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powered sub to an Adcom speaker selector box

I have an Adcom 5400 amp with a Adcom GTP 350 preamp . The amp is connected to an Adcom 3 speaker selector. I also have a Kilpsch  R-100SW as my subwoofer. Can I hook the subwoofer directly to the speaker box like a regular speaker and turn the low pass to around 80hz.  The other two sets of speaker are 901s. I can't find it anywhere but it seems as feasible as wiring the subwoofer in line with one of the speakers as many do. The speaker selector is passive.
cunawabi
elliottbnewcombjr
5,500 posts
 
IF you go line level to sub, as yogi said

after you split your preamp output into two left and two right, using the fitting he posted, or a pair of Y adapters

https://www.amazon.com/LEIGESAUDIO-Female-Adapter-Splitter-Connector/dp/B07P45DT6K/ref=sr_1_2_sspa?d...

you need to convert one l/r to mono for the sub

https://www.amazon.com/FosPower-Subwoofer-Splitter-Connectors-Extension/dp/B01LZVLBY3/ref=pd_rhf_se_...
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cleeds
5,960 posts
 
elliottbnewcombjr
IF you go line level to sub, as yogi said after you split your preamp output into two left and two right, using the fitting he posted, or a pair of Y adapters ... you need to convert one l/r to mono for the sub ...
That is not going to work with most preamplifiers, which typically  have their outputs wired in parallel. If you convert one set of outputs to mono, you'll have converted all of the outputs to mono.

 
yogiboy's avatar
yogiboy
5,711 posts
 
That subwoofer has left and right inputs. There is no reason to hook it up any other way from what I showed him for his non home theater preamp!!
https://www.klipsch.com/products/r-100sw-subwoofer
elliottbnewcombjr
5,500 posts
 
thank you both for clarifications
cunawabi OP
5 posts
 
Got the adapter plugs on the way.
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