Hooked up Shiit Mani incorrectly


I feel really stupid right now. I hooked up my Shiit Mani to my phono input on my Adcom GFA 555 preamp causing both my speakers to start distorting. Once I realized my mistake I shut the system down. I believe I may have damaged both my amps in the process.  Both amps are humming when turned on. What damage could of done? Any guidance would be greatly appreciated 

horsestuff
horsestuff OP  No guarantees, but amps generally have fairly robust input circuits since they are designed to work with variable volume. They might have survived the onslaught. It's definitely a good sign that the hum is absent with no input source.

@horsestuff 

Interested in your follow up.  Sounds like all the individual components are working OK?  Have you put your system back together to try it out?

According to Schiit no damage should of occured to the amplifiers possibly the speakers could sustain damage if the volume is set high which it wasn't around the 8 O'clock position . Also, he wrote that damage to the preamp was unlikely and should contact the preamp manufactures for more info. Not happening since they are no longer in business. With that being said I will hook everything back up and power up the system to see what happens. Hopefully I will be spared any damage.