Short answer: the JBL PartyBox 520 is the more manageable high-output party speaker, while the Sony ULT Tower 10 is for shoppers who want maximum tower-speaker scale. JBL is 8 of 13 versus 11 of 13 for Sony.
The PartyBox 520 includes a handle and wheels, making its considerable size easier to manage, although it remains a large and heavy system. The ULT Tower 10 can play louder than JBL’s PartyBox Ultimate, but it does not reach as deep in the bass and sheds bass noticeably as volume rises.
Buy the JBL PartyBox 520 if you want a high-output party speaker that is still designed to be moved around.
Buy the Sony ULT Tower 10 if absolute loudness and a large tower format outweigh bass consistency at high volume.
If water resistance matters to you, the JBL Partybox 520 at IPX4 (splashing) holds up far better than the Sony ULT Tower 10 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| JBL Partybox 520 | Sony ULT Tower 10 | |
|---|---|---|
| Price | $879.95 | $994.34 |
| Ranked | #8 of 13 in Large Party Size Portable Bluetooth Speakers | #11 of 13 in Large Party Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | No Battery |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| EQ | Yes (5 band) | Yes (7 band) |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (Karaoke mode with echo effect) |
| Party Mode | Yes (Auracast) | Yes (Auracast up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 56.2 lbs (25.5 kg) | 63.9 lbs (29 kg) |
| Built-in Microphone | No | No |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Wi-Fi | No | No |
| Bluetooth Version | 5.4 | 5.2 |
| Dimensions | 16.3” x 30.3” x 14.5” (415 x 769 x 369 mm) | 16.5” x 43.5” x 16.9” (418 x 1106 x 428 mm) |
| Drivers | 2x 7.5” woofer, 2x 1” dome tweeter | 7 drivers: 1x 12.6”x12.6” woofer, 2x 3.1” midrange, 2x 1.6” tweeter, 2x 1.6” rear tweeter |
| Amplifier Power | 400W | 139W |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Wheels | Yes | - |
| Strap | No | No |
| Wireless Microphones | - | Yes Included |
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