Acoustic System Intl. Resonators

Acoustic System Resonators in as New Condition.  I have two listening rooms and use them in both systems, these are extras I no longer need.  It's amazing how these improve the sound in your room.  I am selling a set of 4 - 1 copper, 1 gold, and 2 silver.  Although they work individually, Acoustic Systems recommends at least 4 in this configuration placed as follows.  Copper,  low on front wall between speakers about 6" from floor for bass.  Gold on front wall about tweeter height for midrange, and one silver on front wall near the ceiling and the other silver on the back wall near the ceiling for highs.  Pictures of them mounted are the ones I a currently using in my system.  Complete in original boxes. Buyer pays actual shipping and 3.2% PayPal fee.