Best get rid of them as soon as you can. As an engineer these terrible measurements should be quite easy to understand. THD + N a mere 30 dB down in the mid range is appalling (my speakers THD+N are -70 dB SPL which is a target you should at least aim for within your budget constraints).
http://www.soundstagenetwork.com/measurements/speakers/monitor_audio_pl100/
Speakers are the most important part of your setup - even with astronomical expenditures on the speakers and your audio room - the room and speakers will likely remain the weakest link in any setup.