I pushed them hard and no pops or cracks. Grills do not remove. Get ready to enjoy an unparalleled experience of music with this pair of Acoustic Research AR 206 HO bookshelf speakers. Perfect for any audiophile, these rectangular-shaped speakers come in classic black color and connect easily with a wired setup. These front right and left speakers are the ideal choice for those who want to take their home audio system to the next level. Thanks, have fun and thanks for stopping by! In order to do this, I often use recycled boxes, please overlook any old labels, tape etc. Please consider the environmental impact. I will not discount any further due to weight and volume charges.