Since the VP150 you have is 1st generation, it will have canceling magnets on the drivers' magnet structures, to neutralize any potential magnetic interference with old CRT (Cathode Ray Tube) TV sets. Magnetic radiation from speakers could be a significant problem back in the days of old tube TV sets. The largest of those sets could even suffer from interference from the earth's magnetic field!
Don't worry about any magnetic radiation from the VP150. Your DVR unit won't be affected.