Click on the image to check the artwork
By certification 
SW-218B FullRange & Bass Loudspeaker Systems
SW-218B of 5.S brand is a high sound pressure output and ultra-low frequency enclosure embedded in a 18” high-power low distortion unit,The bass horn is designed to bring a close and precise bass response to the wooden box,is the most ideal collocation with LY-15. This product has been equiped with most advanced unit long stroke and great magnetic force that bring a high magnetic flux as a way to increase efficiemcy. A 38mm high and 4 inch voice coil ensures 26mm/PP continuous magnatic force stroke.The most advanced carbon fiber cone ensures the unit procceed with the maximum rigidnity and inertia movement.Adopting the most heat resistant copper flat wire to reduce the power compression during the voice coil heating and to improve the quality and performance.
SW-218B of 5.S brand is a high sound pressure output and ultra-low frequency enclosure embedded in a 18” high-power low distortion unit,The bass horn is designed to bring a close and precise bass response to the wooden box,is the most ideal collocation with LY-15. This product has been equiped with most advanced unit long stroke and great magnetic force that bring a high magnetic flux as a way to increase efficiemcy. A 38mm high and 4 inch voice coil ensures 26mm/PP continuous magnatic force stroke.The most advanced carbon fiber cone ensures the unit procceed with the maximum rigidnity and inertia movement.Adopting the most heat resistant copper flat wire to reduce the power compression during the voice coil heating and to improve the quality and performance.
