Why do my 288-8Ks sound like cr@p?

[vuki]

That's acoustically unloaded? And what do they look for? I only have the replacement instruction using the spider shims for centering.

Gpa siad that the jigs/shims are supplied with the new phragms.

Coen

You can even do it by ear - listen for the cleanest tone - with the least amount of harmonics. Of course you can check it with ARTA - on the spectrum analizer look for the smallest amount of harmonics.