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You can't have a limiter on a headphone amp that will work the same with all IEM's ... it would have to be calibrated for a known sensitivity of model IEM at a known impedance.
But I think you can use the P2 in stereo too, but you need a 2into1 cable. It talks about that here http://silentsky.net/wordpress/archives/930 Is this right? Jeezo, IEMs are tricky for the inexperienced.
You can. As well as requiring the appropriate cable
there is also a mono / stereo switch hidden away inside. It’s easy enough to access the switch, you
just slide the cover off as you would do to change the battery, but it can be a
bugger to locate.