{"product_id":"stage21-l-acoustics-ks21-set-of-2","title":"L-Acoustics KS21 – Set of 2 Professional Subwoofers","description":"This set includes two L-Acoustics KS21 subwoofers, delivering compact yet formidable low-frequency performance for professional live sound, rental and fixed installation. Each KS21 features a high-efficiency 21-inch neodymium driver in a well-braced enclosure, providing deep extension down to around 29 Hz and maximum SPL up to 138 dB when properly powered. The cabinets are passive, optimised for use with L-Acoustics amplified controllers, and pair seamlessly with A Series and K Series tops for coherent, musical LF reinforcement. \n\nBoth subwoofers are in like-new condition and have been fully tested by our technical team. The set is supplied with KS21-PLA accessory plates for secure deployment options, plus protective covers to safeguard the cabinets in transit and storage. An L-Acoustics LA12X amplified controller can be added on request to create a turnkey, manufacturer-optimised system. \n\nA solid choice for touring, corporate events, theatres and premium installs, this KS21 pair offers powerful, tight and controlled low end with the reliability and sonic pedigree expected from L-Acoustics.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x L-Acoustics KS21 subwoofers\u003c\/li\u003e\n  \u003cli\u003e2 x KS21-PLA accessory plates\u003c\/li\u003e\n  \u003cli\u003e2 x protective covers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003e\u003cstrong\u003eSTAGE21.6.100.998\u003c\/strong\u003e\u003c\/small\u003e\u003c\/p\u003e","brand":"L-Acoustics","offers":[{"title":"Used Equipment","offer_id":64918067085689,"sku":null,"price":8044.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0288\/2260\/1776\/files\/lacoustics-ks21-2026-soundsale-2.webp?v=1792327700","url":"https:\/\/stage-experts.com\/products\/stage21-l-acoustics-ks21-set-of-2","provider":"Stage Experts Ltd","version":"1.0","type":"link"}