From reading the amazon page, it says nothing about the speakers but, since it's in the picture I would assume they are part of the system.
One of the questions at the bottom of the page says it's good for about 15 watts with no distortion ratings, but it should handle your pioneers. It may not blast them but it should provide adequate loudness.
In any case, while this is cute and looks like a vintage Marantz, this is NOT a component receiver. It's a glorified table radio.
You may want to revisit your previous thread. For a few dollars more you can get a real receiver.