No pictures?
Look here, maybe what you need is just basics.
How to Connect a Subwoofer to a Receiver, Processor or Amplifier
Hi Johncee. Normally, you would run the main speaker full range or cut off the lower frequencies with a crossover or a high pass filter. A device that only lets frequencies above about 100 hz get through the mains. That gets any muddy low sounds that can potentially damage your speakers from getting through. The subwoofer on the other hand needs a low pass filter (crossover) to allow only the low sounds to get through. You will need an amp that has a crossover built in to it or a separate crossover to at least 2 amp channels. One for lows, one for highs. Unless you're running stereo, then you need to double everything. Hope this helps.
My experience with subs is... not using subs. 
I don't know what your mains are.
You said in the other thread that you have:
Rotel RC1070 (pre-amp)
Audio Research S10HO (sub)
A friend of mine uses the sub for HT only not for stereo.
Usually (how it started) the sub was to substitute the two main speakers when they were to small (no woofers) and to play earthquake type info in cinemas.
I don't see any interest in using subs if the two main speakers are good (quality and LF extension). This has to do with a few aspects related with the quality of the equipment in general, speaker drivers, quality/amps type, dual/stereo for mains, position in room and nulls/disturbances. Is just my general opinion, that I can change at will or for different cases/necessities.
AR (Acoustic Research) S10HO
It is equipped with an input terminal of the two types of low-level and high level.
It is equipped with auto-sensing capability and variable adjustment of the crossover frequency and input level.
Crossover frequency 50Hz ~ 200Hz (continuously variable)
I don't know what your mains are.
You said in the other thread that you have:
Rotel RC1070 (pre-amp)
Audio Research S10HO (sub)
A friend of mine uses the sub for HT only not for stereo.
Usually (how it started) the sub was to substitute the two main speakers when they were to small (no woofers) and to play earthquake type info in cinemas.
I don't see any interest in using subs if the two main speakers are good (quality and LF extension). This has to do with a few aspects related with the quality of the equipment in general, speaker drivers, quality/amps type, dual/stereo for mains, position in room and nulls/disturbances. Is just my general opinion, that I can change at will or for different cases/necessities.
AR (Acoustic Research) S10HO
It is equipped with an input terminal of the two types of low-level and high level.
It is equipped with auto-sensing capability and variable adjustment of the crossover frequency and input level.
Crossover frequency 50Hz ~ 200Hz (continuously variable)
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My experience with subs is... not using subs.
...Is just my general opinion, that I can change at will or for different cases/necessities.
Have you heard the best or the most expensive sub? I have not. And I'm very curious if it is possible to create sub that works.
With commercial sub, we usually set the matching between sub and main woofer by ears. This is difficult. Not everyone has the tools, skill and trained ears. But if we develop our own speaker, we know better.
We can use delay network, we can use the best circuit that we know. I think it is the room that can be a problem, but may be, may be an EQ can solve a bit.
What I REALLY REALLY want to know is, what scheme is used by the most successful, or the most expensive sub over there! Anyone please show me something
Thanks Wayne. What I meant was a "scheme", something that I can follow to build similar sub. I haven't searched the Danley but it seems a commercial product. I will check if they expose the technical details of the amp/crossover and speaker design.
ADD: Just finished reading the website. Eww!
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