hi folks, i have a 4-track (tascam porta02) which i use with a SM58 mic. i mix down through a line in to my computer (standard soundcard, nothing fancy). I record mainly acoustic guitar (mic'ed, not with a pick-up as i don't like the sound) and quiet vocals. This set-up has been great to learn on, but the levels are generally quite low and if i try to boost the volume/levels (once they're in the computer) i just get distortion in some places. i'm guessing that i probably need to use a preamp at some point in the process, or possibly a mixer with preamps. i don't know anything about preamps, or where they are best placed, or which one is a good one for my set up. can someone please advise? i like my 4-track, and i won't ditch it so that i can record straight into my soundcard (as i have been advised to do by other people!). I just want to get the best sound i can from the equipment i have. thanks for your help. p.s. one more thing - the Porta02 has no EQ, which i'm starting to find a little limiting.