Short answer: the Sony SRS-XV900 for raw loudness, the JBL Partybox 310 for bass. The Sony can get slightly louder than the 310 and also has a convenient handle and wheels, but its bass is not as deep and it loses more bass at high volume than the 310 and every other speaker on the page. The 310 has the deepest bass of any battery powered speaker and the most balanced sound in its class, though it is very large.
Worth knowing: the JBL Partybox 310 is discontinued, though it still ranks #4 of 53 party speakers by sound quality, so a used unit beats most of what is still sold new. The JBL Partybox 310’s replacement, the JBL Partybox 330, is rated 4.6/5 at $629.95.
Buy the JBL Partybox 310 at $579.95 for a party speaker, or the Sony SRS-XV900 at $900 for a large party speaker instead.
There is a real gap in water resistance: the JBL Partybox 310 at IPX4 (splashing) against the Sony SRS-XV900, which has no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| JBL Partybox 310 | Sony SRS-XV900 | |
|---|---|---|
| Price | $579.95 Discontinued | $900 Discontinued |
| Ranked | #4 of 53 in Party Size Portable Bluetooth Speakers | #12 of 13 in Large Party Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 32Hz | - |
| Battery Life | 18 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Charging Time | 3.5 hours | - |
| EQ | Yes (3 band) | Yes |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (Karaoke mode with echo effect) |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power cord |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 37.5 lbs (17 kg) | 58.6 lbs (26.6 kg) |
| Amplifier Power | 240W | 100W |
| Drivers | 2x 6.5” (165mm) woofers + 2x 2.5” (65mm) tweeters | 9 drivers: 1x 12.6”x12.6” woofer, 2x 4.7” midrange, 2x 2” front tweeter, 2x 1.6” side tweeter, 2x 1.6” rear tweeter |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Wheels | Yes | Yes |
| Dimensions | 27.1”H x 12.8”W x 14.5”D (687.7 x 325.6 x 367.8 mm) | 16.1” x 34.6” x 17.3” (410 x 880 x 439 mm) |
| Bluetooth Version | 5.1 | 5.2 |
| Strap | No | No |
| Inputs | - | Optical |
| Removable Battery | - | No |
| Built-in Microphone | - | No |
| Wi-Fi | - | No |
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