THIS IS A ALTEC 604-8K DUPLEX LOUDSPEAKER IT IS IN EXCELLENT CONDITION AND SOUNDS VERY NICE AS WELL I HAVE PLAY TESTED THIS SPEAKER AND IT HAS NO PROBLEMS AT ALL IT IS IN VERY NICE COSMETIC CONDITION AS WELL THE SERIAL NUMBER IS VERY LOW 00465 SO IT IS PART OF THE FIRST 500 EVER MADE  .     IF YOU HAVE ANY MORE QUESTIONS PLEASE ASK THEM BEFORE YOU PURCHASE THANK YOU