Quote:
I would expect to provide a different output module with XLR connections if there was a demand. Keeping the unbalanced output module inexpensive is a priority.
Is there a similar situation for source signals on XLR? I assumed most dolby decoder type boxes would be unbalanced.
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I don't know what you mean by dolby decoder type boxes.
The unit has to be able to accept both unbalanced and balanced inputs to the two channels. The input to the device will be fed line level signals from home theater processors, receivers, preamps that have low output impedance (usually less than 100 ohms). The device has to have high input impedance that accepts a switchable range of levels since there are two quasi standards in the industry (-10dBV and +4dBu).
The balanced connections can be TRS or XLR and the unbalanced RCA type.
The output of the device (low output impedance) will be feeding subwoofers with their own amplifiers, or DIY subwoofers with external amplifiers (high input impedance devices). Some of these devices accept balanced and some unbalanced. Again the levels usually conform to one of the two standards.
Here's an
FBQ2496 from Behringer.
You can download its PDF and look at the specs etc.
Here's the type of specs we would be looking for. (except most people would want the unbalanced connection as an RCA rather than an auto detect TS jack..
FBQ2496.jpg
brucek