Subwoofer connectivity question

Hi
Ok, I am trying to think.I am not familiar with the lightspeed unit but it's probably a passive preamp. What is your source? Your source is connected with RCA so you buy and use a Y RCA connector to split the signal,assuming you buy a powered sub . Signal would be going to the sub AND your setup at the same time.Powered subs have besides other controls also a volume control build in .Another option would be to use the speaker connections of your Primaluna ,some subs come with speaker connections but I prefer the Y RCA splitter myself.
Best

George

The input impedance of the line-level inputs of most subs is too low to be optimal when driven by a passive preamp such as the Lightspeed. Also, if the sub is not located close to the Lightspeed the capacitance of the interconnect cables that would be involved stands a good chance of being too high to be properly driven by the Lightspeed.

Splitting the output signal of the DAC, as was suggested, is probably a non-starter because you would have to adjust the volume controls of both the Lightspeed and the sub in sync, every time you want to change volume.

My suggestion is that you choose a sub having speaker level inputs, and use those.

Regards,
-- Al

If you use a Y connector you will be running your speakers full range. I have always used a sub going out from preamp to line in on sub then line out on sub to line in on amp. When you do it that way your speakers are not running full range which is what you want to do!