These are not really the same size class, and that is the honest framing here. The Sony ULT Tower 7 ranks #1 of 53 party speakers by sound quality at $648; the JBL Partybox On the Go ranks #67 of 113 boombox speakers by sound quality at $329.95.
The Sony ULT Tower 7 is the longer-running option. A big, loud party speaker on wheels with punchy bass, a 30 hour battery, 360 degree sound and inputs for mics and instruments. It is rated for 30 hours of battery against 6 for the JBL Partybox On the Go. It supports LDAC Bluetooth, which the JBL Partybox On the Go lacks. It links with other speakers (Auracast), which the JBL Partybox On the Go cannot. The tradeoff: The reviewer notes that Auracast pairing is not backward-compatible with Sony’s older Party Connect speakers, and the hard-plastic corners lack protective rubber bumpers.
The JBL Partybox On the Go is the lighter option. A battery party speaker with an included wireless microphone and a detachable shoulder strap. At 16.5 lbs (7.5 kg) it weighs much less than the Sony ULT Tower 7 at 50.3 lbs (22.8 kg). The catch: Battery life is short, and its sound trails the rest of the Partybox line.
Buy the Sony ULT Tower 7 at $648 for a party speaker, or the JBL Partybox On the Go at $329.95 for a boombox speaker instead.
Looking for alternatives? See the complete 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 Partybox On the Go | |
|---|---|---|
| Price | $648.00 | $329.95 |
| Ranked | #1 of 53 in Party Size Portable Bluetooth Speakers | #67 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Sony Sound Connect) | Yes (JBL PartyBox app) |
| Aux Input | RCA input | Yes |
| Battery Life | 30 hours (lights off; manufacturer specified) | 6 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 4.2 |
| 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) | 19.3” x 8.8” x 9.6” (489 x 224 x 244.5 mm) |
| Drivers | 7 drivers: 1x woofer, 2x midrange, 2x front tweeter, 2x rear tweeter | 5.1” woofer + tweeters |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat) | No |
| Guitar Input | No | - |
| IP Rating | IPX4 | IPX4 |
| Microphone Input | Yes | - |
| Omnidirectional | Yes (360 degree Party Sound) | No |
| Amplifier Power | 420W | 100W |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes (USB charging) | Yes (USB-A, 5V/2.1A) |
| Power Input | AC power cord | USB-C |
| Removable Battery | No | - |
| Stereo | Yes | Partially |
| TWS | Yes (Stereo Pair) | Yes |
| USB Playback | Yes (USB-A) | Yes |
| Weight | 50.3 lbs (22.8 kg) | 16.5 lbs (7.5 kg) |
| Wi-Fi | No | - |
| Lights | Yes | - |
| Wheels | Yes | - |
| Strap | No | Yes (detachable shoulder strap) |
| Bass Extension (-10dB) | - | 49Hz |
| Maximum SPL | - | 94dB (Manufacturer specified) |
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