Today woke up early, tore $20 coupon and went to Lor 1 Realty Park to do my soundproofing of my 2 front doors.... Did a double layer to improve the sound quality, as the speaker is mounted on the front door... Total damage $108, which is considered quite cheap... But the true fact is not much difference on sound quality, as my setup is quite different from many people... But the door does feel more firm and solid... Anyway thank God for this cheap deal...