This should be easy, but it seems that it's not. I am using my Topping DX7s to directly feed my 2 channel system amp when the HPs are not plugged into the front. All is well. I'm wanting to plug an Elac Debut S10EQ subwoofer in for a bit of low end-fill, but I have no mono outputs, and the sub only accepts a single line-level input.
There is a lot of ignorant chatter on the teh interwebz about this, and some good stuff too, but I need illumination from those that are more technically adept on how BEST to approach this. I am certainly capable of DIYing a few resistors to a Y-cable or making a summing adapter box, but given the output impedance of the DX7s and the worry of this causing substantial crosstalk, I'm not sure if this is really the best option.
Given the rated output impedance of the DX7s to coax is 100 ohms (unbalanced) and referencing the linked schematics, what would be the best resistance values to use to ensure that the summing function does not create unacceptable crosstalk in the signals to the amp?
Also, there has been mention of inverting one channel on some forums, which actually does not make sense to me, as it seems that would cause cancellation issues.
Finally, if anyone knows of a competent and inexpensive solution for sale somewhere, I'd be grateful for that info also.
-edit-
corrected impedance values
There is a lot of ignorant chatter on the teh interwebz about this, and some good stuff too, but I need illumination from those that are more technically adept on how BEST to approach this. I am certainly capable of DIYing a few resistors to a Y-cable or making a summing adapter box, but given the output impedance of the DX7s and the worry of this causing substantial crosstalk, I'm not sure if this is really the best option.
Given the rated output impedance of the DX7s to coax is 100 ohms (unbalanced) and referencing the linked schematics, what would be the best resistance values to use to ensure that the summing function does not create unacceptable crosstalk in the signals to the amp?
Also, there has been mention of inverting one channel on some forums, which actually does not make sense to me, as it seems that would cause cancellation issues.
Finally, if anyone knows of a competent and inexpensive solution for sale somewhere, I'd be grateful for that info also.
-edit-
corrected impedance values
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