can i power more than 1 of this circuit with the same power supply

[JohnForeman]

A non-pedal tech question:
I want to build 4 of these:
http://www.redcircuits.com/Page119.htm
to use as a home studio headphone monitoring system as was wondering if i could power them with the same power supple.  Since i know nothing about design and only build, i wanted to ask the pro's.  At first, i thought it should work but now i'm not so sure.
thanks

[GGBB]

Shouldn't be a problem as long as the power supply can deliver enough current for all 4 units. According to their specs, the max draw appears to be 17mA each, so 4 times that is 68mA. Give yourself some breathing room and go to at least 100mA.

[JohnForeman]

Shouldn't be a problem as long as the power supply can deliver enough current for all 4 units. According to their specs, the max draw appears to be 17mA each, so 4 times that is 68mA. Give yourself some breathing room and go to at least 100mA.

So i wont have a problem with cross talk between the amps?  Each one will have it's own mix coming from the mixer.

[GGBB]

I doubt it, but I'm not an expert. How you build it - specifically how you design the grounds and lay out the circuit - has an impact.