I have pioneer sx 20 tuner/amp and behringer ultragragh pro fbq 1302 graphic equaliser linked together with mono cables via tape i/o rca ports lights on graphic eq lights in sync with sound on sliders but sliders dont alter sound

It is a bit fuzzy for me, how everything is connected, but just plugging in cables where they fit won't always work. Special not with tulip plugs and cables.
Not sure you Amp has speaker switches, but you could start there. NEVER switch on an amplifier, while the volume button is open. Not even when it is half way. Please every time you want to change something, first lower the volume.
First try to get any sound from the amplifier in the speakers. When you have something like noise in the speakers, then you can test an input on the amp. You could put in a pice of wire in and choose the correct input button and then turn up the volume.
If it starts humming, you are on the correct input. On that input you plug in a device giving enough power (voltage must be within the range for that input) and check if it works.
When you want to know anything about voltages going in an amplifier I add a wiki page, and for all other inputs you can find the levels on Wiki too.
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