4 Channel Audio Mixer, 99 DSP Sound Board Console with 48V Phantom Power, Professional DJ Mixer for Podcasting, Streaming, Studio Recording (SMX4)

As pointed out by u/Elderban69 you risk damaging the speakers. For a good experience I recommend a mixer that has reverb/DSP which doesn't come with many inexpensive mixers. Although something like this should work well enough https://www.amazon.com/Professional-Channel-Console-Streaming-Recording/dp/B0F93SCWN6?th=1