Marshall Kilburn III Portable Bluetooth Speaker – Black & Brass

Key Specifications & Audio PerformanceAcoustic Setup: It features a 50-watt active stereo system utilizing a bass-reflex design. This includes one 4-inch woofer and two 2-inch full-range drivers.True Stereophonic Sound: Marshall’s unique 360-degree multi-directional audio engineering eliminates blind spots. It ensures a wide and even soundstage from any listening angle.Frequency & Power: Delivers a maximum sound pressure level of 91 dB with a frequency response starting down at 45 Hz. The sound signature prioritizes clean, well-rounded mids and crisp highs.Dynamic Loudness: Automatically balances and adjusts the bass, mids, and treble so the audio remains highly detailed even at maximum volume.Design, Build & PortabilityRetro Amplifier Aesthetic: Built with iconic Marshall styling, it features textured faux leather (vegan PU leather), a gold metal grille, a classic script logo, and a plush velour-lined guitar-style carrying strap.Tactile Controls: The top panel includes a vintage-inspired spring-loaded power toggle switch, standard physical knobs for volume, bass, and treble adjustments, track skip/pause controls, and a dedicated “M-Button” for instant preset access.Durability Rating: Features an upgraded IP54 dust and water resistance rating. This protects it against limited dust ingress and water splashes from any direction, making it highly suitable for outdoor use on patios or camping trips.Weight & Dimensions: Measures roughly 10.75″ x 5.91″ x 6.65″ and weighs 6.17 pounds (2.8 kg), striking a solid balance between presence and portable handling.Connectivity & Battery PowerUnmatched Battery Life: Offers up to 50+ hours of continuous playtime on a single charge. Real-world rigorous testing measures over 23 hours at high volumes, outperforming most competitors in its weight class.Built-in Power Bank: The bidirectional USB-C port lets you utilize the speaker’s massive battery to reverse-charge your smartphone or tablet on the go.Advanced Wireless Tech: Equipped with Bluetooth 5.3 supporting multi-point pairing for up to two devices simultaneously. It is LC3 and LE Audio ready for optimized efficiency and low latency.Wired Input: Includes a standard 3.5mm auxiliary input for connecting legacy media players or instruments.App Support: Works alongside the Marshall Bluetooth app (iOS and Android) to provide five-band graphic EQ tuning, placement compensation settings, and firmware updates.Notable LimitationsNo Microphone: It completely lacks a built-in microphone. It cannot be used for hands-free speakerphone calls or voice assistant activation.No Wireless Stereo Link: You cannot wirelessly daisy-chain two Kilburn III units together to create a broader left/right true wireless stereo configuration