Question about adding an Amp / bi-amping speakers

[Hoser59]

Originally Posted by arrt vandelay

only problem is, how is the amp going to get the signal from your str-dg720? that model does not have any pre-outs for an external amplifier. the only way it is going to send a signal to your fronts is through its binding posts...

if you're really serious about adding an external amp, you need to update the receiver to a model that has pre-outs...

This is the part I was most confused about. I had read some about pre-outs but I wasn't entirely sure what thier function was. My receiver does have one set out audio outputs (2 line RCA), what is the purpose of these? I had assumed (incorrectly I suppose) that I could just plug these into the amp to pass the audio through

[arrt vandelay]

Originally Posted by Hoser59

This is the part I was most confused about. I had read some about pre-outs but I wasn't entirely sure what thier function was. My receiver does have one set out audio outputs (2 line RCA), what is the purpose of these? I had assumed (incorrectly I suppose) that I could just plug these into the amp to pass the audio through

without looking at the back of the 720, i'm not sure i can tell you what those RCA's would be for, but i used to have an 820 and unfortunately...no pre-outs...

a pre-out will take the signal of a designated channel(let's use l/r for this example) and instead of sending it to the receiver's internal amplifier for ouput to the speakers, it will send it to an external amplifier. in this case, the l/r binding posts on your receiver will not be receiving any signal, so there is nothing to ouput, their amps have been bypassed. you would connect your speakers to the external amp's binding posts since it is actually receiving the signal...