Since the ART Cleanbox is often recommended to those having low signal level problems with their pro amps, I thought to try it out. For my disappointment, it turned out to be less than adequate for my needs.
Here's its frequency response (measuring system is flat).
As you can see, its FR starts to roll off already at ~200 Hz. Here are some numbers:
Frequency / "Down" at that frequency
100 Hz / -0.4 dB
50 Hz / -1.5 dB
20 Hz / -5.4 dB
10 Hz / -10.3 dB
5 Hz / -15.9 dB
2 Hz / -22.6 dB
So unless your system definitely needs some extra protection down low, or you have too much "room gain", I wouldn't recommend using it. It's like adding an extra ~1st order high pass filter at ~30 Hz.
I also found out that it adds some noise (low S/N ratio) into the system.
My ART Cleanbox is for sale. Anyone?
