{"product_id":"square-audio-high-power-portable-subwoofer-wireless-bluetooth-speaker-lithium-battery-40w-100hz-20khz-4-inch-or-6-5-inch-for-desktop-fitness-outdoor-home-karaoke-square-dance","title":"Square Audio High-power Portable Subwoofer Wireless Bluetooth Speaker Lithium Battery 40W 100Hz-20kHz 4-inch or 6.5-inch for Desktop Fitness Outdoor Home Karaoke Square Dance","description":"\u003ch1\u003eSquare Audio High-power Portable Subwoofer with 40W Output and Lithium Battery\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/2403210139250328800.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis square audio subwoofer is built to deliver high-power sound without the restrictions of a mains cable. With a 40W rated output and a frequency range stretching from 100Hz to 20kHz, it produces a balanced audio profile that suits everything from bass-heavy music to clear speech for announcements or karaoke. The unit operates on a robust lithium battery system using 18650 cells, so you can take it from your desk to the park without hunting for a power socket. It features card insertion for direct music playback, a recording function, a voice prompt system, and a money collection broadcast mode – making it especially useful for market traders, outdoor fitness instructors, or anyone who needs portable amplified sound with added utility features. Available in two sizes, the 4-inch version with a standard 4-section 18650 battery and the 6.5-inch version with a standard 6-section 18650 battery, this speaker covers a wide range of volume and runtime needs.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/2403210139250329400.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe subwoofer is designed for practical, high-volume use across multiple scenarios. Its power system and control features set it apart from basic portable speakers, especially for those who need voice prompts or money collection broadcast.\u003c\/p\u003e\u003ch3\u003eHigh-Power Audio\u003c\/h3\u003e\u003cp\u003eWith a 40W rated power, this subwoofer can fill a medium-sized room or outdoor area with sound. The 100Hz-20kHz frequency range delivers a solid bass foundation while maintaining clarity in the mids and highs – suitable for music, karaoke, or spoken announcements.\u003c\/p\u003e\u003ch3\u003eBuilt-in Lithium Battery\u003c\/h3\u003e\u003cp\u003eThe speaker uses 18650 lithium cells, with the 4-inch model running on a standard 4-section pack and the 6.5-inch model on a standard 6-section pack. This provides cordless portability for outdoor use, fitness sessions, or mobile sales stands.\u003c\/p\u003e\u003ch3\u003eVersatile Control Features\u003c\/h3\u003e\u003cp\u003eCard insertion allows playback directly from a microSD card or USB drive. The recording function and voice prompt system make it easy to navigate settings, while the money collection broadcast is a practical addition for cash-based transactions at markets or events.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/2403210139260320200.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis subwoofer is intended for scenarios where portable, high-power audio is needed. Its feature set supports both entertainment and professional tasks.\u003c\/p\u003e\u003ch3\u003eDesktop and Home Use\u003c\/h3\u003e\u003cp\u003ePlace it on a desk or shelf for enhanced computer audio or casual music listening. The voice prompt system makes it simple to control playback without reaching for a phone.\u003c\/p\u003e\u003ch3\u003eFitness and Outdoor Use\u003c\/h3\u003e\u003cp\u003eTake it to the gym, a park, or an outdoor fitness class. The battery power eliminates the need for an extension lead, and the 40W output is loud enough to motivate a group workout.\u003c\/p\u003e\u003ch3\u003eKaraoke and Square Dance\u003c\/h3\u003e\u003cp\u003ePlug a microphone into the 6.5-inch model (which includes a single microphone) for karaoke evenings or community square dance sessions. The money collection broadcast feature is especially useful for busking or charity events.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/2403210139260320900.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe subwoofer offers clear practical advantages for those who want portable audio with extra functionality.\u003c\/p\u003e\u003ch3\u003eCordless Convenience\u003c\/h3\u003e\u003cp\u003eThe lithium battery means you can set up anywhere – from a remote picnic spot to a market stall – without depending on mains power. The choice between 4-inch and 6.5-inch models lets you match battery capacity to your typical runtime needs.\u003c\/p\u003e\u003ch3\u003eMulti-Function Utility\u003c\/h3\u003e\u003cp\u003eRecording, card playback, voice prompts, and money collection broadcast turn a basic speaker into a practical tool for traders, instructors, or performers. These features are built in, so you don't need separate devices.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eIf you need a portable speaker that does more than play music – with voice guidance, recording capability, and a dedicated money collection mode – this subwoofer delivers those functions in a single, self-powered unit. Its 40W output and lithium battery make it suitable for both indoor and outdoor use.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/2403210139260321600.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/3da2e536-bbe7-48af-a47e-8465032c70c4.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/4e8db31d-9292-42ac-a88b-0bfc3b3596b5_fine.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/5fe94f82-b022-493b-8fc5-bd304cef546b.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/b8ae1bc4-7fc5-4c90-8bc4-6a9e13c45269.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Square high-power portable subwoofer with lithium battery, 40W output, card insertion and recording features\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/7648\/2025-11-17\/original-image\/c7dccc16-372b-4cb7-afff-34c63829830f_56df199e-8e0b-4812-b4fd-52d76a3b281c.webp\"\u003e\u003c\/div\u003e","brand":"qydz45-fd","offers":[{"title":"4Inches","offer_id":63804095758713,"sku":"CJYD199271201AZ","price":74.58,"currency_code":"GBP","in_stock":true},{"title":"6.5Inches","offer_id":63804095791481,"sku":"CJYD199271202BY","price":103.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/1781\/0553\/files\/4e8db31d-9292-42ac-a88b-0bfc3b3596b5_fine.webp?v=1781894928","url":"https:\/\/carovelle.com\/products\/square-audio-high-power-portable-subwoofer-wireless-bluetooth-speaker-lithium-battery-40w-100hz-20khz-4-inch-or-6-5-inch-for-desktop-fitness-outdoor-home-karaoke-square-dance","provider":"CaroVelle","version":"1.0","type":"link"}