Subwoofers for Magnepan 1.7 + Bonus positioning question

@soix   +1

The advantage of stacking them is the physics involved. When done properly you get a +6db increase in output. That's a lot!  This allows for a decrease in gain level and renders lower distortion in the process.

Another stacked option is to set the bottom sub @ a low crossover around 40hz and then set the top sub higher around 70hz. This fills in a wider range of low to mid bass.

Tight, punchy and rich sounding throughout the entire bass region. 

Under no circumstances would I stack the Maggies on top of the subs!!!  And, yes, a "PAIR" of quality subs of your choosing would absolutely take your speaker system over the top.  Not sure if any of the REL subwoofer models offer any phone apps for tweaking, but, even without additional phone app tweaking, and using just the standard adjustments on the back of the subs, I found great success using REL subs with Maggies.  Happy listening.  

When I had I.7s I used a pair of Gallo TR3 (I think). Worked great.

Looks like youll need panel amp sub/subs and  use line out from the H400. With that level of amp maybe go with one very good sub for now and save up for a 2nd.

I paired my 1.7i s with Rythmik 400w 12" sub. Only have one for now, but it compliments the Maggies very well. 1.7i s only go down to 40hz, but their big soundstage with even one sub is impressive.

Rythmik subs have servo drives which they say provides a very tight accurate bass. Panel amps have many setting features, sorry I dont think they have control apps?

They have direct to customer sales from TX. Worth a look.

Oh and ixnay with Maggies on subs!

A small pair of REL subs would be a great match--worked very well for my 1.7's that I owned years ago.

NEVER stack Magnepans on anything--it will alter the sound and imaging in a verry bad way.