Other Parts Discussed in Thread: LME49721, LM4818
Tool/software:
Hi!
I designed a circuit to drive a speaker(32Ω) using the OPA1671. The simulation result looks good, with a 150mV input signal and output about 1.8V. However, in actual testing, the output can only reach around 800mV (using a variable resistor to adjust the amplification factor with RF). But if I change the speaker to a 1k ohm load, the output can reach around 1.8V . Could this be due to the speaker impedance being too low?
best regards
DAVID