I want to do a RC bandpass filter can I use low-pass or high-pass at the beginning or does it have a specific sequence? First low-pass then high-pass, or first high-pass then low-pass?
If you need a bandwidth of B=440-220=220 Hz the center frequency will be app. at Fo=311 Hz. As a consequence, the required quality factor of your bandpass will be Q=311/220=1.4
Please note that it is NOT possible to realize a bandpass with such a selectivity based on the mentioned approach (lowpass-highpass series, or vice versa).
Therefore, you either need a RLC bandpass configuration or an active RC bandpass topology.
If you put the low blocking stage first, your first capacitor will be very close to zero impedance to the higher frequency signal being cut off by your high blocking capacitor.
If you put your high blocking stage first, your high blocking will be close enough to high impedance to at low frequencies to have little effect.
At the point where they start interfering with each other, you are trying to create too narrow a band with a simple RC circuit and will need to look at LC stages or active filters.
First stage should be a low pass filter with the cuttoff frequency of 440Hz.So this low pass filter allows frequencies in the range 0 to 440Hz.
Second stage is high pass filter with the cuttoff frequency of 220Hz. So this high pass filter allows frequencies in the range 220Hz to 440Hz.(Since the maximum frequency allowed by the first stage is 440Hz).
I like this question, If it's just an RC's with no buffer/ opamp in between, then you need to think about the impedances. You'd like the low impedance in front.