How would I add a subwoofer out this dac if the sub doesn’t have XLR. Can I use two of these Benchmark cables?
https://benchmarkmedia.com/collecti...dapter-cable-pin-3-floating?variant=547761981
Yes,,, and you also have two other options which work always simultaneously.
Option-1:
We can use nice haedphone out (CH1+CH2) of DAC8PRO and DAC8 Stereo for RCA unbalanced input into amplifiers, if you really would like to do so using stereo TSR to RCA adaptor like
XCaliber's DAP XGA-18.
One nice feature of this route is that the headphone out (CH1+CH2) is also under the volume/Gain control of DAC8's preamp functions. I use this RCA unbalanced headphone out (CH1+CH2) of my DAC8PRO into L and R active sub-woofers (capable of both RCA line level and speaker level inputs) as shown
here.
Option-2:
If you have another DAC capable of AES/EBU digital input and RCA unbalanced output,,,
DAC8PRO and DAC8 Stereo has one AES/EBU digital out of "CH1+CH2 through digital out". You may connect this into another DAC capable of AES/EBU digital input like ONKYO DAC-1000. In this case, DAC8PRO and DAC-1000 are fully "in sync" since AES/EBU signal contains the "sync clock info" for DAC-1000; DAC-1000 does not use its internal clock but it uses the AES/EBU signal for synchronization. You may use DAC-1000's RCA unbalanced output into sub-woofers or amplifiers.
I fully confirmed this with my DAC8PRO and I can use this route, as shared in
my specific post.
Please note that the AES/EBU digital out of DAC8PRO and ADC8 Stereo is the "Through digital of CH1+CH2" which is
not under the control of DAC8's preamp functions including the Volume and Gain controllers. In case we can control the "Master Volume" in upstream before DAC8,
i.e. by JRiver's or Roon's or Digital Crossover Software's Volume controller, we would have no problem in Master Volume control. This is the case with my system using JRiver or Roon. Or you may apply "Volume Control" in downstream at active sub-woofer with volume control.
Consequently, in
my multichannel multi-amplifier project using DAC8PRO, the L & R sub-woofers are now fed by either of
Option-1 and
Oprion-2, as shared
here.