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Subwoofers that do both L/R & LFE simultaneously?

Running a 2 chan/HT combo. I understand the REL subs allow you to connect both the stereo high level inputs and an LFE cable and the unit apparently senses the signal. You send the sub a full range signal. Any others do this? My Para s8's don't really need help on 2 chan, but it makes sense to me to use a REL type setup with the sub crossover at around 30. That way I get a little fill-in as needed. Am I missing something, why aren't all subs done this way. Thanks, this forum is great!
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warrenh's avatar
warrenh
2,299 posts
 
I'm not really sure about your question, but in subwooferdom two is better than one. Never heard negative experiences with two rather than one sub. This guarantees you a balanced stereo bass. I used one sub for years 'til I switched to two, from Audiogon suggestions. I was released. As was my system. peace, warren
patternlou
16 posts
 
Not sure why all subs do not work this way, but suspect it is a cost issue. The speaker level inputs on REL go into a switch selectable filter. Purpose is to fine tune the integration of speakers and room with the sub. It is not really a crossover, as the filter has no effect on what is sent to you main L/R speakers. And then the REL sub mixes LFE and speaker level.

In any case, it works well!
jvogt
212 posts
 
With REL subs, the speaker (high-level) input is the
PREFERRED method. It integrates better than with
low level signal inputs.

I have two REL Strata III subs which I use with both my
home theater system (low level input) and with my two
channel stereo system (high level input). They are
excellent and integrate seamlessly with my Magnepan
speakers.
nsgarch's avatar
nsgarch
2,524 posts
 
Just my opinion of course, but adding two more (mechanical) electrical connections and another pair of speaker cables between my amp and my main speakers just doesn't say "high end audio" to me. It's OK for a modest HT system, but at best a compromised result for 2-channel audio.
nrenter's avatar
nrenter
765 posts
 
Nsgarch,

Then you misunderstand how a REL is connected at speaker-level.

With the REL, the sub is connected in parallel with the main speakers. It presents such a high impedence (100K Ohms, I believe) that it doesn't significantly affect the impedence "seen" by the amplifer. The speakers and the sub are both connected to the speaker terminals on the amp.
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