10 Replies Latest reply: Aug 8, 2011 2:42 PM by jimfitzgerald RSS

    RCA audio out

    tdenson

      I am feeding a video source with sound into the RCA inputs on my Slingbox Solo. I want to be able to monitor the sound coming in by plugging headphones into the output, but there doesn't seem to be any signal coming out. What is meant to be the nature of this output ?

        • Re: RCA audio out
          dbsguy Apprentice

          The outputs of the slingbox are preamp outputs which are required to be amplified to be heard. In other words, the signal comming out of the outputs is meant to be ran into a TV or other amplified devic in order to be used.

            • Re: RCA audio out
              tdenson

              That's a shame, I was hoping it was more of a pass thru type setup. The input is strong enough to drive headphones and I rather assumed the output would be a similar level.

                • Re: RCA audio out
                  dbsguy Apprentice

                  Any video sources rca audio plug outputs will be the same as they are all "pre-amp" sources designed to be amplified by the end device (ie tv or a/v stereo).

                   

                  The slingbox's outputs ARE passthru in nature. 

                    • Re: RCA audio out
                      tdenson

                      dbsguy wrote:

                       

                      Any video sources rca audio plug outputs will be the same

                       

                      I have to disagree. I have an HDPVR video capture box from Hauppauge, and it has RCA in and RCA out, and the output is headphone level. That was the basis on which I was expecting the same to happen with the Slingbox.

                        • Re: RCA audio out
                          dbsguy Apprentice

                          Specs and engineering 101.....

                           

                          Line Out/Line Level/Fixed Output

                           

                          The signal out of line out remains at a constant level, regardless of the current setting of the volume control. You can connect recording equipment to line out and record the signal, without having to listen to it through the device's speaker, and without the loudness of the recording changing if you change the volume control setting of the device while you are recording.

                          The impedance is around 100 Ω, the voltage can reach 2 volts peak-to-peak with levels referenced to -10 dBV (300 mV) at 10 kΩ, and frequency response of most modern equipment is advertised as 20 Hz - 20 000 Hz (although other factors influence frequency response).[citation needed] This impedance level is much higher than the usual 4 - 8 Ω of a speaker or 32 Ω of headphones, such that a speaker connected to line out essentially short circuits the op-amp. Even if the impedances would match, yielding the theoretical maximum power transfer of 50%, the power supplied through line out is not enough to drive a speaker.

                           

                           

                          Not that I would know anything since I sell, install and repair electronics for a living.... 

                  • Re: RCA audio out
                    tdenson

                    You're just trying to blind me with science now (although I do have a doctorate in computer hardware engineering).

                    All I know is that the Hauppauge does what I want and the Slingbox doesn't.

                      • Re: RCA audio out
                        jimfitzgerald Apprentice

                        Go to Radio Shack and buy a small amp.

                          • Re: RCA audio out
                            tdenson

                            jimfitzgerald wrote:

                             

                            Go to Radio Shack and buy a small amp.

                            That could be difficult as I live in the UK

                             

                            Yes, I realise how to fix it and I already have line amps I could use, however it's just further complicating what is already a rather complicated configuration needing yet another PSU. Just saying .....

                              • Re: RCA audio out
                                jimfitzgerald Apprentice

                                It can't be that complicated to plug a small amp into the Slingbox audio output.

                                  • Re: RCA audio out
                                    tdenson

                                    jimfitzgerald wrote:

                                     

                                    It can't be that complicated to plug a small amp into the Slingbox audio output.

                                    I know, but it's just it's the audio visual setup for a church, and there is rather limited space in the Sounddesk. I already have about 20 small PSU's for various bits of kit and multiway mains blocks daisychained together. It's just the last straw and I was hoping to avoid yet another box and power outlet but c'est la vie. I won't in fact do it that way, I will split the audio before it arrives at the Slingbox and then use one of the splitter outputs to drive the headphones.