Question about Pioneer TV

[HCI]

I have a older Pioneer floor model big screen TV. It has 2 sets of RCA inputs and 1 set of outputs. On on of the inputs it says LD input. If something is plugged into this the picture is fine but the audio is lower. Is this normal or is there something wrong with the input. Also if one side is disconnected all audio is lost, it does not matter which side.

 

[damaged]

Sounds like the outputs share the pre-amp, which means that the available power would be reduced proportionally (+- overhead) when there is more than one device loading the shared pre-amp, hence the lowered volume on both devices.

You could also have a defective component(s) in the device.

 

[HCI]

Sounds like the outputs share the pre-amp, which means that the available power would be reduced proportionally (+- overhead) when there is more than one device loading the shared pre-amp, hence the lowered volume on both devices.
You could also have a defective component(s) in the device.

Makes sense about the preamp. Ive tried all of the components in this output and the same results.

 

[damaged]

In pre-amp setups like that (bipolar), it should also be known that since the circuitry is now having a double load, this effectivly lowers the MTBF for the components carrying the additional load, and increases operating temps, most medium/high end audio output preamps are mosfet driven, which would not suffer the same problems and are more reliable.

There are amplifiers that are used for amplifying long RCA runs which might be of use to you, but the ones I saw were audio/video and were 100 bucks. I know theey have them for car audio, so you could probably use one of those inline.
If the content of the outputs are identical, you would want to put only one of the outputs into the new inline preamp, then from inline preamp, plug into the devices to be driven.
This will reduce the load on the receivers preamp down to the load of one device, and the new amp will 'split' the signal to your devices.

Now, _if_ the 2 outputs content are NOT identical to each other, then you will need 2 preamps for each RCA run, but then you will still be overloading the preamp in this setup, but will have louder volume.