Background <p>Mechanical metamaterials incorporating dynamic vibration absorbers (DVAs) have emerged as a powerful strategy for flexural vibration mitigation, yet active systems require external energy to sustain tuned states, causing thermal instabilities, environmental sensitivity, and high operational costs, while passive systems are limited to discrete, manually adjusted tuning with narrow ranges, gaps addressed by the research presented in this paper.</p> Objective <p>This study introduces a novel metamaterial platform with reconfigurable DVAs to enable broad, continuous, energy-independent post-tuning of flexural band gaps.</p> Methods <p>The vibration attenuation performance of the proposed metamaterial is investigated using the Spectral Element Method (SEM) and Finite Element Method (FEM), and further validated experimentally using a fabricated prototype. The study shows that by actively reconfiguring DVA positions, high tunability comparable to active systems using piezoelectric or magnetorheological elastomer materials can be achieved while stably maintaining the tuned bandgap without external energy, as in passive systems.</p> Results <p>The three analytical approaches show good agreement with each other and qualitatively with experiments, revealing a maximum tuning ratio of 1.57 in the center frequency of the flexural band gaps. This tuning ratio surpasses state-of-the-art reconfigurable passive DVAs, which typically have tuning ratios below one octave, while the proposed DVAs can be reconfigured via an external actuator without manual adjustment. To our knowledge, this is a rare DVA design combining active-like performance with passive energy efficiency.</p> Conclusions <p>This work demonstrates a metamaterial design enabling flexible, energy-independent control of flexural vibrations, providing a practical strategy to combine high tunability with stable, passive-like energy efficiency in engineered structures.</p>