BTN - Ballantyne Strong Inc 2021 Q1 - Results - Earnings Call Presentation May, 07 2021 12:31 PM Ballantyne Strong Inc. The following slide deck was published by Ballantyne Strong, Inc in conjunction with their 2021 Q1 earnings call. For further details see: Ballantyne Strong, Inc 2021 Q1 - Results - Earnings Call Presentation