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Pre-amp out splitter won't power subwoofers? it does power DSP unit.

Any thoughts are appreciated. I'm using a pre-amp output from my STI-1000 integrated, into a DSP room correction unit, and then back into the STI-1000 via HT Bypass inputs.  I have several subs but so far the only method that powers them with a line-level signal is using a Y splitter coming from the DSP unit's analog line level outputs. In this mode I cannot use a high-pass filter on my mains to relieve them of bass 60 and under +/- as it feeds the subs as well.

Using a Y out block connector from the STI-1000 pre-out (male/2 fem) when I run a cable to the DSP it works (and back to STI), but the subs will not work being fed a signal in this mode. There is no discernible cone movement or vibration. It seems strange as the DSP got its 'half' of the Y split's signal. Maybe the sub needs more to even activate?

Coming out of the DSP output works, but it makes the mains play very low frequencies unnecessarily since they take full signal (and want to play low). So, what am I doing wrong here?  I can't quite figure this one yet, but it may be simple enough. Thanks, folks.  

 

 

musicaddict
russ69's avatar
russ69
3,360 posts
 

What sub?

erik_squires
15,948 posts
 

Does your DSP unit have only 1 output per channel?

musicaddict OP
370 posts
 

Running two (chained) SVS SB-2000 from left side (mono, of course) and one SB-3000 off the right channel. (Would like a 4th. Thanks, Erik; I've been reading your sub stuff lately and enjoy it.)

The DSPeaker Anti-Mode 2.0 had L&R analog outputs and balanced which I cannot use. Of course both are signals after DSP processing, room correction, (and/or a high pass to the D2s).

I tried a basic block Y outside the integrated's pre-out, and also right at the DSP's 'analog input' but got no sub signal, not a vibration. Perhaps putting the subs in the 'active' or powered analog output after the DSP provides enough signal to activate the sub's circuitry, not sure one bit. Guesses.

D2's have limited headroom downstairs and would love to relieve some of the burden trying to high pass. Hmm...  Thx.

 

 

russ69's avatar
russ69
3,360 posts
 

I have several subs but so far the only method that powers them with a line-level signal is using a Y splitter coming from the DSP unit's analog line level outputs. In this mode I cannot use a high-pass filter on my mains to relieve them of bass 60 and under +/- as it feeds the subs as well.

That would be my preferred way to do it but if you want to split the lows from the highs, go into the sub, then out of the sub to your mains amp.  

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