Have an integrated amp with only 1 subwoofer out...

Thank you for the response.  

There is no tape loop in/out.  Just the inputs for the cd, aux, phono, etc.

Question.  If the equalizer has inputs for each component, can I plug the components into the equalizer first, and from the equalizer output, just run one set of RCA cables to one of the inputs on the amp?

First graphic is back of equalizer and second is back of amp.

Sorry.  Graphic did not come up, but I think you get the drift.

Equalizer inputs - dvd, audio, tuner, aux

Equalizer outputs - Rec Out - 2 left and 2 right

Amp inputs - Coax, Aux, Phono

Amp outputs - SW out

Bad idea an analog graphic eq will degrade clarity  digital eq is available through roon 

Why are you adding an equalizer?  That’s just a bandaid for something that is off in your system.  Better to identify the source of the issue and address that rather than inserting another piece of equipment into the signal path.  Look at any reviewer’s system or go to any high-end audio store or audio show and you won’t find an equalizer anywhere, and there’s a very good reason for that.  Do it the right way, not with bandaids.  Just my $0.02 FWIW. 

My humble opinion is quite different.  I have a 6-band equalizer between my CD/SACD player and my integrated amp and use when I play certain discs and its wonderful!

For example, nearly all (all?) early Motown recordings have very little low end and a bit too much high end.  A judicious use of the equalizer makes Tham sound amazing!

So in my opinion/experience, the issue is the recording.  I know of no other way to address this. Do you, @soix ??