Don't do it, you run a risk of shorting and damaging the receiver. You don't want to be doing any experiments with the most valuable piece of audio equipment that you have, especially since you just invested your money into it.
I did that once with a receiver I spent over $200 on. I blew up two channels on it by making a simple mistake with some wiring. When a driver fails from being over-driven it can easily become highly resistive which may short and damage capacitors, transistors, and diodes (anything in the output signal path from the receiver) and repairs would be beyond your technical know how and having them done elsewhere would be costly.
If you're going to do experiments with junk, do it with junk. You wouldn't hitch a Rolls Royce to an old trailer to see if you could move it would you?
