buy the JBL Boombox 4 at $549.95 if you want a boombox speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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
| Marshall Stockwell II | JBL Boombox 4 | |
|---|---|---|
| Price | $229.99 | $549.95 |
| Ranked | #11 of 120 in Large Size Portable Bluetooth Speakers | #20 of 113 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 44Hz | 41Hz |
| Battery Life | 20 hours (Manufacturer specified) | 28 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, LC3, AAC |
| IP Rating | IPX4 | IP68 |
| Bluetooth Latency | 50ms | AAC 144ms, SBC 48ms |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 115dB (measured by Alan Ross Reviews) |
| Party Mode | No | Yes (Auracast) |
| Power Input | USB-C | AC Power cord |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Weight | 3.1 lbs (1.4 kg) | 13.2 lbs (5.98 kg) |
| App | No | Yes |
| Built-in Microphone | Yes | No |
| EQ | No | Yes (7 band) |
| Power Bank | No | Yes (USB-C, up to 30W) |
| Bluetooth Version | 5.0 | 5.4 |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) | 20.1” x 10.2” x 8.3” (510 x 260 x 210 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters | 2x 123mm woofers + 2x 20mm tweeters with passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 20W | 210W AC / 200W battery |
| Digital Aux Input | No | Yes (USB-C) |
| Strap | Yes (built-in strap) | No |
| Removable Battery | - | Yes |
| USB Playback | - | No |
| FM Tuner | - | No |
| Microphone Input | - | No |
| MicroSD Playback | - | No |
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