These are not really the same size class, and that is the honest framing here. The Bogasing G4 ranks #27 of 179 medium speakers by sound quality at $42.49; the Monster Bluetooth Speaker ranks #39 of 62 small speakers by sound quality at $19.99.
The Bogasing G4 is the deeper-bass, longer-running pick. A light, affordable waterproof speaker with surprisingly strong bass for its size, solid loudness, long battery life and stereo pairing. Its bass reaches about 56Hz before falling 10dB, against 95Hz for the Monster Bluetooth Speaker. It is rated for 24 hours of battery against 6.5 for the Monster Bluetooth Speaker. It plays in stereo from a single unit, unlike the Monster Bluetooth Speaker. The tradeoff: The upper treble is boosted and uneven, while the mids sit slightly behind the bass and highs, so it is not a neutral choice for vocal-focused music.
The Monster Bluetooth Speaker is the lighter option. A very cheap, light waterproof travel speaker with USB-C charging, aux and microSD playback, and stereo pairing. At 0.4 lbs (185 g) it weighs much less than the Bogasing G4 at 1.8 lbs (830 g). The tradeoff: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs.
Buy the Bogasing G4 at $42.49 if you want a medium speaker. Buy the Monster Bluetooth Speaker at $19.99 if you want a small speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Bogasing G4 | Monster Bluetooth Speaker | |
|---|---|---|
| Price | $42.49 | $19.99 |
| Ranked | #27 of 179 in Medium Size Portable Bluetooth Speakers | #39 of 62 in Small Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Aux Latency | 16ms | - |
| Bass Extension (-10dB) | 56Hz | 95Hz |
| Battery Life | 24 hours (Manufacturer specified) | 6.5 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | IPX7 | IPX7 |
| Bluetooth Latency | 90ms | - |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | Yes |
| Party Mode | No | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| Weight | 1.8 lbs (0.83 kg) | 0.4 lbs (185 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | LE Audio with LC3 | SBC |
| Amplifier Power | 50W | 5W |
| Drivers | Two drivers and passive radiators | 1.4” (36mm) full-range driver |
| Bluetooth Version | 5.3 | 5.4 |
| Digital Aux Input | No | No |
| Dimensions | 8.9”H x 2.5”W x 3.4”D (225 x 64 x 86 mm) | Specifications vary by model |
| Power Bank | - | No |
| Built-in Microphone | - | Yes |
| Strap | - | Yes (carabiner hook, suction cup) |
Related Speaker Comparisons
More top alternatives to Bogasing G4: