I took the 5.5" speakers (pioneer 4ways) out of the sound bar, turned them sideways, with speaker facing out, installed them in the front 4x6 holes (no cutting metal supports) and used zip-ties in the bolt holes to hold them in place then reinstalled the speaker covers. then I installed Sony 6.5" explods 3way speakers in the soundbar. everything fits nicely & secure. now it rocks! top down or just windows out, 75-80mph & music's loud and clear.