Short answer: the JBL Partybox Stage 320. It ranks #3 of 53 party speakers by sound quality, rated 4.6/5, at $569.95; the Marshall Bromley 450 ranks #26, rated 3.7/5, and costs $569.99, so there is not much of a tradeoff to weigh.
The JBL Partybox Stage 320 is built for parties first: it is bigger, rolls on wheels with a telescopic handle and has a big light show. In a listening comparison it brought more bass, though that bass could start to dominate the mix.
The Marshall Bromley 450 is the more balanced and composed of the two, and it is just as enjoyable at low volume in the background. Its drivers on every side keep the sound consistent around the room, and its styling fits in at home.
The Stage 320 is the better rated speaker, with more output and an app with custom EQ. The Marshall uses physical bass and treble knobs and a swappable battery with a claimed 40+ hours.
Buy the JBL Partybox Stage 320. It is rated higher for sound quality than the Marshall Bromley 450 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
There is a real battery-life gap here: the Marshall Bromley 450 is rated for 40 hours, the JBL Partybox Stage 320 only 18 hours.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| JBL Partybox Stage 320 | Marshall Bromley 450 | |
|---|---|---|
| Price | $569.95 | $569.99 |
| Ranked | #3 of 53 in Party Size Portable Bluetooth Speakers | #26 of 53 in Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Battery Life | 18 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LC3 |
| Bluetooth Version | 5.4 | 5.3 |
| Drivers | 2x 6.5” woofers, 2x 25mm tweeters | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators |
| EQ | Yes (5 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 | Yes (Auracast) | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | Yes |
| Stereo | Partially | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 36.4 lbs (16.5 kg) | 27.1 lbs (12.3 kg) |
| Amplifier Power | 240W | 400W |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | Yes |
| Wheels | Yes | No |
| Dimensions | 26.3”H x 13.2”W x 15.2”D (669 x 335 x 385 mm) | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) |
| Strap | No | No |
| Frequency Response | - | 42Hz - 20kHz (Manufacturer specified) |
| Charging Time | - | 3.5 hours |
| XLR Input | - | Yes (2x combo) |
| Built-in Microphone | - | No |
| Wi-Fi | - | No |
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