After calibrating my setup, what does my MMM look like?

[Keith_W]

I was wondering why I should have to turn down the amps for the midrange/tweeter, shouldn't they have the same gain? Despite the jump up at 700Hz which is the crossover frequency? I went ahead and matched the levels, then reduced the low shelf filter and got rid of the high shelf filter. I think it sounds better this way.

If the MMM is almost flat at the listening position, it will be upward tilting under anechoic conditions. Go download a target curve (from the same Google Drive you got the eBook), let's say Harman, then overlay it with your MMM to compare. That will explain what you are hearing.

 

[olds1959special]

I started over again, using my interface instead of external transformer-coupled pre-amp. These are my latest measurements. I got the lowest bass up. Now it looks like I get bass down to 12 Hz.

 

[olds1959special]

My settings:

amp levels:

woofer volume:

midrange/tweeter volume:

top subs

bottom subs

miniDSP volume (controls subs)

SMSL DAC volume (controls mains)

SoundSource EQ settings (controls multi-output device)

Crossover and EQ settings for subs:

 

[olds1959special]

Why do boosts in EQ often sound bad? I had to get rid of the boost at 10 Hz and 100 Hz to get it to sound better. Anything that goes above 0dB.

 

[ernestcarl]

Why do boosts in EQ often sound bad? I had to get rid of the boost at 10 Hz and 100 Hz to get it to sound better. Anything that goes above 0dB.

Apart from increased speaker distortion, there's very likely increased resonances in the room as well -- it may not immediately be obvious at the MLP with just the measurements, but elsewhere around the room it's going to be audible. I've performed low frequency tone burst tests of my speakers and listened while moving around the room and I've found resonances from inside the dry wall and venting system at particular spots -- as well as other objects e.g. stands and areas near the speakers -- so really not the speaker itself.