Short answer: the JBL Partybox 330, if you are buying new. The JBL Partybox 310 ranks higher than the Marshall Bromley 450 (#4 vs #26 of 54 party speakers) but is discontinued; its replacement, the JBL Partybox 330, is rated 4.6/5 at $629.95 and is still sold new.
The JBL Partybox 310 is the better-sounding option. A top party speaker with remarkably deep bass and balanced sound, wheels and a handle, now discontinued but worth buying used. The tradeoff: It is very large, at 688 x 326 x 368mm and 37.5 lbs (17 kg), so it is a poor fit for small spaces or carrying far.
The Marshall Bromley 450 is the longer-running, lighter option. A rugged, weather resistant party speaker with drivers on every side, a swappable battery, and mic and guitar inputs. It is rated for 40 hours of battery against 18 for the JBL Partybox 310. At 27.1 lbs (12.3 kg) it weighs noticeably less than the JBL Partybox 310 at 37.5 lbs (17 kg). It supports AAC Bluetooth, which the JBL Partybox 310 lacks. The tradeoff: It is the quietest of its rivals: both the Soundboks Mix and Teufel Rockster Air 2 play louder, and near max volume the bass recedes and the sound gets less composed.
Buy the JBL Partybox 330, the replacement for the discontinued JBL Partybox 310; it is rated higher for sound quality than the Marshall Bromley 450.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| JBL Partybox 310 | Marshall Bromley 450 | |
|---|---|---|
| Price | $579.95 Discontinued | $569.99 |
| Ranked | #4 of 54 in Party Size Portable Bluetooth Speakers | #26 of 54 in Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Bass Extension (-10dB) | 32Hz | - |
| Battery Life | 18 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LC3 |
| Charging Time | 3.5 hours | 3.5 hours |
| EQ | Yes (3 band) | Yes |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | IP55 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (2x XLR/6.35mm combo) |
| Party Mode | No | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Stereo | Partially | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 37.5 lbs (17 kg) | 27.1 lbs (12.3 kg) |
| Amplifier Power | 240W | 400W |
| Drivers | 2x 6.5” (165mm) woofers + 2x 2.5” (65mm) tweeters | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | Yes |
| Wheels | Yes | No |
| Dimensions | 27.1”H x 12.8”W x 14.5”D (687.7 x 325.6 x 367.8 mm) | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) |
| Bluetooth Version | 5.1 | 5.3 |
| Strap | No | No |
| Frequency Response | - | 42Hz - 20kHz (Manufacturer specified) |
| Removable Battery | - | Yes |
| XLR Input | - | Yes (2x combo) |
| Built-in Microphone | - | No |
| Wi-Fi | - | No |
Where the Ratings Come From
- JBL Partybox 310: reviews by DLX Willington, Jay’s Straight Up Reviews & More and KULAS TECH SHOW.
- Marshall Bromley 450: reviews by M1M Tech Channel, Smart Home Sounds and Storytripper HD.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
Related Speaker Comparisons
How JBL Partybox 310 compares with other leading options: