B & W 801 S3 bass alignment filter


Is there a difference between bass alignment filters for 801 S2 and 801 S3 and how to spot the difference. Will 801S2 filter work with 801 S3?. Thanks
pvctor
Just to be more specific, I am interested in differences, if any, for B & W made filters.
Someone posting on your last thread about 801s owned several different bass alignment filters. Read through your last thread to find him and send him a message.

I would go with the B&W bass alignment filter because I am a stickler for wanting to hear it the way the engineers intended it to be.