# Marshall Stockwell III wireless speaker now available New portable speaker with 40-hour battery and IP55 water resistance - **Source:** [Mashable](https://brifing.si/source/3cd6d1d0-9c29-4750-8bc9-f2afefb52505) - **Published:** 2026-08-04 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/4040fe72-e224-408e-a33d-20c8e1beaf86 ## Next-gen portable speaker Marshall's Stockwell III model has hit the market with a price tag of $249.99. The device doubles the battery life from 20 to over 40 hours compared to its predecessor and features IP55 water and dust resistance certification. The speaker also functions as a power bank for external devices. USB-C rechargeable, it achieves full charge in under 3 hours with a 30W power adapter. ## Continued audio excellence The Stockwell III maintains Marshall's True Stereophonic 360-degree sound technology. The system consists of a 3-inch woofer and two 1.75-inch wide-band drivers, supported by a 65W power amplifier for the woofer. The previous Stockwell II model received praise from PCMag for its 'rich bass and bright highs'. The new model further enhances this sound quality. ## Durability and ease of use The device's water and dust resistance has been upgraded from IPX4 to IP55 level, meaning it can withstand more than light splashes. The top features tactile amplifier-inspired controls. The new M-button provides direct access to saved presets while offering Bluetooth 5.3 and Auracast support. ## Sustainable design One of Stockwell III's most notable features is its replaceable battery. Users can install a new battery when capacity diminishes rather than discarding the speaker. Front and rear grilles, silicone sleeve, and carrying strap are also user-replaceable. This offers a rare advantage in the typically disposable Bluetooth speaker market. ## Fast charging capability The device provides 7 hours of playtime from just 20 minutes of quick charging. Full charge completes in under 3 hours. Multipoint connectivity allows pairing with multiple devices simultaneously. With these features, Marshall aims to deliver a design prioritizing user experience. ## Pricing strategy Marshall maintained the same $249.99 price point as the previous generation while implementing significant hardware improvements. This positions the product competitively in the premium portable speaker market. It's currently available through Marshall's official site and Costco. The company recently made headlines with its custom amplifier for Green Day's Billie Joe Armstrong. ## Technical specifications The speaker weighs 1.5 kg. The combination of silicone sleeve and metal grille offers both durability and style. The carrying strap enables easy transportation. Inspired by Marshall's iconic amplifier design, the aesthetic appeals to music enthusiasts. Dimensions measure 18x9x9 cm. ## Market impact The Stockwell III launch could set new standards in the portable speaker market. With its long battery life, high audio quality, and sustainable design, the product stands out from competitors. Marshall's move reflects growing demand for eco-friendly products in consumer electronics. The product's success may encourage other manufacturers to develop similar features. ## Sources covering this story - https://mashable.com/tech/marshall-stockwell-iii-where-to-buy — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._