I started out with a $99 Fender Rumble and at some point realized it wasn't doing even my cheap bass justice. Then I stepped up to a Roland 80 watt bass cube. It was a big step. It has a lot of bells and whistles I don't use. I just set it to where it sounds decent and play. Most of the time I play through the headphone jack. Here's my question: Through the speaker I'm hearing subtle lack of sustain on the B and E string, so the response doesn't match the other strings. I don't hear that lack of sustain under the headphones. I've tried to improve that match by changing strings, but now I'm beginning to think at least some of this comes from the response of the amp and speaker. Based on physics and wattage and whatnot, is that possible? With high fidelity the talk I know about watts is with transients, not sustain, but this is a different ballgame. Last Saturday I went and played a few basses in a music store through an Aguilar 350 with some SL speaker (2x10?) system. That sounded a lot more like what I hear through my headphones with a lot of added air oomph. If I'm going to get so picky what would I need to minimally upgrade for an amp/cabinet or combo to remove any doubt about suspected response issues -- if that's what this is. That Aguilar head/cabinet would be over a grand. I wouldn't think I'd need 350 watts to play in my studio and in small coffee shops, but mostly practice.