“The Lajnah Daa’imah was asked the following question,
س: هل إقامة الصلاة جهراً أم سراً عندما يصلي منفرداً؟
When a person is praying alone, should the iqamah be made with a loud voice or a low voice?
جـ: المشروع في الإقامة أن تكون جهراً فمن أقام للصلاة فليجهر بها سواء كان منفرداً أم غير منفرد.
What is legislated for the iqamah is that it be with a loud voice. Therefore, whoever performs the iqamah for the salaat, should raise his voice with it whether he is praying alone or not.” End quote.
Note: He raises voice his but not as he would raise his voice for the adhaan. However, with a lower tone.
AbdulFattaah Bin Uthman