After I show you how to EQ Pianos, now is time to learn some tips about how to make the same job for guitars. In the case of a bass guitar, that’s one of the most difficult instruments to EQ, you can add some extra bottom-end boosting between 50 Hz and 80 Hz, but, always remember to boost slightly different frequencies than the ones you are boosting in the kick drum.
Of course, in order to avoid a fight with the sub low from the kick, use a high pass filter at 41 Hz (lowest E on a 4 strings bass). Boosting around 800 Hz will give the bass some clarity, and you can have some snap at around 3 kHz. You may get rid of everything above 5 kHz.
Acoustic guitars can sometimes fight with the bass at around 80 Hz, so if your mix has a bass, it’s probably a good idea to use a high pass filter, which you can use up until 200 Hz without problems. At 240 Hz, is the body of the guitars. This might be a problem when you have an acoustic guitar and an electric guitar playing together. If this is the case, It’s up to you which of them to emphasize and which to attenuate. In most pop/rock cases, I prefer to attenuate the body of the acoustic.
The presence of the acoustic is somewhere between 2 kHz and 5 kHz, so if it’s playing a rhythmical arrangement, it’s a good idea to emphasize that.
As I’ve mentioned before, between 240 Hz and 500 Hz is where electric guitars have their fullness, so, despite being 82 Hz the lowest E in the guitar, you’ll be ok using a high pass to filter below 200 Hz. The presence of the electricity is between 1,5 kHz and 2,5 kHz, but, if you are using a 4×12 cabinet, some extra attenuation at 1 kHz may be needed. If your guitars are fighting with the voice, attenuate a little around 240 Hz just to make some room.
Remember, EQing is the best way to make room for everybody to fit in the mix!