Short answer: the Willen II for balance, the JBL Go 4 for a bit more low end. The Willen II is more balanced than the first Willen with no sharp treble, but its bass is still shallow. The Go 4 adds a little more bass than the Go 3 and fixes the strange mids peak, yet it runs out of composure with bass-heavy tracks pushed past about 50% volume.
Buy the Marshall Willen II. It is rated higher for sound quality, and the $80.04 you would save on the JBL Go 4 does not close the gap.
There is a real battery-life gap here: the Marshall Willen II is rated for 17 hours, the JBL Go 4 only 7 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Willen II | JBL Go 4 | |
|---|---|---|
| Price | $129.99 | $49.95 |
| Ranked | #11 of 50 in Small Size Portable Bluetooth Speakers | #27 of 50 in Small Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 70Hz | ~82Hz |
| Battery Life | 17 hours (Manufacturer specified) | 7 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | No | Yes (Auracast) |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | No | Yes |
| Weight | 0.8 lbs (360 g) | 0.4 lbs (190 g) |
| Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.3 | 5.3 |
| Frequency Response | 75Hz - 20kHz (Manufacturer specified) | 90Hz - 20kHz (Manufacturer specified) |
| Charging Time | 2.5 hours | 3 hours |
| Drivers | 2” (51mm) full-range with dual passive radiators | 45mm |
| Dimensions | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) | 3.7” x 3” x 1.7” (94.3 x 75.7 x 42.2 mm) |
| Amplifier Power | 10W | 4.2W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
Related Speaker Comparisons
More worthwhile head-to-heads for Marshall Willen II:
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Prices on this page were last checked October 3, 2026 at 10:26 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 II: $129.99 Amazon eBay
Older model: the Marshall Willen (ranked lower, rated 3.8/5).
Pros: More balanced than the first Willen, no sharp treble. Measured bass extension of 70Hz (-10dB).
Cons: Not that deep of bass. Fairly low max output vs pricier speakers; midrange can sound a bit congested at volume. No aux input.
Full Marshall Willen II review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 70Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Charging Time | 2.5 hours |
| Digital Aux Input | No |
| Dimensions | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) |
| Drivers | 2” (51mm) full-range with dual passive radiators |
| EQ | Yes |
| Frequency Response | 75Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | Pointing up |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| Weight | 0.8 lbs (360 g) |
- Links
- Reviews, Comparisons and Sound Samples
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JBL Go 4: $49.95 Amazon B&H Photo Video eBay
Newer model: the JBL Go 5, ranked higher, rated 3.2/5.
Pros: A little more bass than the Go 3 and they fixed the strange mids peak. Measured bass extension of ~82Hz (-10dB).
Cons: Not much bass at all, especially with electronic/bass-heavy tracks pushed past ~50% volume. Midrange can sound grainy and treble a bit sizzly; loses clarity at higher volumes.
Full JBL Go 4 review and specifications →
| Amplifier Power | 4.2W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | ~82Hz |
| Battery Life | 7 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Charging Time | 3 hours |
| Digital Aux Input | No |
| Dimensions | 3.7” x 3” x 1.7” (94.3 x 75.7 x 42.2 mm) |
| Drivers | 45mm |
| EQ | Yes |
| Frequency Response | 90Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | Pointing up |
| Party Mode | Yes (Auracast) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.4 lbs (190 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Stereo Specs: JBL GO 4 vs JBL GO 3 : Is there more bass or not?Unboxing,Features,Specs,Sound Test & Comparison !
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