One of the best callers I used was a Sonny battery powered remote speaker from a sound system/computer hooked up to a Walkman CD player. Talk about great sound. The JS "Distressed Doe" would make you cry. I could play books on CDs on the way out, After I put together a remote caller with a Nady video recorder sound system I used the speaker and CD player in the semi to lister to books while on the road and in camp to listen to music.
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After the first shot the rest are just noise.
Make mine a Minaska.
Heaven has rules and walls, He-l has open borders