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Marshall Kilburn III speaker with 50-hour battery, 4-inch woofer launched

Marshall brings back its portable speaker series with the new Kilburn III, featuring longer battery life, Bluetooth 5.3, and dust and water resistance.

Updated on: May 28, 2025 11:38 AM IST

Marshall has introduced the Kilburn III, its newest portable Bluetooth speaker, seven years after launching the second-generation model. The latest speaker brings significant upgrades, including a battery that runs for more than 50 hours on a full charge. This duration more than doubles the playtime offered by its predecessor. Let’s take a closer look at its specifications and what the new speaker has to offer.

Marshall Kilburn III Speaker: Specifications and Features

Marshall Kilburn III speaker with a 50-hour battery, Bluetooth 5.3 support, and IP54-rated protection, has been launched. (Marshall)
Marshall Kilburn III speaker with a 50-hour battery, Bluetooth 5.3 support, and IP54-rated protection, has been launched. (Marshall)

Ijaj Khan is a technology journalist and Senior Content Producer at Hindustan Times, with over three years of experience covering the consumer technology industry. His work spans smartphones, laptops, wearables, gaming, appliances and AI - from hands-on reviews, comparison and buying guides to breaking news and in-depth features that help readers cut through the noise and make informed decisions. Before joining HT Tech, he worked with Jagran New Media, where he sharpened his instincts for fast-paced digital reporting. He holds a Post Graduate Diploma in English Journalism and Mass Communication from the Indian Institute of Mass Communication (IIMC), Delhi. Whether he's testing the latest flagship smartphone, tracking a major AI announcement, or putting a gaming laptop through its paces, Ijaj approaches every story with the same goal - making technology feel relevant and easy to understand for everyday users, not just enthusiasts. When he's not in front of a screen for work, he's usually travelling to a new city, hunting for great food, or keeping tabs on what's next in tech before everyone else catches on.

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The Marshall Kilburn III offer a 360-degree sound using a 4-inch woofer and two 2-inch full-range speakers. The audio system is driven by one 30W Class D amplifier for the woofer and two 10W Class D amplifiers for the full-range drivers. It claims to reach a sound pressure level of up to 91 dB SPL at a distance of one meter. A bass reflex system supports the low-end output. The cabinet is designed to deliver stereo sound without blind spots, as per the company.

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Furthermore, the speaker supports Bluetooth 5.3, which enables multipoint connectivity and a wireless range of up to 10 meters. For those who prefer a wired connection, a 3.5 mm AUX input is also included. The supported audio codecs are SBC, LC3, and MPEG-2 AAC. The device does not include any built-in microphones.

Control features are positioned on the top panel. Users can adjust volume, bass, treble, and toggle power. The panel also has buttons for media control, Bluetooth pairing, and mode selection. A USB-C port allows the speaker to charge other devices, which also effectively functions as a power bank.

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The speaker’s dimensions measure 273 x 150 x 169 mm, and it weighs 2.8 kg. Buyers can choose between Black and Brass or Cream colour options. The product uses 38 percent recycled materials and is compatible with the Marshall Bluetooth app.

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Marshall Kilburn III Speaker: Price and Availability

The Kilburn III speaker is priced at 349 euros (around Rs. 33,749) and is available for purchase on Marshall’s website, and will be available in retail stores from June 10.

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