Ummm REMOTE IN connection on stereo receiver / IR Extender

Ok, I'm feeling like a dunce. I've got a 3.5 mm REMOTE IN jack on the back of my peachtree amplifier, so I thought I could buy one of the low cost IR extender cords and plug it in, to get better remote control access. (The amplifier sits in a closed cabinet otherwise and blocks the IR remote).  But apparently not, or at least the cable I bought doesn't have the required frequency.  I'm being told two separate things that don't make sense. One person said I needed a powered IR receiver that then has an emitter for the IR sensor on the amp (if so ... why the hell is there a REMOTE IN), the other said I must just have the wrong cable and need to know frequency matched information.

This thing has got to be just a photodiode. Is it really this convoluted?
A ir repeater is generally powered by a 12v wall wart

Also you may be using an Ir emitter when you need an ir receiver contact us we can help

Dave and troy
Audio intellect Nj

Some devices can take control input of the DC pulse train that would drive an emitter . . . On a system with an IR repeater and emitters, you can typically drive devices such as yours directly with no emitter/receiver optics . . .