possible problem with Adam Sub 7
Old 16th December 2012
Gear Head
RobyM's Avatar

Thread Starter
possible problem with Adam Sub 7


This is my first post, i hope it's in the right place :-)

i calibrated my room for 79spl for surround sound 5.1 (i own 5 adam a7x). since the first day i noticed that if i pushed a bit the bass on LFE, it would rattle (distorting/buzzing), but i thought it was probably me trying to overdo the bass. But then i started playing film sound mixes from dubbing stages and DVDs and i noticed that the LFE was really louder than what i was trying to achieve and the rattling sound was almost constant.
At -20dbv with sinus wave between 40 and 85hz it sounds fine, but below that, the rattling sound is constant. is it broken or it can't handle those frequencies?
Every movie i listen to has that rattling sound when the LFE is used a bit more. i get the rattling sound from a film sound mix between 30 and 120hz with peaks of -9db at 31hz (measured with Waves Paz analyser) and it stops if i insert a hipass filter of 48db/oct at 52hz...i honestly am bit confused.

thanks for your help

Old 28th December 2012
How are you liking your Adam A7x in general for post sound?

Old 30th December 2012
Lives for gear

The A7 sub is not at all enough to handle proper LFE in a 5.1 setting (77-85dBC). You need a bigger better sub.
Old 4th January 2013
Gear Head
RobyM's Avatar

Thread Starter
Originally Posted by ErikG View Post
The A7 sub is not at all enough to handle proper LFE in a 5.1 setting (77-85dBC). You need a bigger better sub.
yep, you are right, i just did not want to admit i got the wrong speaker...

i ordered adam sub12
that one should do

regarding adam a7x, they are alright and i checked my mixes in a pro-dubbing stage (they mixed Troy and many other Movies over there) and apart from the LFE content (now i know why) dialogue and everything else translated incredibly well... EQ-wise and level-wise. The head engineer who checked my mixes with me was impressed with what i achieved in a room not even half the size of that dub-stage...

big up for A7x...
Old 23rd January 2013
Gear Head
RobyM's Avatar

Thread Starter

Adam Sub12: fantastic.... great Sub Bass, no distortions, no rattling, great volume and clarity.... I wish i got it earlier :-))
Old 23rd January 2013
Lives for gear
Airon's Avatar

Good to know. Thanks for the info.
Post Reply

Welcome to Gearslutz Pro Audio Forum!

Registration benefits include:
  • Ability to make and reply to posts
  • 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 lifetime access to the world's best private pro audio Classifieds for only USD $20
  • List your eBay auctions 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
Similar Threads
Thread Starter / Forum
Arthgs / Rap + Hip Hop engineering & production
Empire 21 Music / Low End Theory
imaverysoundman / High end
seaneldon / Geekslutz forum

Forum Jump
Register FAQ Search Today's Posts Mark Forums Read Search