https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2138707#M2085 <P>What is SS-MB250 woofer's surround made from? Is it rubber, poliurethane foam or another material? What about it's lifetime?</P><P><IMG src="https://community.sony.sk/t5/image/serverpage/image-id/310409i979FB71F5AEEC967/image-size/original?v=mpbl-1&amp;px=-1" alt="ss-mb250.jpeg" title="ss-mb250.jpeg" border="0" /></P> Wed, 02 Mar 2016 04:47:19 GMT Grimbart 2016-03-02T04:47:19Z https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2138707#M2085 <P>What is SS-MB250 woofer's surround made from? Is it rubber, poliurethane foam or another material? What about it's lifetime?</P><P><IMG src="https://community.sony.sk/t5/image/serverpage/image-id/310409i979FB71F5AEEC967/image-size/original?v=mpbl-1&amp;px=-1" alt="ss-mb250.jpeg" title="ss-mb250.jpeg" border="0" /></P> Wed, 02 Mar 2016 04:47:19 GMT https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2138707#M2085 Grimbart 2016-03-02T04:47:19Z https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2138903#M2086 <P>Hi Grimbart,</P> <P>welcome to the Sony User Community Forum..</P> <P>Looking at the picture I would guess it's Polyurethane.. I can't say if Sony give this a lifetime figure but looking around some audio sites it seems 15-20 years is an average figure but it would depend on placement &amp; how the speakers are cared for..</P> Wed, 02 Mar 2016 11:37:50 GMT https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2138903#M2086 Thalamus. 2016-03-02T11:37:50Z https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2145525#M2090 <P>So I have bought a pair of these speakers. Totally disassembled at this moment for upgrade. Read me later about construction and components.</P> Sat, 12 Mar 2016 17:10:07 GMT https://community.sony.sk/t5/hi-fi-systems/ss-mb250h-bookshelf-speakers/m-p/2145525#M2090 Grimbart 2016-03-12T17:10:07Z