Marshall, a well-known brand in the audio industry, is updating its Stanmore line of Bluetooth speakers with the release of the Stanmore IV. This is the fourth version of the Stanmore model, offering several upgrades. The speaker features 110 W of amplification, a redesigned bass reflex port, waveguide tweeters, and support for Bluetooth 5.3 with advanced codecs like LDAC and Auracast. It also includes an automatic sound adjustment function that maintains a balanced audio experience regardless of the volume level. The Stanmore IV has dimensions of 35 cm x 18.5 cm x 20.3 cm and weighs 3.99 kg. It is intended for indoor use only and is not waterproof or IP-certified. The speaker is constructed from FSC-certified medium-density fiberboard (MDF) with 16% recycled materials, and spare parts such as buttons, feet, and grilles are available for replacement. Inside the Stanmore IV, there is a two-way speaker configuration: a 13 cm woofer powered by 60 W of amplification and two 1.9 cm tweeters mounted on waveguides, each amplified by 25 W. The waveguides are a new feature that helps spread high-frequency sounds more evenly throughout the room. The bass reflex port, which allows for deeper bass, has been redesigned with a more aerodynamic shape to improve airflow and reduce noise at higher volumes. Marshall claims the speaker has a frequency response range from 36 Hz to 38,000 Hz and can reach a maximum sound pressure level of 97 dB at 1 meter. The Stanmore IV now uses Bluetooth 5.3, supporting high-resolution audio codecs like LDAC from Sony, as well as SBC and AAC. It also includes LC3 and Auracast, which allows the speaker to be part of a synchronized multi-speaker setup with other compatible Marshall models. Users with older Stanmore III or Acton III speakers can connect them to the Marshall Heddon hub (priced at 199 euros) to integrate them into the same broadcast system. The Marshall app provides features like firmware updates, customizable bass and treble settings with five-band equalization presets, and a placement compensation function that adjusts sound based on the speaker's position. A Dynamic Loudness feature automatically adjusts the tonal balance depending on the volume level, enhancing bass and treble at lower volumes and balancing them out at higher volumes. The Stanmore IV is designed for living rooms ranging from 25 to 40 square meters, where it can serve as a replacement for a small hi-fi system. It can also be used in smaller spaces like a bedroom or office, though it may feel bulky in rooms under 12 square meters. Priced at 399 euros, it faces competition from models like the Sonos Era 300 (around 379 euros) and the JBL Authentics 300 (around 249 euros). The older Stanmore III, now nearing the end of its production run, is available at a lower price but offers less powerful sound.