Short answer: the Marshall Bromley 450. It ranks #24 of 44 party speakers by sound quality (rated 3.7/5) at $649.95 and is still sold new; the Soundboks Go ranks #30 (rated 3.1/5) and is discontinued, so it is only an option used.
The Marshall Bromley 450 is the better-sounding, tougher option. A balanced, warm sound with a flat midrange that keeps vocals and instruments clear, plenty of bass rumble and enough treble for energetic vocals, per RTINGS’ lab tests. It is rated IP55, while the Soundboks Go has no water resistance. It supports AAC Bluetooth, which the Soundboks Go lacks. It has an adjustable EQ, which the Soundboks Go lacks. The catch: 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.
The Soundboks Go is the lighter pick. Exceptional 40-hour battery life at mid-volume (10 hours at full volume), swappable design (second battery $200 available). At 19.8 lbs (9 kg) it weighs noticeably less than the Marshall Bromley 450 at 27.1 lbs (12.3 kg). The tradeoff: Not as loud as the other Soundboks.
Buy the Marshall Bromley 450. It is rated higher for sound quality, and the Soundboks Go is discontinued, so it is only available used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Marshall Bromley 450 | Soundboks Go | |
|---|---|---|
| Price | $649.95 | $799 Discontinued |
| Ranked | #24 of 44 in Party Size Portable Bluetooth Speakers | #30 of 44 in Party Size Portable Bluetooth Speakers |
| Amplifier Power | 400W | 2 x 72W |
| Drivers | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators | 10” woofer, 1” 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 | None |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Bluetooth Codecs | SBC, AAC, LC3 | SBC |
| 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 | AC Power cord |
| 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) | 19.8 lbs (9 kg) |
| Dimensions | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) | 18” x 12” x 10” (457.2 x 304.8 x 254 mm) |
| Stereo | Yes | Yes |
| Omnidirectional | Yes | No |
| Strap | No | - |
| Wheels | No | - |
| Bass Extension (-10dB) | - | 55Hz |
| Maximum SPL | - | 121dB (Manufacturer specified) |
Related Speaker Comparisons
How Marshall Bromley 450 compares with other leading options:
- Sony ULT Tower 7 vs Marshall Bromley 450
- JBL Partybox 330 vs Marshall Bromley 450
- JBL Partybox Stage 320 vs Marshall Bromley 450
- JBL Partybox 310 vs Marshall Bromley 450
- Sony ULT Tower 5 vs Marshall Bromley 450
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
Marshall Bromley 450: $649.95 Amazon B&H Photo Video eBay
Pros: A balanced, warm sound with a flat midrange that keeps vocals and instruments clear, plenty of bass rumble and enough treble for energetic vocals, per RTINGS’ lab tests. Drivers on all four sides keep the tonal balance nearly the same from any angle, and M1M Tech Channel found it more open and airy than the Soundboks Mix and Teufel Rockster Air 2, with deeper bass than both. RTINGS measured 18.8 hours of battery from a swappable LiFePO4 pack shared with the Bromley 750, and it adds IP55 protection, two XLR/6.35mm combo inputs, USB-C audio, Auracast and physical bass and treble knobs.
Cons: 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. The warm tuning lacks some fine treble detail. There is no graphic EQ, only bass and treble knobs, and its stereo spreads left and right channels around the cabinet, so panned elements can land on the wrong side. At 12.3 kg it has a carry handle but no wheels.
Full Marshall Bromley 450 review and specifications →
| Amplifier Power | 400W |
|---|---|
| App | Yes (Marshall Bluetooth app) |
| Aux Input | Yes (3.5mm, RCA) |
| Battery Life | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Charging Time | 3.5 hours |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 14.4” x 19.4” x 10.3” (366 x 492 x 261 mm) |
| Drivers | 2x 6.5” woofers, 4x 2” full-range drivers, 2 passive radiators |
| EQ | Yes |
| Frequency Response | 42Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | IP55 |
| Lights | Yes |
| Microphone Input | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | Yes |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Removable Battery | Yes |
| Stereo | Yes |
| Strap | No |
| TWS | No |
| USB Playback | No |
| Weight | 27.1 lbs (12.3 kg) |
| Wheels | No |
| Wi-Fi | No |
| XLR Input | Yes (2x combo) |
- Links
- Reviews, Comparisons and Sound Samples
- RTINGS: Marshall Bromley 450 Review More from Rtings.com →
- M1M Tech Channel: The best in its class? Marshall Bromley 450 vs. Soundboks & Teufel More from M1MTechChannel →
- HeadphoneCheck: Marshall Bromley 450 test
- Tom’s Guide: Marshall Bromley 450 vs Bromley 750 face-off
- Smart Home Sounds: Marshall Bromley 450 review More from Smart Home Sounds →
- Storytripper HD: JBL Partybox 120 vs Marshall Bromley 450 (Indoor) More from storytripperhd →
- Storytripper HD: Marshall Bromley 450 vs Marshall Bromley 750 (outdoor)
- Storytripper HD: Marshall Woburn III vs Marshall Bromley 450
- Head-to-Head Comparisons
- Marshall Bromley 450 vs Klipsch Gig XXL
- Marshall Bromley 450 vs Samsung MX-ST50B
- Marshall Bromley 450 vs Soundboks Rider
- Marshall Bromley 450 vs W-King T12
- Marshall Bromley 450 vs Soundboks Mix
- Marshall Bromley 450 vs Tronsmart Halo 300
- Marshall Bromley 450 vs Onn Large Party gen 2
- Marshall Bromley 450 vs Sony SRS-XV500
- See all 28 comparisons
Soundboks Go: $799 Discontinued eBay
Newer model: the Soundboks Mix, ranked higher, rated 3.2/5.
Pros: Exceptional 40-hour battery life at mid-volume (10 hours at full volume), swappable design (second battery $200 available). 7.8Ah Li-ion with external charging option and pass-through charging capability. 121dB max volume (Bass+ mode). Premium audio quality, durable ABS polycarbonate with rubberized bumpers. Portable enough for vehicle adventures. High efficiency drivers reach 2-3x the volume of typical speakers for the same wattage. Measured bass extension of 55Hz (-10dB).
Cons: Not as loud as the other Soundboks. Not as neutral or as much bass as the above Partyboxes. Not stereo. External power brick for charging. Discontinued; Soundboks has removed it from their lineup and the product page is gone.
Full Soundboks Go review and specifications →
| Amplifier Power | 2 x 72W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 55Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 18” x 12” x 10” (457.2 x 304.8 x 254 mm) |
| Drivers | 10” woofer, 1” tweeter |
| EQ | No |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Maximum SPL | 121dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | Yes (TeamUp, up to 5 speakers) |
| Power Bank | No |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Yes |
| TWS | No |
| USB Playback | No |
| Weight | 19.8 lbs (9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- GYMCADDY: Soundboks Go Vs Soundboks 3 - Which One Is Right For You? More from GYMCADDY →
- GYMCADDY: Soundboks Go Vs JBL Partybox 310 Vs Sony XP700
- GYMCADDY: Soundboks Go Vs JBL Partybox 110 Vs Sony XP500
- GYMCADDY: Soundboks Go Vs JBL Boombox 2 Vs UE Hyperboom Vs Sony XG500
- Everyday Man: Soundboks Go Vs Turttlebox Vs EcoXGear Defender
- Head-to-Head Comparisons