How old is your belt? What do you have the P3/24 sitting on?
The two things that would tighten up the bass and overall presentation would be a less elastic drive system (tighter belt, rim drive, or direct drive) AND better resonance control. The RB301 is an undamped tonearm; wrap some teflon pipe thread tape around the wand. You might experiment with better mats, aftermarket feet or brass cones, and a vibration absorbing platform (e.g., butcher block cutting board).
You may also need a new belt. The external power supply may be compensating for a loosening belt which is still revealing itself with a tubby presentation.
I have a Technics SL1210 M5G with Audio Technica AT150MLX cart. It has some additions to dampen and control vibrations and resonances (better mat, fluid damper, tonearm wrap, brass cone footers, butcher block platform, gel pads underneath). The tonal balance and clarity is very similar to the CD, but with the more organic presentation and wealth of air and detail that comes with LP.
The two things that would tighten up the bass and overall presentation would be a less elastic drive system (tighter belt, rim drive, or direct drive) AND better resonance control. The RB301 is an undamped tonearm; wrap some teflon pipe thread tape around the wand. You might experiment with better mats, aftermarket feet or brass cones, and a vibration absorbing platform (e.g., butcher block cutting board).
You may also need a new belt. The external power supply may be compensating for a loosening belt which is still revealing itself with a tubby presentation.
I have a Technics SL1210 M5G with Audio Technica AT150MLX cart. It has some additions to dampen and control vibrations and resonances (better mat, fluid damper, tonearm wrap, brass cone footers, butcher block platform, gel pads underneath). The tonal balance and clarity is very similar to the CD, but with the more organic presentation and wealth of air and detail that comes with LP.