Short answer: the JBL Go 4 for better sound quality, the Monster Bluetooth Speaker for the lower price. The JBL Go 4 ranks #30 of 62 small speakers, rated 3.2/5, at $42.99. The Monster Bluetooth Speaker ranks #39, rated 3.0/5, at $19.99, $23 cheaper.
The JBL Go 4 is the deeper-bass choice. A pocket sized waterproof mini speaker with a loop for hanging and app EQ. Its bass reaches about 82Hz before falling 10dB, against 95Hz for the Monster Bluetooth Speaker. It links with other speakers (Auracast), which the Monster Bluetooth Speaker cannot. It has an adjustable EQ, which the Monster Bluetooth Speaker lacks. Watch for: Not much bass at all, especially with electronic/bass-heavy tracks pushed past ~50% volume.
Why pick the Monster Bluetooth Speaker: A very cheap, light waterproof travel speaker with USB-C charging, aux and microSD playback, and stereo pairing. It keeps a wired aux input, which the JBL Go 4 lacks. The catch: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs.
Buy the JBL Go 4 if sound quality is the priority over the price, or the Monster Bluetooth Speaker if the price is the priority over sound quality.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A pocket sized waterproof mini speaker with a loop for hanging and app EQ.
A very cheap, light waterproof travel speaker with USB-C charging, aux and microSD playback, and stereo pairing.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| JBL Go 4 | Monster Bluetooth Speaker | |
|---|---|---|
| Price | $42.99 | $19.99 |
| Ranked | #30 of 62 in Small Size Portable Bluetooth Speakers | #39 of 62 in Small Size Portable Bluetooth Speakers |
| App | Yes | No |
| Bass Extension (-10dB) | ~82Hz | 95Hz |
| Battery Life | 7 hours (Manufacturer specified) | 6.5 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Auracast) | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | Yes | Yes |
| Weight | 0.4 lbs (190 g) | 0.4 lbs (185 g) |
| Aux Input | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Bluetooth Version | 5.3 | 5.4 |
| Frequency Response | 90Hz - 20kHz (Manufacturer specified) | - |
| Dimensions | 3.7” x 3” x 1.7” (94.3 x 75.7 x 42.2 mm) | Specifications vary by model |
| Charging Time | 3 hours | - |
| Drivers | 45mm | 1.4” (36mm) full-range driver |
| Amplifier Power | 4.2W | 5W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | Yes (carabiner hook, suction cup) |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
How JBL Go 4 compares with other leading options: