{"product_id":"mackie-thump-18s-v4-active-pa-subwoofer","title":"Mackie Thump 18S V4 18\" Active PA Subwoofer","description":"\u003ch5\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/bzP9--xFRnU?si=pcrWftsZXhv7Ib80\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h5\u003e\n\u003ch2\u003eThe Mackie Thump 18S V4 is an 18\" 1400W Active PA Subwoofer delivering 132dB maximum SPL and a floor-shaking 25Hz low-frequency response, with four selectable high-pass modes for seamless PA system integration.\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Mackie Thump 18S V4 steps up from the Thump 15S V4 with a larger 18\" high-performance woofer that reaches an exceptional 25Hz low frequency — two Hertz deeper than the Thump 15S V4 — for the most authoritative, floor-shaking bass performance in the Thump V4 subwoofer range. Combined with a 1400W Class-D amplifier delivering 132dB maximum SPL, the Thump 18S V4 provides the kind of deep, powerful and physical bass that gets people on their feet and makes moments that leave a lasting impression. Whether paired with Thump V4 loudspeakers for a complete professional PA system, or used to add serious low-end reinforcement to an existing setup, the Thump 18S V4 brings complex basslines, punchy kicks and the deep bass foundation that transforms any PA system from good to genuinely impactful.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSelectable High Pass Modes for Perfect Integration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLike the Thump 15S V4, the Thump 18S V4 features four selectable high-pass modes that take the guesswork out of subwoofer and loudspeaker integration. Thump 12 mode sets a 140Hz crossover for Thump 12 V4 loudspeakers, Thump 15 mode sets a 110Hz crossover for Thump 15 V4 loudspeakers, and Thump GO mode sets a 150Hz crossover for Thump GO loudspeakers — each pre-configured for the optimal crossover point with a specific Thump V4 model. All modes include a 1.4ms alignment delay for phase-coherent system integration, ensuring a seamless and well-integrated combined response between the subwoofer and loudspeakers. A Variable mode allows the crossover frequency to be set manually for use with any third-party loudspeaker, making the Thump 18S V4 equally at home in mixed or non-Thump PA systems.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eVersatile I\/O \u0026amp; System Configuration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Thump 18S V4 provides a comprehensive range of input, output and configuration options for flexible system design. Stereo XLR inputs accept signals from DJ controllers, mixers and other source equipment, whilst stereo high-pass XLR outputs feed connected loudspeakers with the correctly filtered signal. Stereo full-range XLR outputs pass the complete unaltered signal to a second subwoofer for expanded low-end coverage in larger systems. Phase invert, stereo or mono summing for single or dual subwoofer deployment, and a variable level control from muted to +6dB allow precise system configuration and output balancing. A defeatable front LED provides a clean stage presentation when required.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBuilt-Like-A-Tank™ with Smart Pole Mount\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Thump 18S V4's Built-Like-A-Tank™ construction ensures touring-grade durability and reliability for regular gigging, whilst built-in handles keep it manageable for transport despite the larger 18\" driver configuration at 31.9kg. An M20 threaded top accommodates the Mackie SPM400 speaker pole (sold separately), allowing a Thump V4 loudspeaker to be pole-mounted directly above the subwoofer — creating a compact, self-contained and space-efficient PA stack that projects sound across the entire area whilst keeping the floor space clear.\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMackie Thump 18S V4 Key Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e1400W Class-D Amplifier:\u003c\/strong\u003e Delivers 132dB maximum SPL and a floor-shaking 25Hz low-frequency response for the most powerful bass performance in the Thump V4 subwoofer range.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e18\" High-Performance Woofer:\u003c\/strong\u003e Reaches a remarkable 25Hz low frequency for complex basslines and deep sub-bass that is felt as much as heard.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFour Selectable High-Pass Modes:\u003c\/strong\u003e Thump 12 (140Hz), Thump 15 (110Hz), Thump GO (150Hz) and Variable — each optimised for seamless loudspeaker integration with 1.4ms alignment delay.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStereo XLR Inputs:\u003c\/strong\u003e Flexible connectivity from DJ controllers, mixers and other source equipment.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStereo High-Pass XLR Outputs:\u003c\/strong\u003e Feed connected loudspeakers with the correctly filtered signal for seamless sub and top integration.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStereo Full-Range XLR Outputs:\u003c\/strong\u003e Pass the complete unaltered signal to a second subwoofer for expanded low-end coverage.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStereo \u0026amp; Mono Summing:\u003c\/strong\u003e Supports both single and dual subwoofer deployment configurations.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eVariable Level Control:\u003c\/strong\u003e Muted to +6dB output level adjustment for precise system balancing.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePhase Invert:\u003c\/strong\u003e Flexible phase alignment for different deployment configurations.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDefeatable Front LED:\u003c\/strong\u003e Clean stage presentation when front-facing LED illumination is not required.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eM20 Speaker Pole Thread:\u003c\/strong\u003e Accommodates the Mackie SPM400 speaker pole (sold separately) for mounting a Thump V4 loudspeaker directly on top.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBuilt-Like-A-Tank™ Construction:\u003c\/strong\u003e Touring-grade durability with built-in handles for practical transport and loading.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mackie","offers":[{"title":"Default Title","offer_id":57112586092917,"sku":"THUMP18SV4","price":809.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2083\/7259\/files\/preview_33.jpg?v=1777461522","url":"https:\/\/www.audiovolt.co.uk\/products\/mackie-thump-18s-v4-active-pa-subwoofer","provider":"Audio Volt ","version":"1.0","type":"link"}