Full Marty 21 - Weird sound running REW sweeps

vingeance

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Preamp, Processor or Receiver
X3800H
Front Speakers
HTD Level Three
Center Channel Speaker
HTD Level Three
Surround Speakers
Fluance Signature HiFi
Subwoofers
Full Marty 21
UPDATE: Fixed! Driver screws were not tighten enough.

Hello,

I got a UMIK-1 and ran my first REW sweeps to measure the response of my Full Marty sub at different locations.

I am hearing a strange noise when running the sweeps with the Full Marty sub. I don't hear that noise running the same measurement with a PB1000.

Does anyone know what I could do to investigate the issue?

Here is a link to a video where you can hear the sound.
 
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AudiocRaver

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Onkyo TX-SR705 Receiver
Main Amp
Crown XLS 1502 DriveCore-2 (x2 as monoblock)
Additional Amp
Behringer A500 Reference Power Amplifier
Front Speakers
MartinLogan Electromotion ESL Electrostatic (x2)
Center Channel Speaker
Phantom Center
Surround Speakers
NSM Audio Model 5 2-Way (x2)
Subwoofers
JBL ES150P Powered Subwoofer (x2)
Sounds like a grille rattling.
 
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