I have a DXP system and can't seem to get my music on hold volume up very loud. I'm connected via the board inside the system (RJ11 connector pins 1 & 6) to RCA connectors and then back down to the connector that plugs into the MP3 player (head phone connector)

I have seen mention of a 8ohm to 1000ohm audio transformer that I can pick up at Radio Shack. Would this work in this situation ?

Thanks