What is the ruling on playing a radio broadcast of the Holy Qur'an in the mosque between the Adhan and the Iqamah, with the intention of it being heard by those awaiting the prayer, and is this considered an innovation (bid'ah)?

Playing the radio to listen to the Qur'an between the Adhan and the Iqamah falls under the prohibition of reciting aloud, due to the disturbance it causes to those praying and reciting. This act is considered an innovated bid'ah for which there is no evidence in the Prophetic Sunnah. Scholars of the Permanent Committee for Issuing Fatwas and Sheikh Abdul Aziz bin Baz were asked about the ruling on playing the Qur'an through loudspeakers in the mosque, and they issued a fatwa stating that it is not permissible because it disturbs those praying and reciting. What is prescribed is for those awaiting prayer to occupy themselves with recitation, remembrance, and voluntary prayers silently.

And Allah knows best.