Hi Guys, i'm after some advice i have a trace elliottt combo which has a 10 inch in an enclosed bin type arrangement it sounds punchy but not enough warmth and bottom end. I can add another cab it has another speaker jack which will run another at 8 ohms so the amp would be running at 4 ohms. I can also unplus the internal speaker and run 2 8 ohm cabs or a 4 ohm cab. Any advice on speaker size, brands and setups would be appreciated. I play an active fendr p bass us made circa 1980 and after a nice warm typical p bass sound for palying blues.