If you are doing a low-noise amplifier you can't just stick 2k2 resistors in the input signal path, the thermal noise from such a large resistance is likely to completely limit the noise performance. IIRC the NE5534A has 4nV/root-Hz so its pretty good - keep input resistors below a few hundred ohms or so to avoid compromising that performance. 4nV/root-Hz is equivalent to 1k resistor noise, adding another 2k2 in circuit will up total noise to about 7nV/root-Hz (3 times the noise power).