First Attempt at EQ

Well, after playing around with REW for a few weeks...I finally got a hold of BFD.

I took a measurement of the SUB only...then of the SUB using the EQ filters suggested by REW...then of the EQed SUB w/ RIGHT MAIN.

This is what I got.

Sub Only:


Sub EQed using 2 filters suggested by REW:


with Mains:



I thought I was doing ok...but then the measurement with mains kinda thru me...the plot beyond 155ish HZ looks messed up?

I tried adjusting sub phase and speaker distance and that is the best I could get.


Thoughts? I am still not entirely sure about the accuracy of my measurement...I have a hard time getting the same result twice...

[jerome]

rafaelsmith wrote:

Well, after playing around with REW for a few weeks...I finally got a hold of BFD.

I took a measurement of the SUB only...then of the SUB using the EQ filters suggested by REW...then of the EQed SUB w/ RIGHT MAIN.

This is what I got.

I think that your sub measurements look ok. Maybe a few dBs too low?
What kind of sub do you own?

Could you post a measurement done with your main only?
What is your crossover frequency and why did you choose the one you have now? (I'm not saying that it's incorrect )

rafaelsmith wrote:

Thoughts? I am still not entirely sure about the accuracy of my measurement...I have a hard time getting the same result twice...

What do you mean? What kind of differences do you get? It's important that you get some results that you can reproduce ...

jerome wrote:

I think that your sub measurements look ok. Maybe a few dBs too low?
What kind of sub do you own?

Could you post a measurement done with your main only?
What is your crossover frequency and why did you choose the one you have now? (I'm not saying that it's incorrect )



What do you mean? What kind of differences do you get? It's important that you get some results that you can reproduce ...

Its a HSU STF2. The mains are older Klipsch KSF 10.5 Towers.

Mains (Klipsch KSF 10.5)
36Hz-20kHz±3dB
sensitivity 95dB @ 1watt/1meter

Center (Klipsch KSF C5)
63Hz-20kHz±3dB
sensitivity 96dB @ 1watt/1meter

Surrounds (Klipsch Synergy S1)
95Hz - 23kHz +/-3dB
sensitivity 88.5dB @ 2.83 volts/1 meter

XO is at 80hz. My receiver (HK 247) allows me to set a different XO for mains, center, rears...then the SUB is set to match one of those.. I picked 80 because thats what most of the guides suggested. Mains, Center and Surround are currently all the same @ 80 and the SUB is set to Surrounds....So 80hz across the board.

As for getting different results...the problem I have is something happens which seems to screw up REW and/or the Cal files...All the sudden I get crazy looking graphs, clip warnings, or too-low warnings..."peak not where it should be" warnings. I do a reset of REW...go thru the setup/cal again and all is good...until it starts acting up again.

I thought the DBs were too low as well...but everything...AVR volume, SUB level, REW controls are such that using Check levels I get ~75 on the SPL and around -18-20db on the check level reading.

My room layout is pretty bad.




I will try to get a MAIN only reading tonight.