I am using the OPA551 for the purpose of getting an output current in the range of 50-100 mA with a load of 15 or 30 Ohms. My input is a max of +/-10V. With my specifications, the output voltage comes out to be close to 1.5V. The applications information in the datasheet doesn't specify any info about how to achieve the above objective with low noise. The supply is +/-15V.