A:
Thanks for your question. The Freespace 51 speakers are rated for use with a receiver which outputs between 10-100 Watts Per Channel, 4-8 Ohms. Either one or two pairs of Freespace 51 speakers should work well with your receiver without causing any damage.
The speakers can certainly be connected to a receiver with a maximum output of 135 watts per channel. You would just want to be careful not to turn the volume up too loud (past 50 - 60%) and overdrive the speakers (this is where the speakers could be damaged).
If you have any further questions, please contact our technical support team who can assist. They can be reached at 1-800-380-4831 and are available 8:30am-10:00pm M-F, 9am-7:00pm Sat EST. Thank you.