www.zenproaudio.com/

Great product and great service!

Great price & Zen Pro Mod opened up the original sound.

Fast shipping and exactly as described

It's a Xmas gift so it hasn't been used yet but the customer service has been amazing!!

I believe I have every plugin brand of SSL style bus compression (as well as almost all other styles). I usually go with Cytomic Glue as it's the most flexible and I like the sound the best. The SB4001 has very similar flexibility (slightly different as the SB4001 has additional attack times, variable release and Grind mode while the Glue has sidechain HPF sweepable to 2k) but a much more solid and 3D sound. The sweetspot is much bigger, I can go soft or I can push it much harder and get where I want much quicker, just easier and more fun to experiment. I couldn't be happier with the purchase and to top it off Warren is a pleasure to deal with. If you have a 500 series rack it's a no brainer.