Move external power supply to internal(API 312 Quad clone)

[hebjam]

I have a 4 channel Reliqua based 312 clone.  It has an external power supply.
  Because only two channels work well i was wondering if i could remove two and move the power supply inside the unit?
Is there an internal unit I could get from JLM that could power 2 or 3 of these cards and be internal?

thanks

 

[radardoug]

You can, but it is likely your units would hum. Not a good idea.