If the amp is not rated to handle 4 Ohm loads, you can always safely connect the speakers in series creating a 16 Ohm load. As long the speakers are similar in design. The power will be shared resulting in lower volume levels though.
I don't think I'd want to connect speakers in series. Their impedance is complex function of frequency, and you will almost certainly get artifacts from the interaction of the speakers.
The amplifiers that were made to drive Apogees did very well into low-Z loads--the Scintillas dropped below 1 ohm, and had a reputation as amplifier killers. Pretty soon there were amps made to drive those loads--Krell, Aragon, I think maybe some of the Mark Levisons, and some of Nelson Pass' designs.
Personally, I'm on some B&W's (C-4 towers)through a Rotel, very nice beginner set up.
To answere the question, YES, but I would suggest you check your amp for matching that load. If not, Russound has some impedance macthing speaker selectors and volume controls that will do the job nicely. (Low grade, no oxygen free copper contacts and whipes...)
Mark Heller "Well - I oughta....." -Jackie Gleason
Re: 8 ohms v. 4 ohm speaker load#66307 05/30/0603:06 AM05/30/0603:06 AM