AzWhoFan wrote:
and of course, there are other thing to try:
1- amp and eq. Set the amp to flat - or EQ out - and play at different distances and angles from the amp
2 - room acoustics. If possible try #1 in different rooms, at different levels
3 - Headphones. Can you run your bass through a DI and into some headphones? That'll eliminate factors from #1 and #2.
Volume, Eq, and acoustics are interactive things and can fool your ears quite easily.
What kind of rig are you using?
I think the suggestion to use a quality set of strings is a very good one, it's not unusual to get a dead string now and then in a new pack. The above suggestions are equally important to try. Also, where your rig is set up when you're playing makes a huge difference on how your bass sounds. I no longer am concerned how my bass sounds in my small carpeted, dead sounding studio that I live in, because I know how full and balanced my basses sound when played live. But until I figured out my studio made my amp and my basses sound dead, I was ready to buy new basses and equipment!
How long have you owned your amp and cabinets? It takes awhile to get used to the character of your amps and cabs. Also, having owned a Hartke V-series cabinet (a 2x15 cab), I know that although they are a decent cabinet for an affordable price, they aren't built with high-end plywood, and speakers. This doesn't mean I'm knocking your 4x10's; I just want you to understand that all cabinets have voicing characteristics that need to be taken into account when deciding how to EQ your bass or amp, and what kind of strings will work with your bass and amp combination. No one said good sound would be easy, and if you've read enough bass forum threads, you know we're all on that continuous path to great tone.
I hope you take what we've all said into consideration, and eliminate the variables one-by-one until you get the even-ness through the strings you're looking for. Let us know how it all turns out!
Good luck,
Ian