the isa 428 is a 4 channel mic pre with the option of 8 channels of 192 kHz a/d converters on the back end and a plethora of other nice options (like instrument inputs, insert points and impedance matching) so you can connect it directly to protools (or any type of digital output option for that matter)

here is a link to the product info Robbie

the red 1 is just a straight up 4 channel mic pre. A very good 4 channel mic pre mind you

Wow I just checked out your website, I hope you lay some knowledge on our asses!

Chris

whenever I can 8-)