Short answer: the Monster Bluetooth Speaker, if you are buying new. The Marshall Willen ranks higher than it (#14 vs #36 of 54 small speakers, 3.8/5 vs 3.0/5) but is discontinued, so only consider it used; the Monster Bluetooth Speaker is still sold new at $19.99.
The Marshall Willen is the better-sounding, deeper-bass option. Exceptionally clear vocals for a mono speaker. Its bass reaches about 75Hz before falling 10dB, against 95Hz for the Monster Bluetooth Speaker. It is rated for 15 hours of battery against 6.5 for the Monster Bluetooth Speaker. It links with other speakers (Marshall Stack), which the Monster Bluetooth Speaker cannot. The catch: Not that deep of bass.
The Monster Bluetooth Speaker is the lighter choice. A very light, IPX7-rated mini speaker with USB-C charging, aux and microSD playback, speakerphone support and TWS pairing. At 0.4 lbs (185 g) it weighs much less than the Marshall Willen at 0.7 lbs (309 g). It keeps a wired aux input, which the Marshall Willen lacks. The tradeoff: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs.
Buy the Monster Bluetooth Speaker if you want one new; the Marshall Willen is discontinued, so only look for it used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Willen | Monster Bluetooth Speaker | |
|---|---|---|
| Price | $89.99 Discontinued | $19.99 |
| Ranked | #14 of 54 in Small Size Portable Bluetooth Speakers | #36 of 54 in Small Size Portable Bluetooth Speakers |
| App | Yes | No |
| Bass Extension (-10dB) | 75Hz | 95Hz |
| Battery Life | 15 hours (Manufacturer specified) | 6.5 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Marshall Stack) | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | No | Yes |
| Weight | 0.7 lbs (309 g) | 0.4 lbs (185 g) |
| Aux Input | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.1 | - |
| Drivers | 2” (51mm) full-range with dual passive radiators | 1.4” (36mm) full-range driver |
| Dimensions | 4” x 1.5” x 4” (101 x 39 x 101 mm) | Specifications vary by model |
| Amplifier Power | 10W | 5W |
| Maximum SPL | 88dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (carabiner hook, suction cup) |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
How Marshall Willen compares with other leading options:
- Marshall Willen vs Tribit Stormbox Micro 2
- Soundcore Boom Go 3i vs Marshall Willen
- Tribit Stormbox Micro vs Marshall Willen
- Tribit Stormbox Micro 3 vs Marshall Willen
- Teufel Boomster Go vs Marshall Willen
Prices on this page were last checked October 4, 2026 at 9:58 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 Willen: $89.99 Discontinued Amazon eBay
Newer model: the Marshall Willen II, ranked higher, rated 4/5.
Pros: Exceptionally clear vocals for a mono speaker. Solid, durable build with IP67 water/dust resistance. Extremely compact: fits in a back pocket. Measured bass extension of 75Hz (-10dB).
Cons: Not that deep of bass. A bit of a sharp treble. Discontinued.
Full Marshall Willen review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 75Hz |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4” x 1.5” x 4” (101 x 39 x 101 mm) |
| Drivers | 2” (51mm) full-range with dual passive radiators |
| EQ | Yes |
| IP Rating | IP67 |
| Maximum SPL | 88dB (Manufacturer specified) |
| Omnidirectional | Pointing up |
| Party Mode | Yes (Marshall Stack) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| Weight | 0.7 lbs (309 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Danny Pops: Does it surpass the first Willen? My Marshall Willen II Review More from DannyPops →
- Danny Pops: I WAS BLOWN AWAY - Tribit Stormbox Micro 2 VS Marshall Willen
- Danny Pops: Marshall Willen VS Bose, Sony, and Tribit Micro Speakers
- Storytripper HD: Marshall Willen vs Tribit Stormbox Micro 2 More from storytripperhd →
- Alkar Audio: Speaker Bluetooth Marshall Willen Review VS Tribit Stormbox Micro 2
- MyTechAudio: MARSHALL WILLEN Detail Review Indonesia Vs TRIBIT Micro 1 & Micro 2
- Storytripper HD: Marshall Willen vs Tribit StormBox Micro 2 vs Klipsch Austin
- Head-to-Head Comparisons
- Marshall Willen vs Klipsch Austin
- Marshall Willen vs Anker Soundcore Mini
- Marshall Willen vs B&O Beoplay P2
- Marshall Willen vs Ultimate Ears Miniroll
- Marshall Willen vs Mifa Tango
- Marshall Willen vs Marshall Willen II
- Marshall Willen vs Bose Soundlink Micro 2
- Marshall Willen vs Bose Soundlink Micro
- See all 31 comparisons
Monster Bluetooth Speaker: $19.99 Amazon eBay
Pros: A very light, IPX7-rated mini speaker with USB-C charging, aux and microSD playback, speakerphone support and TWS pairing. It is a convenient rugged travel speaker when water resistance and small size matter more than bass. Measured bass extension of 95Hz (-10dB).
Cons: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs. It cannot deliver the scale, detail or battery endurance of stronger small-speaker rivals, and no app or EQ is available to improve the tuning.
Full Monster Bluetooth Speaker review and specifications →
| Amplifier Power | 5W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 95Hz |
| Battery Life | 6.5 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | Specifications vary by model |
| Drivers | 1.4” (36mm) full-range driver |
| EQ | No |
| IP Rating | IPX7 |
| MicroSD Playback | Yes |
| Omnidirectional | Pointing up |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (carabiner hook, suction cup) |
| TWS | Yes |
| Weight | 0.4 lbs (185 g) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
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