Why is it possible to connect the left and right audio outputs of a Panasonic PV-D4744S DVD/VCR Player together through a Y adaptor, with no resistors in line, to the input of a 600 ohm Mackie CR1604-VLZ Mixer and actually get a mixed signal? (essentially each output driving into each other) Shouldn't this cause a catastrophe? But it works! What is the circuit analasyst that explains this? Thank you Ron XXXXXX@XXXXXX.XXX
Hi there happy to help.
By "Y" adapter are you referring to a cable like this........
Let me know,
Yes, that would do. The red a white RCA connectors plug into the output from the DVD/VCR (essentially shorting the two outputs together) and the other (black) connector plugs into an adaptor that converts the RCA into a 1/4 Phono with a tip and sleeve which then plugs into the Mackie mixer's balanced 1/4 phone line input.
Hi, understood. Here's what's going on. These cables aren't shorting the connections. The analog left and right signals still stay separate. They just plug into the Mackie using the different type single 3.5mm or whatever sized plug. If you look at this plug closely you will see black "rings". This is actually the separation of the signals.
I hope this makes sense. Its the same type of theory with a headphone connection. You still retain your left and right audio (stereo) sound, it just connects through the single physical plug.
Hope this helps,
Positive feedback/tips appreciated!
Have a great day
Here's a diagram showing graphically what I explained above........the L/R signals are still electrically isolated, they just reside on the same plug.
I understand what you are saying but I misunderstood the connector that you showed me. This is not the case with the "Y" connector that I'm using. It does not have separating black lines. I've measured with an ohm meter and all three plugs(connecting points) are definitely shorted together. This is not the same as a head phone stereo plug. It is three points that are electrically tied together.
Ok in this case you are simply combining the left and right audio signals to get a single analog mono signal. Not ideal but it is possible, you lose your stereo sound though.Please don't forget to accept and have a great evening.41018.9018329514
You say "not ideal but is possible", but that is my original question - I know it is possible because it is happening. What I asked was HOW IS IT POSSIBLE? I asked for a circuit analasyst, not just an answer that says it is possible. How can one amplifier output look into another amplifier output, each having a very small output impedance (usually in the order of 10 ohms or less. It's practically like looking into an AC coupled short circuit to ground. Wouldn't this load be too demanding on each amp to drive a signal into? Could you drawer me a circuit equivalent of the set up that will allow me to see how the signals a split.
The connection to the mixer is an INPUT not output. So you have two analog signals combining and being input to another device.
You actually said this in your poriginal question. Connecting to the INPUT of the Mackie mixer.
My question is not concerned about the input to the mixer, it is about the two outputs of the left and right amplifiers being tied together. Even if you remove the leg of the "Y" that goes to the mixer which would leave the two amplifiers looking into each other. It seems to me that you can't drive two amplifiers into each other and get a mixed analog signal without them overloading each other. I appreciate your attempts to help me but you don' t seem to be a circuit designer or analyzer.I asked for a detailed circuit analysis explaining this to me. All you have done is restate the conditions that I have observed and said something like " yes, this is what you get in such a set up". Well that is not a detailed analysis. To get an answer I selected the answer with the highest details and you have given me no details.I guess this means I should select the button that says " not satisfied with your expert?" but I wanted to reply first so you might understand. Sorry, I'm sure you are nice person.
I am a circuit designer with over 10 years experience designing some of the largest mixed signal integrated circuits on the market today.
I am simply not clear as to what you are talking about here. I will opt out and let someone else help.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only... Initially, the OUT L & R AUDIO if joined together would not result to a cancellation of their respective outputs. Neither would it result to "overloading" each other.Offhand, factors to consider:
I would like to opt out of this. I could not get the details I was asking for. Today I have a meeting with an engineer friend who will give me the details I'm asking for. Please allow me off the hook without complications. Thanks, XXXXX XXXXXDavid-Mod41019.6600302431