Hi... First off, I'd use the rear pickup (near bridge) to get a more precise sound.
Then just try some distortion pedals.
I got a Boss MetalZone, modified, which I like, and a MXR M80, which is excellent, because it's a DI box plus distortion, including an efficient denoiser.
There are pedals which sound good when you play at soft volume, and vice versa.
Some, like Blacky, achieved their sound by overdriving Marshall guitar amps, best at very loud volumes I guess.
But Eric's tone seems like just shredding distortion you'll only get by using pedals.
But the best shredding and powerful bass sound, according to me, is achieved thru 2 amps: one clean, for a good fundament, and a distorted second one.
If you only use distortion, there's danger the sound gets muddy and lacks of bottom end power.
Again, with the MXR M80 pedal I've discovered a fantastic tool, because you got two channels in this thing; distorted (with or without denoiser) or clean or both blended as you like.
I can really recommend this thing; you only need one amp then, and get a ripping sound.
Keep it up......
cheers, S.
PS: I did an embarrassingly bad quality video I uploaded on YouTube (probably because of some xmas depression) where I try to play "Experiment" (Dimension Hatröss) by our mighty VoiVod. That song changed my life. Maybe I'll have to re-record it, shitty cam etc., but you may get some slight impression of that pedal (MXR M80) I use. I only distorted a bit on this one though.
http://www.youtube.com/watch?v=gzSRKQKDk4k&feature=channel_page
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