Sub Question. One higher quality sub or two lesser quality? (Rythmik vs HSU)

@mapman asked: 

"One question I have is how are people connecting multiple subs to their two channel systems not necessarily designed to output to multiple subwoofers out of the box in a manner that maintains proper load?"  

I can't speak for others, but the Swarm and DEBRA systems use four passive subs which are normally driven by a single amplifier, and optionally by two amplifiers.   

The amplifier has line-level inputs, and if that won't do, then a voltage divider network can be built to derive a line-level signal from a speaker-level output, with the line-level signal then feeding the subwoofer amp.  

The amp we use is the Dayton Audio SA-1000. 

Duke

Mapman wrote:  

"As I read it the two outputs are already in parallel and connecting two subs to each directly would result in 4 in parallel which would could result in loads 2 ohms or less with nominal 8 ohm subs. Two in series to each would seem like a better idea?" 

Sorry I didn't go into detail.  

With one amp and four 4-ohm subs, the connection configuration is series/parallel, resulting in a 4 ohm load.  

With two amps there are several possibilities, but we never ask the amps to drive a load they're not rated for. 

Duke