div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: 7521 color - AE Techron · 2016 2 28 · The 7521 is a single-channel amplifier with selectable controlled voltage or controlled current output via a front panel toggle switch src=https:reader035vdocumentsmxreader035viewer2022071502612175581013ce417445c9aehtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: 7521 color - AE Techron · 2016 2 28 · The 7521 is a single-channel amplifier with selectable controlled voltage or controlled current output via a front panel toggle switch src=https:reader035vdocumentsmxreader035viewer2022071502612175581013ce417445c9aehtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv