Marshall Acton IV Black Coluna portátil

Marshall Acton IV Black — compact stereo home speaker with amp-inspired character

The Marshall Acton IV Black translates the brand's stage amp heritage into a compact, bookshelf-friendly Bluetooth speaker for the home. Improved tweeters and redesigned waveguides create a wider stereo soundstage, while a downward-firing bass-reflex port keeps low frequencies tight and clean at higher volumes. Dynamic loudness processing adapts the tonal balance so the speaker sounds consistent whether playing quietly at night or pushed to full volume.

What makes this fourth-generation model stand out

Built-in Auracast™ multi-speaker connectivity pairs with LDAC high-resolution Bluetooth streaming, letting this model join a synchronised multi-room setup while still delivering certified high-res wireless audio. The redesigned bass-reflex port, engineered in Stockholm, uses a tapered geometry that reduces air loss and keeps bass clean when pushed loud. A removable fret grille plus replaceable knobs and feet let the speaker be serviced rather than replaced.

Driver layout and amplification — built for stereo depth

Behind the brass top panel sits a dynamic driver array powered by dedicated Class D amplifiers, giving the Acton IV genuine stereo playback rather than mono simulation.

• Woofer: 4" (102 mm) dynamic driver — delivers low-end punch through the downward-firing bass-reflex port
• Tweeters: 2 × 0.75" (19 mm) with waveguides — spread high frequencies across a wider area
• Amplification: 60 W Class D for the woofer + 2 × 25 W Class D for the tweeters — 110 W total
• Max SPL: 95 dB @ 1 m — enough headroom for medium-sized rooms
• Bluetooth 5.3 with Auracast™ — streams LDAC high-res audio and links multiple speakers

Who the Acton IV Black is for

The Acton IV Black suits vinyl owners, apartment dwellers, and design-conscious listeners who want a compact stereo speaker with real RCA turntable support. It also fits anyone streaming high-res audio from an Android device via LDAC and planning to expand into multi-room playback through Heddon or any Auracast™ broadcaster. At 2.65 kg and 260 × 171 × 150 mm, it slips onto a shelf without dominating the space.

Designed in Stockholm, built to last

Engineered in Sweden and assembled in Thailand, the Acton IV continues Marshall's tradition of translating stage amp heritage into domestic audio. The fourth generation adds FSC-certified MDF construction, 13% recycled material by weight, and a serviceable design with spare grilles, knobs, and feet available from the brand.