Marshall Bromley 750 Review: Rock and Roll Meets the Party

Our Verdict

Marshall has built its legendary reputation on amplifiers that have powered rock and roll for over six decades. Now, the iconic British brand makes its bold entry into the party speaker market with the Bromley 750—and it's immediately clear this isn't just another bass-heavy party box. ## Design: Heritage Meets Practicality From the moment you lay eyes on the Bromley 750, its Marshall DNA is unmistakable. The textured PU leather exterior evokes the classic Tolex covering of vintage Marshall amps, the signature "salt and pepper" metal grille dominates the front, and the brushed brass Marshall script logo sits proudly at the centre. This is a speaker that commands attention without shouting for it. But Marshall hasn't prioritized style over substance. At 23.8kg, this is a substantial piece of kit, yet the thoughtful design makes it surprisingly manageable. Two wide, silicone-covered handles on each side provide excellent grip, while reinforced corners with integrated shock absorption mean you won't damage your floors when setting it down. The coup de grâce? A telescopic metal trolley handle and smooth-rolling silicone wheels that transform the Bromley 750 into easily towable luggage for longer distances. The IP54 rating provides peace of mind for outdoor use—it'll handle light rain and splashes without complaint, though you wouldn't want to leave it out in a downpour. ## Audio Performance: Power with Poise Marshall has equipped the Bromley 750 with an impressive eight-driver configuration designed for true 360-degree sound dispersion. Two 25cm woofers (one front, one rear) handle the low-end with 150W each, two 13cm mid-range drivers fire from the sides, and four tweeters are strategically placed around the enclosure for omnidirectional high-frequency coverage. The sonic result is spectacular. The bass is the star of the show—deep, physical, and impactful without ever becoming boomy or muddy. Whether it's the thunderous opening of AC/DC's "Thunderstruck" or the syncopated low-end of Billie Eilish's "bad guy," the Bromley 750 delivers bass that you feel as much as hear. Crucially, even at party-shaking volumes, the low-end remains tight and controlled. The mid-range is intentionally recessed, a clever acoustical choice that prevents listener fatigue at high volumes and keeps vocals clear without becoming harsh. The treble is crisp and detailed, with no trace of sibilance or hardness. The 360-degree sound field is genuinely impressive—walk around the speaker and the sonic balance remains remarkably consistent. What truly sets the Bromley 750 apart is its tonal flexibility. The front-mounted analogue controls—complete with satisfying rotary potentiometers—include dedicated bass and treble adjustments, plus a "Sound Character" knob that acts as a dynamic compressor. You can dial in anything from gentle background music to face-melting rock concert levels, all without touching your phone. ## Features: Old School Meets New Tech Marshall has struck an excellent balance between tactile, analogue control and modern connectivity. The physical interface is a joy to use—proper metal-ringed potentiometers with smooth action, a classic rocker power switch that clicks with authority, and clearly labeled inputs protected by IP54-rated flaps. Connectivity is comprehensive. Bluetooth 5.3 with support for SBC, AAC, and the modern LC3 codec provides reliable wireless streaming up to 70 meters (with compatible sources). The inclusion of Auracast is particularly forward-thinking—you can broadcast audio to unlimited compatible devices or link multiple Bromley 750 speakers wirelessly for truly massive coverage. For musicians and performers, there's a combo XLR/jack input for microphones with phantom power, a dedicated instrument jack for guitars or basses, and both have independent volume controls with studio-quality reverb effects. Add stereo RCA line inputs, a 3.5mm aux jack, and USB-C audio, and you're covered for virtually any source. The Marshall Bluetooth app is surprisingly restrained—in a good way. It handles source selection, displays battery status, manages firmware updates, and lets you customize the programmable M button, but doesn't try to replace the excellent physical controls. This is refreshingly sensible. ## Battery Life: Freedom from Outlets The removable 97.2Wh battery is a game-changer. Marshall claims over 40 hours at moderate volumes (around 33% level), which we can believe based on the measured 2.5W power consumption at that level. More realistically, at party-appropriate volumes (75-80%), expect 4-6 hours of runtime. Push it to maximum and you'll still get around 3 hours. But here's the brilliance: the battery simply slides out from a rear compartment. Buy a spare (sold separately), and you have effectively unlimited runtime. The battery also functions as a power bank via its USB-C port—handy for charging phones during outdoor events. Charging is impressively fast thanks to USB-C Power Delivery support at 50W. A full charge takes just over two hours, or about 90 minutes to reach 80%. You can charge the battery separately or plug the entire speaker in—your choice. ## Lighting: Subtle Sophistication Unlike competitors plastered with RGB light shows, Marshall has opted for tasteful white LED stage lighting that syncs with the music. It's more "intimate gig venue" than "nightclub," which fits the Marshall aesthetic perfectly. You can trigger strobe effects via the app or the customizable M button, but overall, the lighting takes a back seat to the audio—as it should. ## Living with the Bromley 750 After extensive testing across various scenarios—garden parties, indoor gatherings, and even a small acoustic gig—the Bromley 750 consistently impressed. The combination of genuine 360-degree sound, extraordinary bass depth, and the flexibility of the tone controls means it adapts to any situation. The removable battery is genuinely liberating. No longer are you constrained by the distance to the nearest outlet or anxiously watching battery percentage. Just swap in a fresh battery and keep going. Build quality is exceptional. Every material feels premium, every control operates with precision, and the attention to detail—from the silicone-damped wheels to the weatherproof connector covers—speaks to Marshall's commitment to quality.