JBL Boombox 4 VS Marshall Middleton II

The most defining design difference here is sheer scale. The JBL Boombox 4 is a large, party-oriented speaker measuring 506.4 × 262.9 × 212.9 mm and weighing 5890 g, giving it a volume of roughly 28,344 cm³. The Marshall Middleton II, by contrast, sits at 230 × 110 × 98 mm with a weight of just 1800 g and a volume of approximately 2,479 cm³ — making it about 11 times smaller and less than a third of the weight. In practical terms, the Middleton II fits in a backpack or day bag without much thought, while the Boombox 4 is closer to luggable furniture: a two-handed carry that dominates a table or poolside setup.

On water resistance, both are rated waterproof, but the Boombox 4 holds a slight edge with an IP68 rating versus the Middleton II's IP67. IP68 means the Boombox 4 can withstand continuous submersion beyond the standard 1-meter/30-minute threshold of IP67 — a minor but real advantage if the speaker is likely to be near water for extended periods. One practical exclusive of the Boombox 4 is its detachable cable, which simplifies replacement if the cable wears out and adds a degree of versatility the Middleton II lacks.

In this group, the two speakers serve fundamentally different use cases rather than competing head-to-head. The Middleton II clearly wins on portability, being genuinely carry-anywhere in form factor. The Boombox 4 has a marginal edge in water resistance and offers a detachable cable, but its dominant design trait is its size — a deliberate tradeoff aimed at acoustic output rather than convenience. If portability is a priority, the Middleton II is the obvious choice; if the use case is stationary or semi-stationary outdoor use, the Boombox 4's design scales to match.

Raw output power is where these two diverge most sharply. The JBL Boombox 4 delivers 4 × 200W — a total of 800W — while the Marshall Middleton II manages 4 × 80W, totaling 320W. That gap is not subtle: the Boombox 4 is capable of filling large outdoor spaces or loud environments in a way the Middleton II simply is not designed to match. This aligns directly with the size difference established in the design group — the Boombox 4's physical bulk exists in large part to house the hardware needed to push that kind of output.

On frequency response, both speakers share the same 20,000 Hz upper limit, but the Boombox 4 reaches down to 37 Hz versus the Middleton II's 45 Hz. That 8 Hz difference at the low end is meaningful in practice: sub-40 Hz content includes the deepest bass in electronic music, kick drums, and cinematic low-end. The Boombox 4 also includes a dedicated subwoofer driver, which physically reinforces this advantage — passive radiators are present on both units to extend low-frequency response without added power draw, but having an active subwoofer alongside them gives the Boombox 4 a structurally more capable bass architecture.

The Middleton II does hold one exclusive here: a built-in microphone, enabling speakerphone or voice assistant functionality that the Boombox 4 lacks entirely. However, in the context of sound quality specifically, the Boombox 4 holds a clear and multi-layered advantage — greater output power, a lower frequency floor, and a dedicated subwoofer all point in the same direction. The Middleton II is a capable stereo speaker for its size, but it is not competing on the same acoustic scale.

Battery life is remarkably close between these two. The JBL Boombox 4 is rated at 34 hours and the Marshall Middleton II at 30 hours — a 4-hour difference that is worth noting but unlikely to be decisive for most users. What makes the Boombox 4's figure particularly impressive is context: it achieves that runtime while driving nearly two and a half times the output power of the Middleton II. Sustaining 800W of total amplification for 34 hours implies a substantially larger battery, which again ties back to the speaker's size and weight tradeoffs covered in the design group.

Where the gap opens more meaningfully is charge time. The Boombox 4 reaches full charge in 2 hours, while the Middleton II takes 3 hours — 50% longer. For a speaker used in back-to-back sessions or topped up between events, that one-hour difference has real practical value. Neither speaker supports wireless charging, and neither has a removable battery, so both require downtime with a cable. Both do include a battery level indicator, which at least lets users plan around charge cycles without guesswork.

Overall, the Boombox 4 holds the edge in this group. It offers more runtime and charges faster — a combination that points to a more capable and efficient power system, even accounting for its far higher output demands. The Middleton II's 30-hour battery is still strong in absolute terms, but it trails on both key metrics here.

The single most striking number in this group is Bluetooth range. The Marshall Middleton II is rated at 60 meters, while the JBL Boombox 4 caps out at just 10 meters. That is a sixfold difference, and it matters considerably in practice. At 10m, walls, bodies, and obstacles will frequently push the Boombox 4 to its limit — leaving a phone in another room or across a large backyard becomes a real reliability concern. The Middleton II's 60m range provides a substantial buffer against dropouts in open or semi-open environments, which is especially relevant given that both speakers are designed for outdoor use.

Each speaker holds one exclusive codec or feature the other lacks. The Boombox 4 supports Auracast, a Bluetooth broadcast standard that allows a single source to stream simultaneously to multiple receivers — useful for shared listening scenarios without pairing negotiation. The Middleton II, meanwhile, supports AAC, the compressed audio codec preferred by Apple devices, which delivers noticeably cleaner audio transmission compared to standard SBC when pairing with iPhones or iPads. Neither advantage is universal, but each speaks to a specific use case: Auracast for multi-speaker or public broadcast setups, AAC for Apple-ecosystem users who prioritize audio fidelity over the connection. Bluetooth versions — 5.4 on the Boombox 4 versus 5.3 on the Middleton II — are close enough to be functionally equivalent for most users.

On balance, the Middleton II holds the stronger position in this group, primarily due to its dramatically superior Bluetooth range. For a portable speaker used in varied real-world environments, reliable connectivity at distance is a more broadly impactful advantage than Auracast support. The Boombox 4's codec and feature deficits are narrow but real, and the range gap alone is enough to tip this category clearly toward the Middleton II.

This is the rare group where the data tells a clean story: the JBL Boombox 4 and Marshall Middleton II are spec-for-spec identical across every feature listed. Both support wireless use and remote smartphone control, both offer voice prompts for status feedback, and both include a sleep timer — a convenience feature that lets the speaker power down automatically after a set period, useful for falling asleep to music or cutting idle drain. Neither supports fast pairing or voice commands.

This is a clear tie. There is no differentiator to draw from within the provided data, and declaring an edge for either product here would not be supported by the specs. Users prioritizing features in this category can treat both speakers as equivalent and let other groups — sound quality, connectivity, or design — drive the decision.

With only one data point in this group, the conclusion is straightforward: neither the JBL Boombox 4 nor the Marshall Middleton II supports pairing for stereo sound. This means neither speaker can be wirelessly linked with a second unit of the same model to split left and right audio channels across two physical devices — a feature some competing speakers offer to widen the stereo soundstage in a room or outdoor space. For users who were hoping to buy two units and run them as a stereo pair, both products fall short equally.

This is a tie by omission — both share the same limitation, and no edge can be awarded to either. The absence of this feature is more notable for the Boombox 4 given its positioning as a high-output, large-venue speaker, where a true stereo pair setup would be a natural extension. For the Middleton II, which already handles stereo internally, the gap is somewhat less impactful in practice. Regardless, the provided data does not support drawing a distinction between the two products here.