vocals in digital audio

you only need one preamp in the chain - it brings mic level up to line level. So if you run one mic preamp into another, the 2nd one will most likely overload since the input is so hot.

Something else, not all XLRs are mic inputs - they are for balanced signals, which mic level is.

So, if you are running your eureka via digital into the Delta digital, you should be fine. IF you don't like the sound you are getting from the eureka, I'd zero out every other component in it (it is a channel strip, right?). Zero out the EQ and take the compressor out and see how you like your signal coming right from the preamp into the Delta. Two less things to worry about setting, that way. I use Presonus, tho not that piece, and the preamps are fine, if a little weak. I think the Eureka may have more output, but any way the signal should be nice and clean.

Very broad - I don't understand. Typically with vocal I roll off (via EQ) some of the bass to get rid of low frequency noise. Another thing - if you are using cardiod mic you might be putting it too close and hearing too much bass to begin with - the proximity effect.

So, check out your mic and placement. Once you get that sorted out, then start EQing and compressing, but only if the signal needs it. Use the KISS principle - not the band but "keep it simple, stupid." Don't think you need to slather reverb on everything (rookie mistake that I still have to force myself to do), or comp it or EQ. If the siganl sounds good don't mess with it - try to only add fx if it helps the sound fit into the song, not just because you can.

hope this helps,

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