Subwoofer Calibration W Behringer Feedback Destroyer DSP1124p

[prerich]

Originally Posted by Kali157

Thanks GAWD. I figured the MIDI cable could be any cable, but I just wanted to be sure.

In terms of RCA to 1/4 converters, the HT Shack instructions warned that people should get high quality converters OR even better, an RCA to 1/4 cable. They said that the Radio Shack version is of inferior quality. Where did you get your converter? I really want a high quality RCA to 1/4 cable... that is cheap, but I can't find any.

I was actually surprised that there isn't even a thread for this topic. This is considering sub woofers is the most difficult to properly place and calibrate. This route seems like the cheapest way to equalize your sub. I want to do this b/c I have a limited space in my room and a very limited number of options for placement (my new sub is huge). I know the spot I am using for my sub is probably not the VERY best position, but it is the best position of my available spots. I am hoping using an equalizer can make it even better and compensate for my compromises in positioning.

I'm using the Behringer DCX2496 for bass management and PEQ, it also has a variety of crossover slopes ranging from 6db to 48db. There are a few others that are doing this because I've seen a few DEQ2496,1124's, and DCX2496's in the gallery section. They just don't talk about it as much as they do at the HT Shack.

[GAWD]

Originally Posted by Kali157

Where did you get your converter? I really want a high quality RCA to 1/4 cable... that is cheap, but I can't find any.

I just used some my buddy had left over from his recording gigging days. My ears are not precise enough to notice a difference if my measurements were taken with HQ converters or run of the mill converters :-) Too many years of drumming but I can say it sounds freaking AWESOME!!!

[kareface]

I can assure you the 1/4 to RCA off monoprice will work fine.

[Kali157]

Originally Posted by prerich

I'm using the Behringer DCX2496 for bass management and PEQ, it also has a variety of crossover slopes ranging from 6db to 48db. There are a few others that are doing this because I've seen a few DEQ2496,1124's, and DCX2496's in the gallery section. They just don't talk about it as much as they do at the HT Shack.

Only after I started researching bass management did I start noticing that there are a good number of people who have PEQs on their HT racks. I also find it interesting that the sub forum is littered w/ people upgrading subs, building risers, and spending tons of money to get better bass. Yet based on what I have read, if the differences a PEQ can make to a sub (or subs) that people say are true, I am surprised that this topic isn't discussed and explored more. I mean it is pretty cheap if you have a computer (mine is about $130 for PEQ and cables).

[Kali157]

Originally Posted by kareface

I can assure you the 1/4 to RCA off monoprice will work fine.

they don't have one. cable or adapter. Unless I missed it.

[Kali157]

Took part of the day off to read the posts and instructions and any info I can get my hands on about calibrating subs... Well my head is spinning... I think I do not need to read into all the in depth scientific explanations.

It seams a bit intimidating at this point. But I know once I run the tests a few times, I will get the hang of it.

[cdanielski]

I'm wondering if someone could measure the width of their 1124, without the rack ears (just the body of the unit)? I read it was 19" wide which means its larger than my cabinet, but I thought that dimension might be with ears. I've got 18" available. Thanks in advance!

[Big Daddy]

I merged the two threads on REW & Behringer 1124 Feedback Destroyer and added more information and links to post #1.

[kareface]

BD, anyway to crop the end of the Velodyne thread to the end of this one? It'll be a little chopped up but I'm sure people will put 1 & 1 together.

[Big Daddy]

Originally Posted by kareface

BD, anyway to crop the end of the Velodyne thread to the end of this one? It'll be a little chopped up but I'm sure people will put 1 & 1 together.

I can do that. Give me some time.

[kareface]

Cool, I felt bad constantly hijacking your thread, lol.

[Kali157]

Due to work, I did not have an opportunity to calibrate my new Outlaw sub until a few days ago. I have been playing around w/ REW and the Behringer, and I have to say, correcting a sub is VERY interesting. Besides cost, my curiosity and penchant for tinkering are my other reasons for going the Behringer route.

I did have some questions. First, I initially followed HTShack's advice of running the REW w/ Audyssey off and then run the AVR calibration after the sub filers are added. But when I ran REW after all this, the results were worse than before I ran Audyssey. So I reset everything, ran Audessey, and then ran REW. I got a much flatter response. Is there something wrong w/ my process (besides contradicting HTSHack)?

I posted my before an after correction graphs, but these readings were done AFTER Audyssey calibration. My next concerns are the dips at 24 Hz and 100 Hz. Any way to correct those (besides relocating the sub)? I am particularly concerned w/ the 100hz one since that should be when my speakers should be playing.

Any other thoughts for improvement would be greatly appreciated. Thanks everyone.

[Kali157]

Originally Posted by cdanielski

I'm wondering if someone could measure the width of their 1124, without the rack ears (just the body of the unit)? I read it was 19" wide which means its larger than my cabinet, but I thought that dimension might be with ears. I've got 18" available. Thanks in advance!

I didn't see this till now. W/out the "ears," it is slightly under 17 inches.

[prerich]

Originally Posted by kareface

Cool, I felt bad constantly hijacking your thread, lol.

Update....As many of you know I upgraded my subs recently (Wharfedale SW-380'S) - and some of you know that I added a DCX2496, well I wanted the DCX to handle X-Over duties and I wanted a few more filters - so I added a FBD2496 to the mix and WOW!!!!! While I'm off I'm going to do some computer graphs to compare against my manual hand ones, but my ears are not lying - I'm hearing bass notes and feeling bass that I didn't before...even at low listening levels. I heard details and layers that I didn't before - this is just amazing!!!!

I almost went for a SMS-1 but I lost the auction - so I decided to get in there and wrestle with the DCX/FBD combo and I'm glad I did! My wife even noticed it during the Sorcerer's Apprentice. She told me that these new subs kill my old ones - but I didn't have them dialed in like I have these. It's wonderful when your wife can apprecieate your hobby!!!!

[Iad]

I have a question:

My measurements show a down peak from 40 to 50 hz. If i lower the Target Level from 75 to 60 it flattens the response drastically. How big of an impact on subwofer perfomance comes with reducing Target Level DB?