Retro vintage 15 watt Atlas Sound loudspeaker AP-15 horn speaker

Retro 1970s vintage Atlas Sound public address loudspeaker horn. This speaker is a model AP-15 and marked as 15 watts and 8 ohms. It carries a US patent number from 1969. The horn measures about 8" across and 9" long over the horn and driver. This is in very nice cosmetic condition, but does have some soil from storage.