Columbia #4 "Heavy" Reproducer On Ebay
Posted: Mon Jan 15, 2018 7:07 am
https://forum.talkingmachine.info/
https://forum.talkingmachine.info/viewtopic.php?f=14&t=33708
To get more volume. These were used on five-inch machines.Phototone wrote:Can someone explain the reason there is a "heavy" version of this?