Short answer: the Sony ULT Tower 7. It ranks #1 of 44 party speakers by sound quality (rated 4.7/5) at $648 and is still sold new; the JBL Partybox 300 ranks #10 (rated 4.3/5) and is discontinued, so it is only an option used.
The Sony ULT Tower 7 is the better-sounding, longer-running option. A compelling large-party value at $648: 420W output, an IPX4-rated 30-hour battery, 360-degree sound, wheels and four carry handles at 50.3 lbs (22.8 kg). It is rated for 30 hours of battery against 18 for the JBL Partybox 300. It is rated IPX4, while the JBL Partybox 300 has no water resistance. It supports LDAC Bluetooth, which the JBL Partybox 300 lacks. 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 300 is the lighter pick. Exceptional sound quality with crisp, crystal clear highs and midranges, hard punchy bass without muddiness. At 35.3 lbs (16 kg) it weighs noticeably less than the Sony ULT Tower 7 at 50.3 lbs (22.8 kg). The catch: Hard to carry, too tall, drags on the ground.
Buy the Sony ULT Tower 7. It is rated higher for sound quality and still sold new, while the JBL Partybox 300 is discontinued.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Tower 7 | JBL Partybox 300 | |
|---|---|---|
| Price | $648.00 | $300 Discontinued |
| Ranked | #1 of 44 in Party Size Portable Bluetooth Speakers | #10 of 44 in Party Size Portable Bluetooth Speakers |
| App | Yes (Sony Sound Connect) | No |
| Aux Input | RCA input | Yes |
| Battery Life | 30 hours (lights off; manufacturer specified) | 18 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 4.2 |
| Built-in Microphone | No | - |
| Digital Aux Input | Yes (USB-C) | No |
| Dimensions | 13.7” x 16.6” x 28” (348 x 422 x 711 mm) | 27” x 13” x 12.7” (685.8 x 330.2 x 322.6 mm) |
| Drivers | 7 drivers: 1x woofer, 2x midrange, 2x front tweeter, 2x rear tweeter | 2x 6.5” (165mm) woofers + 3x 2.25” (57mm) tweeters |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat) | No |
| Guitar Input | No | Yes |
| IP Rating | IPX4 | None |
| Microphone Input | Yes | Yes (Karaoke mode with echo effect) |
| Omnidirectional | Yes (360 degree Party Sound) | No |
| Amplifier Power | 420W | 120W |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes (USB charging) | Yes (USB-A) |
| Power Input | AC power cord | AC Power cord |
| Removable Battery | No | - |
| Stereo | Yes | Yes (lying down) |
| TWS | Yes (Stereo Pair) | Yes |
| USB Playback | Yes (USB-A) | Yes |
| Weight | 50.3 lbs (22.8 kg) | 35.3 lbs (16 kg) |
| Wi-Fi | No | - |
| Lights | Yes | Yes |
| Wheels | Yes | - |
| Strap | No | No |
| Bass Extension (-10dB) | - | 40Hz |
| Frequency Response | - | 45Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
More worthwhile head-to-heads for Sony ULT Tower 7:
- Sony ULT Tower 7 vs JBL Partybox 330
- Sony ULT Tower 7 vs JBL Partybox Stage 320
- Sony ULT Tower 7 vs JBL Partybox 310
- Sony ULT Tower 5 vs Sony ULT Tower 7
- JBL Partybox Club 120 vs Sony ULT Tower 7
Prices on this page were last checked October 4, 2026 at 9:58 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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The Two Speakers In Full
Sony ULT Tower 7: $648.00 Amazon eBay
Pros: A compelling large-party value at $648: 420W output, an IPX4-rated 30-hour battery, 360-degree sound, wheels and four carry handles at 22.8kg. The full review praises its punchy, clean ULT1 bass, ULT2’s higher-output mode, simplified controls and unusually complete I/O: USB-C, USB-A, RCA, balanced XLR and mic input.
Cons: 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. IPX4 is splash resistance rather than full weatherproofing; the 30-hour claim requires lights off.
Full Sony ULT Tower 7 review and specifications →
| Amplifier Power | 420W |
|---|---|
| App | Yes (Sony Sound Connect) |
| Aux Input | RCA input |
| Battery Life | 30 hours (lights off; manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 13.7” x 16.6” x 28” (348 x 422 x 711 mm) |
| Drivers | 7 drivers: 1x woofer, 2x midrange, 2x front tweeter, 2x rear tweeter |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat) |
| Guitar Input | No |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes |
| Omnidirectional | Yes (360 degree Party Sound) |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB charging) |
| Power Input | AC power cord |
| Removable Battery | No |
| Stereo | Yes |
| Strap | No |
| TWS | Yes (Stereo Pair) |
| USB Playback | Yes (USB-A) |
| Weight | 50.3 lbs (22.8 kg) |
| Wheels | Yes |
| Wi-Fi | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Tower 7 vs JBL Partybox 330
- Sony ULT Tower 7 vs JBL Partybox Stage 320
- Sony ULT Tower 7 vs JBL Partybox 310
- Sony ULT Tower 7 vs Sony ULT Tower 5
- Sony ULT Tower 7 vs JBL Partybox Club 120
- Sony ULT Tower 7 vs JBL Partybox 130
- Sony ULT Tower 7 vs JBL Partybox 100
- Sony ULT Tower 7 vs JBL Partybox 110
- See all 62 comparisons
JBL Partybox 300: $300 Discontinued eBay
Newer model: the JBL Partybox 330, ranked higher, rated 4.6/5.
Pros: Exceptional sound quality with crisp, crystal clear highs and midranges, hard punchy bass without muddiness. 2x 6.5” woofers + 3x 2.25” tweeters, bass boost function, 45Hz-20kHz frequency range. 18-hour battery with 10400mAh capacity. Multiple inputs (RCA, USB, 3.5mm aux, mic, guitar). LED light modes (meter/pulse/party). True Wireless Stereo pairing up to 2 units. Measured bass extension of 40Hz (-10dB).
Cons: Hard to carry, too tall, drags on the ground. Max spl and bass extension are only as good as the Partybox 100. No real reason to ever get one, get a Partybox 100 instead. Discontinued.
Full JBL Partybox 300 review and specifications →
| Amplifier Power | 120W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 40Hz |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Digital Aux Input | No |
| Dimensions | 27” x 13” x 12.7” (685.8 x 330.2 x 322.6 mm) |
| Drivers | 2x 6.5” (165mm) woofers + 3x 2.25” (57mm) tweeters |
| EQ | No |
| Frequency Response | 45Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | None |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power cord |
| Stereo | Yes (lying down) |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 35.3 lbs (16 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
- JBL Partybox 300 vs JBL Partybox 110
- JBL Partybox 300 vs Onn XL Wireless Party Speaker
- JBL Partybox 300 vs JBL Partybox 100
- JBL Partybox 300 vs Zealot PT21
- JBL Partybox 300 vs JBL Partybox 130
- JBL Partybox 300 vs JBL Partybox Club 120
- JBL Partybox 300 vs Sony SRS-XP700
- JBL Partybox 300 vs Sony SRS-XP500
- See all 45 comparisons