These sit in different size classes, so this is not a straight ranking comparison. The Sony ULT Tower 7 ranks #1 of 53 party speakers by sound quality at $648; the JBL Boombox 3 ranks #27 of 113 boombox speakers by sound quality at $349.95.
Different sizes. The ULT Tower 7 is a 50.3 lbs (22.8 kg) party speaker on wheels with 420W and 360-degree sound. The Boombox 3 is a 14.8 lbs (6.7 kg) boombox with a handle. Each is rated within its own class.
The ULT Tower 7 is the party machine. Its ULT1 bass is punchy and clean, it claims 30 hours with the lights off, and it has balanced XLR, RCA and mic inputs, LDAC and a 10-band EQ.
The Boombox 3 is the one to take to the beach. It is IP67 against the Tower 7’s IPX4, measured about 110dB, and claims 24 hours with a USB-A power bank. It is bass boosted with a mid bass dip, and has no EQ.
Buy the Sony ULT Tower 7 ($648) for a party speaker; the JBL Boombox 3 ($349.95) suits a boombox speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
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.
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Specifications Side By Side
| Sony ULT Tower 7 | JBL Boombox 3 | |
|---|---|---|
| Price | $648.00 | $349.95 |
| Ranked | #1 of 53 in Party Size Portable Bluetooth Speakers | #27 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Sony Sound Connect) | No |
| Aux Input | RCA input | Yes |
| Battery Life | 30 hours (lights off; manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 5.3 |
| Built-in Microphone | No | No |
| Digital Aux Input | Yes (USB-C) | No |
| Dimensions | 13.7” x 16.6” x 28” (348 x 422 x 711 mm) | 19” x 10.1” x 7.9” (482 x 257 x 200 mm) |
| Drivers | 7 drivers: 1x woofer, 2x midrange, 2x front tweeter, 2x rear tweeter | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat) | No |
| Guitar Input | No | - |
| IP Rating | IPX4 | IP67 |
| Microphone Input | Yes | No |
| Omnidirectional | Yes (360 degree Party Sound) | No |
| Amplifier Power | 420W | 180W AC / 136W battery |
| Party Mode | Yes (Auracast) | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB charging) | Yes (USB-A) |
| Power Input | AC power cord | AC Power cable |
| Removable Battery | No | - |
| Stereo | Yes | Yes |
| TWS | Yes (Stereo Pair) | Yes |
| USB Playback | Yes (USB-A) | No |
| Weight | 50.3 lbs (22.8 kg) | 14.8 lbs (6.7 kg) |
| Wi-Fi | No | - |
| Lights | Yes | - |
| Wheels | Yes | - |
| Strap | No | No |
| Aux Latency | - | 25ms |
| Bass Extension (-10dB) | - | 43Hz |
| Bluetooth Latency | - | 100ms |
| Maximum SPL | - | 110dB (measured by Alan Ross Reviews) |
| FM Tuner | - | No |
| MicroSD Playback | - | No |
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