My PS2 hasn't been in use for a good while, but I will be using it soon with my third rig at a multi-stage festival. Problems
can occur with some mics when you output to an unbalanced feed from the PS2.
I was looking back to an older thread (linked below) before I saw this one and remembered that I wanted to get these:
http://www.bhphotovideo.com/c/product/844682-REG/Energy_Transformation_Systems_PA912_PA912_2_CH_DSLR_AUDIO.html They are coming tomorrow; I will report back after using them.
At outdoor shows without electricity I used to run Samson CO2 mics > PS2 > DR-2d. Frequently I would get some distortion/noise that I couldn't explain. (Some home testing led me to suspect that the recorder was in too close proximity to my battery pack.)
Also, the cable I was using - female xlr to mini - was very long, which may have played into my issues.
I don't recall the run time I would get powering the PS2 with rechargeable 9v batteries, but if you are doing long runs (like an all day festival) I would recommend an external battery pack. I plan to use a Naztech PB1500 to power both the PS2 (with a Gakable) and a DR-2d via a Gakcable (usb out to DR-2d power in.)
http://taperssection.com/index.php?topic=165258.0 update: I've found that constant noise is recorded when running both the PS-2 and recorder (DR-2d) off the same battery. Records fine when I power each with a separate battery.
Not certain if I really need it, but the 2 channel balun cable I linked works well. Although it is pretty heavy duty and not too flexible.