MR5MK3 + SUB-1200 + MiniDSP

This is currently my bedroom combo. I crossed the speakers and the sub at 100 Hz. I could have gone much lower, and was experimenting crossing at around 50 and 70 Hz. It works either way, but crossing at 100 Hz makes life much easier for the speakers when things get cranked up.

The amount of equalization needed for the speakers and sub was fairly minimal. here are the combined responses (1/12 octave smoothing):



Response seems to drop around after around 30 something Hz, but there is still usable stuff around 25 Hz. It is possible to equalize and bring things up there manually, but I did not feel the need to do so subjectively. Blips throughout the bass area lower mids depend on mic placement in the room. Main corrections took place around 70 Hz, where the room seems to have a resonance.

These are in-room measurements after corrections, which again were fairly minimal.

I can later measure the subwoofer full frequency response on it's own. Results are also mic placement dependent.

 

Here are some distortion plots:

Left:



Furniture and crap vibrate a bit as the measurement tone sweep goes through, and this may show up in the distortion measurements.

The right channel was not taken with enough averaging, but here they are:

Right:



Here is a compare of the responses w and w/o the sub (equalization not optimized for the no-sub cases). Speakers are run full range w/o 100 Hz crossover high-pass filter:



And these are the distortion plots of the speakers w/o sub help:

Left:


Right:


Which shows that the MR5Mk3s really only extend down to around 45 or so Hz (as per their specifications). Distortion is around 100% bellow 45 Hz, and struggle around this area.

This may be generally true for most speakers with around 5" woofer drivers.