The primary purpose of this study is to experimentally evaluate the dynamics of a magneto-rheological tuned vibration absorber (MR TVA) with several semi-active control schemes. A test rig is built to represent a two degree of freedom primary structure model coupled with an MR TVA, and four semi-active control policies are considered. The four control policies include: velocity-based, on-off groundhook control (on-off VBG); velocity-based, continuous groundhook control (continuous VBG); displacement-based, on-off groundhook control (on-off DBG); and displacement-based, continuous groundhook control (continuous DBG). Using the test apparatus, a series of tests are conducted to investigate the dynamics of the MR TVA with each control policy. The performance of each of the cases is then evaluated along with an equivalent passive TVA, using a transmissibility analysis. The experimental results indicate that the MR TVA with all of the semi-active control policies outperforms the passive TVA in reducing structural vibrations. Furthermore, the displacement-based groundhook control policies perform better in reducing the resonant vibrations of the primary structure than the velocity-based groundhook control schemes.