{"product_id":"wharfedale-pro-delta-ax15b-900w-active-pa-subwoofer","title":"Wharfedale Pro DELTA AX15B 15\" 900W Active PA Subwoofer","description":"\u003ch2\u003eThe Wharfedale Pro DELTA AX15B is a 15\" 900W Continuous Class-D Active PA Subwoofer engineered for professional PA systems demanding deep, powerful and reliable bass reinforcement.\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Wharfedale Pro DELTA AX15B is a commanding 15\" active subwoofer engineered to provide the deep, powerful low-end foundation that professional PA systems demand in live sound, touring and fixed installation environments. Built around a high-efficiency Class-D amplifier delivering 900W continuous and 1800W peak power, the DELTA AX15B reaches up to 130dB SPL at one metre — ensuring substantial headroom for even the most intense live performance environments. A frequency response spanning 35Hz to 200Hz (-10dB) and 42Hz to 200Hz (±3dB) provides a solid, well-defined low-end foundation that complements full-range loudspeakers without muddying the mix. Whether deployed for live music events, DJ performances, touring rigs or permanent installations, the DELTA AX15B delivers the output, control and reliability that professional audio demands.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eRobust 15\" Driver \u0026amp; Bass-Reflex Enclosure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt the heart of the DELTA AX15B is a 15\" Wharfedale Pro low-frequency driver featuring a heavy-duty 4\" voice coil for exceptional durability and thermal stability under extended high-power use. The bass-reflex cabinet design maximises low-frequency output efficiency for deep, impactful bass reproduction, and the entire driver and cabinet assembly is built to withstand the demands of regular touring and fixed installation use. The enclosure is constructed from 15mm birch plywood — a material chosen for its rigidity, acoustic properties and long-term durability — and finished in a tough Tough-Tone coating for resistance to the knocks and abrasions of professional use. Four recessed, rubberised handles provide practical and comfortable transportation, and a 35mm pole mount socket allows compatible full-range loudspeakers to be mounted directly above the subwoofer for a compact, space-efficient PA stack.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFlexible System Integration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe DELTA AX15B provides a comprehensive range of input, output and configuration controls for seamless integration with a wide variety of full-range loudspeakers and PA system configurations. An adjustable low-pass filter with a crossover frequency range of 80Hz to 200Hz allows the crossover point to be matched precisely to the characteristics of the connected full-range loudspeakers for smooth, well-integrated system response. A 180° phase switch provides flexible phase alignment for different deployment configurations, and a high-pass link XLR output feeds the filtered signal to connected full-range loudspeakers. Balanced inputs accept both TRS jack and XLR connections with a balanced input impedance of 20kΩ and a maximum input level of +22dBu, accommodating a wide range of source equipment.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eComprehensive Protection \u0026amp; Reliability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe DELTA AX15B is equipped with a full suite of protection circuits — clip limiter, thermal protection and DC\/short circuit protection — working together to safeguard both the amplifier and driver during demanding sustained use in touring and fixed installation scenarios. A high-efficiency SMPS power supply with universal mains input (100–120V \/ 220–240V, 50\/60Hz) ensures consistent performance across worldwide operating voltages, and the steel black powder-coated grille provides robust driver protection throughout transport and installation.\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWharfedale Pro DELTA AX15B Key Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e15\" Wharfedale Pro LF Driver:\u003c\/strong\u003e Heavy-duty 4\" voice coil for exceptional durability and thermal stability under extended high-power use.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e900W Continuous \/ 1800W Peak Class-D Amplifier:\u003c\/strong\u003e High-efficiency amplification delivering 130dB maximum SPL for professional PA applications with serious headroom.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e130dB Maximum SPL:\u003c\/strong\u003e Powerful output for the most demanding live sound and touring environments.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e35Hz–200Hz Frequency Range (-10dB):\u003c\/strong\u003e Deep, well-defined low-end foundation for professional bass reinforcement without muddying the mix.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAdjustable Low-Pass Filter (80–200Hz):\u003c\/strong\u003e Precise crossover point matching for seamless integration with any full-range loudspeaker.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e180° Phase Switch:\u003c\/strong\u003e Flexible phase alignment for different deployment and system configurations.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eHigh-Pass Link XLR Output:\u003c\/strong\u003e Feeds filtered signal to connected full-range loudspeakers for clean system integration.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eTRS Jack \u0026amp; XLR Inputs:\u003c\/strong\u003e Balanced connectivity with 20kΩ input impedance and +22dBu maximum input level.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eClip Limiter, Thermal \u0026amp; DC\/Short Protection:\u003c\/strong\u003e Comprehensive protection circuitry for long-term reliability in demanding environments.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e15mm Birch Plywood Enclosure:\u003c\/strong\u003e Rigid, acoustically optimised construction with Tough-Tone finish for professional durability.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBass-Reflex Cabinet Design:\u003c\/strong\u003e Maximises low-frequency output efficiency for deep, impactful bass.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e35mm Pole Mount Socket:\u003c\/strong\u003e For mounting compatible full-range loudspeakers directly above the subwoofer.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e4 x Recessed Rubberised Handles:\u003c\/strong\u003e Practical, comfortable transportation for touring and mobile use.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eHigh-Efficiency SMPS Power Supply:\u003c\/strong\u003e Universal mains input (100–240V) for worldwide compatibility.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSteel Black Powder-Coated Grille:\u003c\/strong\u003e Robust driver protection for touring and installation environments.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wharfedale Pro","offers":[{"title":"Default Title","offer_id":57177424036213,"sku":"DELTA-AX15B","price":699.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2083\/7259\/files\/DELTA-AX15B_Front.png?v=1778667332","url":"https:\/\/www.audiovolt.co.uk\/products\/wharfedale-pro-delta-ax15b-900w-active-pa-subwoofer","provider":"Audio Volt ","version":"1.0","type":"link"}