This seems like a nice little Powered PA speaker, but in reality, it has some issues with a 142Hz base peak.
A speaker charaterization i did, using an XR18 with a ECM8000 measurrement microphone, using Room EQ wizard, revealed the that this speaker has a large boost (+10dB) at 142Hz,
This bass boost is so noticble, that for it to be leveled out, the speakers Bass EQ knob, has to be turned all the way down, but since this also eleminates other low/middle tone frequencies, this makes the sound profile of the speaker wrong.
The speaker is usable for making music background noise, but i would not recommend it for use as Monitor, or for Vocal (song) PA use.