The No.1 Website for Pro Audio
Major null at 250hz + other issues
Old 20th July 2016
Here for the gear

Major null at 250hz + other issues

I have a two-channel/theater listening room that is ~13'9" by 20'8" by 9'9". On the front wall/ceiling interface, I have ~20"x13" of fiberglass insulation. On each of the side walls, I have a pair of 2' x 4' 4" thick absorptive panels. I also have a couple 2" panels near the rear of room (still have some flutter echo issues).

I wasn't really digging the sound I was getting, but couldn't put my finger on it, although I know that it didn't sound quite as "alive" as I knew it should.

I measured the room last night (XTZ room analyzer pro). I am not sure what more I can do with the deep nulls at 40-50 (short of adding some subwoofers), but am far more concerned with the null at 250. If my math is right, it looks like it could be floor bounce interference. There is also a somewhat smaller peak at 500. Thoughts?

I am thinking of a tuned bass trap for the peak at 80ish.

I also am a bit concerned by the loss of high frequencies. I am wondering if I should cover the fiberglass in the front corner and/or replace some of the absorption with diffusion?

ANy thoughts on the effects of putting a lot of diffusion on front or rear wall?
Attached Thumbnails
Major null at 250hz + other issues-quinta_to-250.jpg   Major null at 250hz + other issues-quinta_fullrange.jpg  

Last edited by shaynet98; 20th July 2016 at 01:30 PM.. Reason: added attachments
Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.

Slide to join now Processing…
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Forum Jump
Forum Jump