possible problem with Adam Sub 7
Old 16th December 2012
  #1
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possible problem with Adam Sub 7

Hello.

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

Roby
Old 28th December 2012
  #2
How are you liking your Adam A7x in general for post sound?

Nicole
Old 30th December 2012
  #3
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
  #4
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Quote:
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
  #5
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Update:

Adam Sub12: fantastic.... great Sub Bass, no distortions, no rattling, great volume and clarity.... I wish i got it earlier :-))
Old 23rd January 2013
  #6
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Good to know. Thanks for the info.
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