The red and white RCA jacks are fixed outputs, meaning that the volume level adjusted on the television doesn't have any effect on the volume sent out through the RCA jacks.

What might you try if you just want to add a little extra volume to your experience "without breaking the bank", so to speak, is to purchase a small bookshelf system or portable radio that has an AUX RCA (red and white audio input) and a remote and control your volume through that.

Does that help?