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streaming with benchmark2-dx DAC - problem - no signal to preamp

I am trying to stream from a newly purchased Benchmark2dx DAC via usb, using the benchmark usb cable connected to an Apple USB3 camera adapter, which is connected to a new ipad.  The camera adapter is also connected to a wall charger.  There is signal to the DAC's headphone outputs, but no signal to the Anthem preamp. 

The DAC is connected to the preamp's dvd intput. The disc player plays fine on that intput through the DAC. 

I called Benchmark tech support.  They were helpful, but we could not identify the problem.  I expect I am missing a basic setting, any help appreciated.
jminock

Showing 4 responses by djones51

djones51
4,947 posts
 
Does the Benchmark work with a CD player or something besides the iPad? 
djones51
4,947 posts
 
What are you trying to play from the iPad stored music or a stream service like Tidal? You can hear music through headphones but not through the preamp/ amp? 
djones51
4,947 posts
 
Have you tried using different analog outputs? I notice it has 3 outputs XLR main  RCA main and RCA aux. Seems strange it does the same thing with 2 different DACs have you tried a different preamp or bypassing the preamp and connecting to an amp using the volume on the DAC? 
djones51
4,947 posts
 
Seems strange it does the same thing with two different DACs and the headphones work. The signal is getting to the DAC and the headphone amp works, CD players work the only thing I can think of is some kind of software incapatability sending the signal from iPad to dac  to the preamp. Have you tried connecting a laptop to the DAC USB input ?
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