Onkyo TX-SR503 Receiver and a 4ohm Polk CSM Center Channel

[asatech]

I have an Onkyo TX-SR503 receiver and a Polk CSM 4ohm center channel speaker. I also have 8ohm Polk R30s as fronts and 8ohm Polk R15s as surrounds and rears. I have a Velodyne DPS-12 sub. I just foudn out today that the Polk CSM is a 4ohm speaker. I ahve had it connected for a couple weeks now and it sounds good. Should I be concerned about it - is there anything I should do? If it is a big enough concern, I will consider selling it and getting an 8ohm Polk center channel speaker.

Please let me know what you think.

 

[MDS]

Onkyo rates their receivers for 6 Ohms. It can handle 4 Ohm speakers if you don't run it at top volume for long periods of time, but with only one 4 Ohm speaker it probably won't have any problems.