The Marshall Middleton II carries an IP67 rating, confirming full waterproof protection with a submersion depth tolerance of up to 1 meter, and its water resistance classification reflects that same standard. The unit measures 230 × 110 × 98 mm with a total volume of 2,479.4 cm³ and weighs 1,800 g, giving it a substantial but portable physical profile. It uses a neodymium magnet and features an on-device control panel for direct playback management. The speaker does not include a travel bag, touch screen, RGB lighting, detachable cable, or remote control, nor is it a neckband-style design.
The Marshall Middleton II features stereo speakers driven by four 80W drivers for a combined output of 320W, covering a frequency range from 45 Hz to 20,000 Hz, with a passive radiator assisting low-frequency reproduction in the absence of a dedicated subwoofer. The speaker reaches a sound pressure level of 97 dB/mW and does not include magnetic shielding. For voice and call functionality, it carries a single microphone, though noise cancellation is not supported on that mic.
The Marshall Middleton II is equipped with a built-in rechargeable battery rated for 30 hours of playback, with a full charge taking 3 hours. A battery level indicator keeps the remaining charge visible at a glance. The battery is not removable and the speaker does not support wireless charging, so power must be supplied through a wired connection.
The Marshall Middleton II connects wirelessly via Bluetooth 5.3 with a maximum range of 60 meters and supports multipoint pairing with up to two devices simultaneously. The only supported audio codec over Bluetooth is AAC; aptX in all its variants, LDAC, LE Audio, and Auracast are not available. For wired connectivity, the speaker includes one USB Type-C port but no 3.5mm audio jack socket, no AUX input, and no 3.5mm male connector. It does not support Wi-Fi, AirPlay, Chromecast, DLNA, Ethernet, NFC pairing, external memory, or microphone input.
The Marshall Middleton II operates fully wirelessly and supports remote control via a smartphone, while voice prompts provide audio feedback during use. It also functions as a power bank, allowing it to charge external devices, and includes a sleep timer for scheduled playback shutoff. Fast pairing, voice commands, and a built-in radio are not part of the feature set.
The Marshall Middleton II does not support stereo pairing, meaning it cannot be linked with a second unit to create a two-speaker stereo configuration.