you'll have to recompute for the bands...also your circuit seems to be so complicated, using too many op-amps...to have a better output just cascade a high pass and low pass filter and you'll adjust them to your prescribed frequency...just remember that your 5th band should attain a 1kHz frequency...
Like I said on the other website, you need simple Multiple-Feedback-Bandpass filters, not a highpass filter followed by a lowpass filter, millions of buffer opamps and two opamps without any negative feedback.