Description:<br>100% brand new and high quality<br> <br>Features:<br>The bass radiator is also called passive speaker. It is used to replace the inverted tube. <br>It has low frequency dive depth, fast sense of speed, low wind noise.<br>It is suitable for all kinds of speakers and other devices.<br>It can transfer the burden of producing bass from small-sized bass unit to larger-sized passive radiator (if the bass unit wants to produce the same loudness sound in the frequency range at the "- 3dB" point, it needs a large amount of air flow propulsion). At this time, the passive radiator can carry out a larger linear vibration (internal and external reciprocating motion of the paper basin).<br>The low frequency response point extends lower. The design uses a smaller size of bass unit, which makes the bass and if response more accurate and better separation.<br>Various colors and sizes to choose from. Easy and convenient to use and operate.<br>Speaker Diaphragm Auxiliary only, other accessories demo in the picture is not included<br> <br>Specifications:<br>Item Type: Speaker Diaphragm Auxiliary<br>Material: Rubber+Metal<br>Size: Diameter: 48mm/1.8in, 56mm/2.2in, 78mm/3.07in<br>Color: Black, Red, Blue<br>Quantity: 2 PCS<br> <br>Note:<br>No retail package.<br>Transition: 1cm=10mm=0.39inch<br>Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.<br>Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you<br> <br>Package Includes:<br>2 x Speaker Diaphragm Auxiliary