New Speakers or subwoofer?

Hello, I have recently gotten a Wiim Amp to connect my TV and record player to, and have been using it enough to warrant at least upgrading it from free.

The speakers I have been using are some old Philips magnavox speakers which are fine enough for what I use it for, which is listening to records and watching movies on my bed, but the bass is lacking.

My budget only allows up to CAD100, so I'm mainly looking used, which makes choosing hard. I have been looking at an Edifier T5 subwoofer for CAD100, is this good enough, or should I look at speakers?