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

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

Duke, that makes sense. Thanks.

If you have large full range speakers that go down to the mid 30s, if you add subs, you need larger ones that deliver output below that range in that there is little to gain to start with otherwise and you don’t want to merely add to the frequencies already there.

Get 2 Rel’s