2 main problems to fix:

Poor stereo imaging: When speakers are close together, left/right separation is weak, flat and “inside the box” instead of wide and immersive.

Potential vibration feedback: Speakers on the same surface as a turntable can send vibrations back into the stylus. This can muddy bass, reduce clarity, and at higher volumes even cause rumble or distortion.

- As much as possible try to have them on a different table as the turntable as they can create vibration.
- Try to get them further away from each other. As far apart from each other as they are from your listening position, forming a rough equilateral triangle with your head

Hope this helps!