Connecting Speakers in Series - Possible to combine Ohm-load to receivers?

[JJ]

I.e., say the Marantz SR-700sreceiver recommends a minimum of a 6 Ohm load for surround/back speakers. If I were to connect two 3-Ohm speakers in series, as such:



Would the Marantz read it as a 6-ohm load, and as thus still be acceptable?

Is there a risk to this? Downsides? Reasons why I shouldn't do it?

Thanks in advance!