I think the reason the rumble filter doesn’t stop it is that it’s DC with a slow rise time. The o-scope looks hilarious.
So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2
I observed the weirdest thing I have ever seen in audio. With the cartridge positioned above the record, tone arm locked up and platter spinning, the woofers were pumping on my system. I googled every permutation of query I could think of but came back with no hits. That’s when I decided to video the problem- link below:
I could type out all the details but the video pretty much covers everything. I thought ya’ll might be interested in this.
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- 167 posts total
Kudos to @dadawada |
Show me or describe the wave form. You could be describing a square wave, which is complex AC. DC seen on a scope is a flat line with respect to time. The vertical position of that line will depend upon magnitude. DC into your woofer might burn up the voice coil but won’t move the diaphragm. Whatever the source is that’s moving your woofer it is an AC signal doing the work.. |
- 167 posts total