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Given:- two sources: one with balanced output (XLR connectors), and one single ended (RCA connectors),
- and a headphone amp that you intend to connect with an RCA cable to either of the two tape outputs of the pre-amp,
is it possible to configure connections such that you can then listen to either source through the headphones without having to change cable connections?
Using a RCA/XLR adaptor and connecting the single ended source to one of the inputs of the pre-amp does not allow for this. Rather, such a configuration requires switching between the two tape outs to switch sources.
Follow Ups:
Rupe,Ok, I've read over your question a few times, and I think I get the gist of it.. and I think I have a solution. Your comment that using RCA-XLR adapter doesn't work, and requires switching tape-outs seems to be a red herring. Some background is needed.
The tape outs on an Atma-Sphere MP-3 are actually the same tape out - since the MP-3 is balanced, the 'two' tape outs are in fact the noninverted and inverted phases of the same signal, appearing on two different RCA jacks.
If you install a standard RCA-XLR adapter to the MP-3's XLR input, the adapter will connect pin 3 (inverted phase) to pin 1 (ground). This will effectively kill any output coming from the "inverted" tape out.
If you are listening to the headphone amp on the noninverted tape out, you should be able to toggle between a true XLR balanced input, and one derived from an RCA-XLR adapter without any problem. Note that you will have to use the RCA-XLR adapter for this; the RCA inputs on the preamp do not have connections to the tape outs.
Hope that helps.
n.t.
Ralph's a tape-recordist, and I am sure he can answer your question, plus it is likely that he can solve your problem.
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