[Xcakez]

I have dual pb2000s and I grabbed a umik mic to take a few measurements and I noticed there was about a 10 or so decibel dip from around 40hz-100hz I moved the subs all over the room but no matter where I placed them the dip was always there is that just my room gain and would a mini dsp 2x4 be able to level it all out with out killing all my bass

 

[Ed Mullen]

I can't open your thumbnail. But based on what I can see - it's not a dip from 40-100 Hz - it's room gain starting below 40 Hz. I'm thinking this is a fairly small room to start showing gain at 40 Hz.

If you want to eliminate the room gain for a flatter and more accurate FR from the subwoofers, use an AVR which EQs the subwoofer channel - like Denon or Marantz using Audyssey MultEQ XT or XT32.

You might be able to eliminate it with the miniDSP also - it depends on what types of filters they have available.

 

[nodoubt]

I can't open your thumbnail. But based on what I can see - it's not a dip from 40-100 Hz - it's room gain starting below 40 Hz. I'm thinking this is a fairly small room to start showing gain at 40 Hz.

If you want to eliminate the room gain for a flatter and more accurate FR from the subwoofers, use an AVR which EQs the subwoofer channel - like Denon or Marantz using Audyssey MultEQ XT or XT32.

You might be able to eliminate it with the miniDSP also - it depends on what types of filters they have available.

yep, id say cut it

 

[MKtheater]

What? Cut free bass, that is nuts.

 

[Xcakez]

I can't open your thumbnail. But based on what I can see - it's not a dip from 40-100 Hz - it's room gain starting below 40 Hz. I'm thinking this is a fairly small room to start showing gain at 40 Hz.

If you want to eliminate the room gain for a flatter and more accurate FR from the subwoofers, use an AVR which EQs the subwoofer channel - like Denon or Marantz using Audyssey MultEQ XT or XT32.

You might be able to eliminate it with the miniDSP also - it depends on what types of filters they have available.

The room is 2400 cubic ft open to a bedroom and stairs leading to my upstairs behind it I moved the subs around a bit more and was able to get the curve way flatter as well messing with the variable phase settings but I lost about 7dbs across the entire range does that mean I should turn the subs up a bit more to gain some of those lost dbs back it was showing 101dbs at refrence volume or is that all the subs can put out

 

[Ed Mullen]

The room is 2400 cubic ft open to a bedroom and stairs leading to my upstairs behind it I moved the subs around a bit more and was able to get the curve way flatter as well messing with the variable phase settings but I lost about 7dbs across the entire range does that mean I should turn the subs up a bit more to gain some of those lost dbs back it was showing 101dbs at refrence volume or is that all the subs can put out

I would have to see the REW files for the individual subs and then the combined FRs to make an assessment. You can send them to [email protected] if you want me to take a closer look or post them here. But the earlier thumbnail wouldn't open for some reason.

The max output of the subwoofer is dictated by the strength of the input signal from the source. Even though the AVR was set to 'reference level' (which would be 82 dB or 0 dB depending on the volume scale) - that doesn't necessarily mean the upstream signal source being sent to the AVR input has the equivalent of a 0 dBFS encoding level (most likely it is far below that).

 

[Xcakez]

The room is 2400 cubic ft open to a bedroom and stairs leading to my upstairs behind it I moved the subs around a bit more and was able to get the curve way flatter as well messing with the variable phase settings but I lost about 7dbs across the entire range does that mean I should turn the subs up a bit more to gain some of those lost dbs back it was showing 101dbs at refrence volume or is that all the subs can put out

I would have to see the REW files for the individual subs and then the combined FRs to make an assessment. You can send them to [email protected] if you want me to take a closer look or post them here. But the earlier thumbnail wouldn't open for some reason.

The max output of the subwoofer is dictated by the strength of the input signal from the source. Even though the AVR was set to 'reference level' (which would be 82 dB or 0 dB depending on the volume scale) - that doesn't necessarily mean the upstream signal source being sent to the AVR input has the equivalent of a 0 dBFS encoding level (most likely it is far below that).

I only have the rew file for both combined I gave the mic back to my buddy but I re uploaded the picture hopefully this works

 

[Alan P]

^^^

Looks like an outstanding response to me!