speakerless

adjective3

1. •
   Without speakers (audio equipment).
2. •
   Without a speaker (narrator).

   • ...for myth is a speakerless instance of language. It is a system that always speaks itself... — 1984
3. •
   Without a speaker (orator).

   • One distraught party chairman from Brazil, Maryland, faced with the prospect of a speakerless rally, prayed, "FOR GOD'S SAKE SEND US INGERSOLL,"... — 1978