Lovely pics....man I miss this sub because of its looks.......
So...remove the old sub....check if this sub can fit in the gap.....else get a carpenter.....saw off the bottom plank which holds the old sub...and place the BIC...... if reqd get a GYM tile or Yoga mat etc......
So...remove the old sub....check if this sub can fit in the gap.....else get a carpenter.....saw off the bottom plank which holds the old sub...and place the BIC...... if reqd get a GYM tile or Yoga mat etc......