Trying to get REW figured out

[Wayne A. Pflughaupt]

KristiSwallow wrote:

If I'm understanding that thread properly, my upper bass is coming in louder than my lower bass so I want to cut it out completely. Is this correct?

Not cut it out completely, just reduce it so that it’s more in keeping with the Target. An outboard crossover connected between the receiver and subwoofer (preferably in front of the BFD) would easily accomplish this. However, you could also do it with the BFD, by applying very broad and deeply cut filters centered somewhere above say, 250 Hz.

Are the above graphs showing before or after EQ?

Regards,
Wayne

[KristiSwallow]

Wayne A. Pflughaupt wrote:

Not cut it out completely, just reduce it so that it’s more in keeping with the target line. An outboard crossover connected between the receiver and subwoofer (preferably in front of the BFD) would accomplish this. However, you could also do it with the BFD by applying very broad filters and deeply cut filters centered somewhere above say, 250 Hz.

Are the above graphs showing before or after EQ?

All the graphs are before EQ. Hope to have time to setup the filters on the BFD soon!

[Bent]

Kristi, the output that you are measuring at frequencies above 80 hz seems funny (funny, in that they are even there - let alone measurable.)
Do you know if your crossover frequencies on your Yamaha AVR are correctly selected? (is your YPAO - or whatever Yamaha calls their automatic room equalization system turned off?)

The AVR should be sending minimal levels - if any at all, above 80 hz (assuming you chose 80 hz as your initial crossover) to the '1500, so it looks to me like you might either have the AVR sending these frequencies to the BFD, or the room is contributing with sympathetic resonances (are you doing your test sweeps at a high relative level and making the house "shake"), or another possibility - your measurement equipment might be a bit off.

did you do these previous sweeps with your mains connected?

an outboard crossover between the receiver and the BFD will only show a change if the sweeps you've already posted don't include the outputs from the main speakers.

Either way, it looks like the deep bass is starting to shape up. I hope you are enjoying this and not finding it too tedious.

[KristiSwallow]

KristiSwallow wrote:

All the graphs are before EQ. Hope to have time to setup the filters on the BFD soon!

Bent wrote:

Kristi, the output that you are measuring at frequencies above 80 hz seems funny (funny, in that they are even there - let alone measurable.)
Do you know if your crossover frequencies on your Yamaha AVR are correctly selected? (is your YPAO - or whatever Yamaha calls their automatic room equalization system turned off?)

The Crossover is set at 80, but I did use YPAO to setup the speakers. I'm not sure how to turn this off... when I do the measurements I set it to 2-channel stereo. I tried the pure-direct settings but this turns off the sub.

Bent wrote:

The AVR should be sending minimal levels - if any at all, above 80 hz (assuming you chose 80 hz as your initial crossover) to the '1500, so it looks to me like you might either have the AVR sending these frequencies to the BFD, or the room is contributing with sympathetic resonances (are you doing your test sweeps at a high relative level and making the house "shake"), or another possibility - your measurement equipment might be a bit off.

did you do these previous sweeps with your mains connected?

an outboard crossover between the receiver and the BFD will only show a change if the sweeps you've already posted don't include the outputs from the main speakers.

Either way, it looks like the deep bass is starting to shape up. I hope you are enjoying this and not finding it too tedious.

In order to get the input level high enough to do a measurement in REW, I have to set the Sub level on the receiver to + 10 and the sweep in REW to +3. My measurements are with the main speakers disconnected.

[Bent]

Any luck?

[KristiSwallow]

haven't had a chance to look at it yet probably this weekend.