Is this TL072 stereo opamp circuit functional? Can it be used for LM833 too?
Regarding the topology, it remains all the same, since TL072 and LM833 have equal (standard) pinout.

Looking at datasheets (TL072, LM833) the main differences I've found between them are:


Input impedance: TL072 has JFET input which means it has a considerable high input impedance, which means, again, it shouldn't load significantly previous stage (IN R/L). LM833 is BJT technology, which means it can load the previous stage but considering it is designed for audio applications I wouldn't see this would be something to care much, assuming you're working with audio frequencies.
Slew rate: TL072: 13 V/μs    LM833: 7 V/μs. If you were working at high frequencies (radio for instance) this would be a factor to consider, but for audio this wouldn't mean any appreciable drawback.
TL072 has less power dissipation capacity than LM833 (&lt;100mW vs 500mW), but if it only will be used as a preamp (stage before power stage, or in other words, you won't draw significant current out of out pin), this should work fine.


I've used both kind of OpAmps to compare performance in audio frequencies and the differences are minimal. Also JFET input opamps tends to be a little more expensive.

Components values should not vary unless you're pretending to get some kind of exceptionally exact frequency and gain response. C1 and C2 seems to be there to only allow get some gain on frequencies above zero, and block any DC gain in the circuit, just a way to preserve the internal DC biasing of the OpAmps.

\$Gain = 1+\frac{Z_f}{R_1+X_c} = 1+\frac{R_2}{R_1 - \frac{j}{\omega C}}\$

At DC (\$\omega = 0\$), the denominator of the fraction tends to infinity, then fraction tends to zero and therefore, gain keeps stuck in 1.







simulate this circuit &ndash; Schematic created using CircuitLab