Amplifier feedback - local vs. global
CH Precision provides its amplifiers with the ability to modify the ratio between their local and global feedback.
This in essence provides a way to control the amplifier damping factor (the quotient of the load impedance and the amplifier output impedance), allowing to fine-tune the amplifier with the connected loudspeakers. For loudspeakers where each drivers can be driven separately, finer tuning can be achieved as the feedback ratio can be independently adjusted on each driver.
All CH amplifiers provide an adjustable global versus local feedback ratio, from full local to full global, in 10% (or 20%) adjustment steps.