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Adding a sub woofer?

Running a Planar 6 to Icon Audio Ps1 Mk2 to Quicksilver Mid Monos into Klipsch RP8000F speakers. Want more low end, thinking of adding a sub. The mono blocks don't have a dedicated sub output so I was thinking about something like a PSB 250 which has both pre amp and speaker level inputs with speaker level outputs. A couple of questions.

What are the pros and cons of using the sub's preamp level inputs vs the speaker level inputs in this application?

And more importantly, right now my setup is pretty much tube analogue the whole way (and aside from the soft low end, I absolutely love the overall sound) - but does an inline sub like this do any processing, will it color the mids and highs in some way or is it just a clean pass-through in terms of sending the signal along to the speakers? 

Thanks for sharing your thoughts. 
Ryan
spotconlon
m-db's avatar
m-db
972 posts
 
Speaker level connectivity was a cleaver method originally designed for those using receivers without preampfification output to enjoy the benefit of lower frequency support.

The pro and con is for you to decide which works and / or sounds best to you.
tablejockey
3,894 posts
 
Trust your own ears.  Get at least 2 subs. Speaker taps to sub-just as REL and  many other manufacturers suggest.
spotconlon OP
13 posts
 
Sorry, what does REL mean?
wolf_garcia
6,695 posts
 
A preamp output can be inconvenient as unless it's truly balanced (into a balanced sub input...sort of rare unless using pro gear) it can require a long run of single ended cable...not so good. Not sure if "many" subs allow for speaker level inputs like REL (I use 2 RELs), but if they do that's great. I use a single ended stereo amp with the REL's high level inputs and it works amazingly well.
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