These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox 520 ranks #8 of 13 large party speakers by sound quality at $879.95; the JBL Partybox 300 ranks #10 of 44 party speakers by sound quality at $300.
The JBL Partybox 520 is the tougher choice. JBL’s biggest battery-powered PartyBox after the 720 combines very high output, deep chesty bass, wheels and a telescoping handle with a capable app EQ, lights, USB-C audio and mic/instrument inputs. It is rated IPX4, while the JBL Partybox 300 has no water resistance. It links with other speakers (Auracast), which the JBL Partybox 300 cannot. It has an adjustable EQ, which the JBL Partybox 300 lacks. Watch for: It is very large and heavy, Bluetooth latency is high for video, and its front-facing design loses much of the mids and treble to people off to the sides.
The JBL Partybox 300 is the lighter choice. 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 JBL Partybox 520 at 56.2 lbs (25.5 kg). Watch for: Hard to carry, too tall, drags on the ground.
One note: the JBL Partybox 300 is discontinued, but it still ranks #10 of 44 party speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the JBL Partybox 520 at $879.95 for a large party speaker, or the JBL Partybox 300 at $300 for a party speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox 520 | JBL Partybox 300 | |
|---|---|---|
| Price | $879.95 | $300 Discontinued |
| Ranked | #8 of 13 in Large Party Size Portable Bluetooth Speakers | #10 of 44 in Party Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (5 band) | No |
| 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) | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 56.2 lbs (25.5 kg) | 35.3 lbs (16 kg) |
| Built-in Microphone | No | - |
| Stereo | Yes | Yes (lying down) |
| Omnidirectional | No | No |
| Wi-Fi | No | - |
| Bluetooth Version | 5.4 | 4.2 |
| Dimensions | 16.3” x 30.3” x 14.5” (415 x 769 x 369 mm) | 27” x 13” x 12.7” (685.8 x 330.2 x 322.6 mm) |
| Drivers | 2x 7.5” woofer, 2x 1” dome tweeter | 2x 6.5” (165mm) woofers + 3x 2.25” (57mm) tweeters |
| Amplifier Power | 400W | 120W |
| Digital Aux Input | No | 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 JBL Partybox 300:
- Sony ULT Tower 7 vs JBL Partybox 300
- JBL Partybox 330 vs JBL Partybox 300
- JBL Partybox Stage 320 vs JBL Partybox 300
- JBL Partybox 310 vs JBL Partybox 300
- Sony ULT Tower 5 vs JBL Partybox 300
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
JBL Partybox 520: $879.95 Amazon B&H Photo Video eBay
Pros: JBL’s biggest battery-powered PartyBox after the 720 combines very high output, deep chesty bass, wheels and a telescoping handle with a capable app EQ, lights, USB-C audio and mic/instrument inputs. RTINGS finds it loud enough for backyards and unusually well-equipped for a battery party speaker.
Cons: It is very large and heavy, Bluetooth latency is high for video, and its front-facing design loses much of the mids and treble to people off to the sides. The bass-heavy default can also make dialogue less clear without EQ.
Full JBL Partybox 520 review and specifications →
| Amplifier Power | 400W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.3” x 30.3” x 14.5” (415 x 769 x 369 mm) |
| Drivers | 2x 7.5” woofer, 2x 1” dome tweeter |
| EQ | Yes (5 band) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 56.2 lbs (25.5 kg) |
| Wheels | Yes |
| Wi-Fi | No |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: JBL Partybox 520 & 720 - indoor listening session More from Oluv’Sone →
- Oluv Patreon: JBL Partybox 520 vs 720 - outdoor test
- Oluv Patreon: JBL Partybox 320 vs 520 - indoor listening session
- Oluv Patreon: JBL Partybox 320 vs 520 - outdoor test
- Oluv Patreon: JBL Partybox 520 vs Teufel Rockster Neo
- Oluv Patreon: W-King T12 vs JBL Partybox 520
- AudioTribe: JBL PartyBox 520 Loudness & BASS Test Will Shock You!
- GYMCADDY: JBL Partybox 720 Vs JBL Partybox 520 More from GYMCADDY →
- AudioTribe: JBL Partybox 720 vs JBL Partybox 520 Who’s Better?
- M1MTechChannel: Welche JBL Partybox ist die BESTE ? Alle Partyboxen im Vergleich | 2026 More from M1MTechChannel →
- Head-to-Head Comparisons
- JBL Partybox 520 vs Teufel Rockster
- JBL Partybox 520 vs JBL Partybox Ultimate 2
- JBL Partybox 520 vs JBL Partybox 710
- JBL Partybox 520 vs Sony ULT Tower 9
- JBL Partybox 520 vs JBL Partybox 720
- JBL Partybox 520 vs Sony ULT Tower 10
- JBL Partybox 520 vs Sony SRS-XV900
- JBL Partybox 520 vs Teufel Rockster 2
- See all 21 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
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