You are correct. But I wanted to lower the voltage to allow me to swap to other op-amps. The Bursons are a Max 17v and tend to run a bit hot at that number. Now I can try any op-amp on the market without worry of overvoltage. Before the mod the amp ran on the warm side. I know this is due to its class-a topology, but I still wanted it a bit cooler. This led me to install the case fan, which dropped temps dramatically. After I lowered the voltage the amp runs much cooler and negates the purpose of the fan. But I already installed it so now it's gonna stay put.