Measuring a DC offset begins with purchasing a multimeter. The second step is preparing the amplifier and then connecting the multimeter to the amplifier. An offset of 20 to 50mv is higher but preferable. Anything above 50 is dangerous for the speakers.Continue Reading
Buy a multimeter to use for measuring the electrical current, voltage or resistance. Multimeters are available in two models: analog or digital. The best multimeters for measuring DC offset are those of the lowest voltage range.
Disconnect the speakers manually, or take the readings from the remote terminals, and set the speaker control switch. Turn the amplifier's input selector to unused positions. Lower the volume, set the tone to middle position and balance the dial. Turn the amplifier on, and take the readings after 10 minutes.
Set the meter to a range of 200Mv, and plug the test leads into the jacks used to measure the voltage. Connect the black lead to the speaker's negative terminal and the red lead to the speaker's terminal. Hold both leads while checking the reading on the multimeter's face. Take a reading and reconnect the speakers. Reset the controls back to the desired positions and analyze the results of your reading. The best reading is zero, but the range between 0 and 20mV is acceptable.