Short answer: the Marshall Bromley 450. It ranks #26 of 53 party speakers by sound quality, rated 3.7/5, at $569.99; the Soundboks Mix ranks #36, rated 3.2/5, and costs $799, which makes this an easy call rather than a real tradeoff.
In M1M Tech Channel’s side by side test the Marshall Bromley 450 had the fuller bass foundation and reached deeper into the low bass, and its wide dispersion made music sound more open and airy. RTINGS agreed that the Marshall stays balanced from any angle, while the Soundboks Mix sounds closed-off when you listen from the sides.
The Soundboks Mix plays louder, with more headroom when you push it, and its app is far more complete, with a graphic EQ and stereo pairing. The Marshall relies on physical bass and treble knobs.
RTINGS measured the longer battery life on the Marshall, at 18.8 hours. Both are built for parties, with IP ratings for outdoor use and inputs for microphones.
Buy the Marshall Bromley 450. It is rated higher for sound quality than the Soundboks Mix and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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
| Marshall Bromley 450 | Soundboks Mix | |
|---|---|---|
| Price | $569.99 | $799 |
| Ranked | #26 of 53 in Party Size Portable Bluetooth Speakers | #36 of 53 in Party Size Portable Bluetooth Speakers |
| Amplifier Power | 400W | 72W |
| Drivers | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators | 10” woofer, 1.2” tweeter |
| Frequency Response | 42Hz - 20kHz (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| Battery Life | 40+ hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Charging Time | 3.5 hours | - |
| Removable Battery | Yes | Yes |
| IP Rating | IP55 | IP65 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 4.2 |
| Bluetooth Codecs | SBC, AAC, LC3 | SBC (additional codecs unverified) |
| Aux Input | Yes (3.5mm, RCA) | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| Microphone Input | Yes (2x XLR/6.35mm combo) | - |
| XLR Input | Yes (2x combo) | - |
| Guitar Input | Yes | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| App | Yes (Marshall Bluetooth app) | No |
| EQ | Yes | No |
| Party Mode | Yes (Auracast) | Yes (TeamUp, up to 5 speakers) |
| Built-in Microphone | No | - |
| USB Playback | No | No |
| Wi-Fi | No | - |
| TWS | No | No |
| Lights | Yes | - |
| Weight | 27.1 lbs (12.3 kg) | 21.4 lbs (9.7 kg) |
| Dimensions | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) | 19.1” x 13.5” x 10.9” (484 x 342 x 276 mm) |
| Stereo | Yes | No |
| Omnidirectional | Yes | No |
| Strap | No | - |
| Wheels | No | - |
| Maximum SPL | - | 121dB (Manufacturer specified) |
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