Need some advise on a Princeton 68 Re-issue speaker swap. It has a stock Greenback in it. It a 8 month old brand new amp that i play once in a while. Dont know if the speaker is broken in yet. My question: can i get something that will be break up a bit more at lower volume? Right now, the amp stays very clean until i get pass 6-7 volume and i never use it pass 3-4. What should i be looking for? I play mostly country, pop, rock and roll, no hard rock. Thanks for the advise.