Action Gear via Amazon offers the Arion Legacy 2.0 Self-Powered Speakers, model no. ET-AR604H-BR, for $89.99 with free shipping. (Altatac via Rakuten has them for the same price.) That's the lowest total price we could find by $40. They feature a frequency response of 60Hz to 20kHz, 80 watts RMS power handling, and volume, treble, and bass controls.