Speaker Dimple

I've used the vacuum method. Worked pretty well, but there's still a very
slight imperfection.

I read just recently that one speaker manufacture suggests using a hair dryer
at low setting (I think it was Von Schweikert). Apparently, the new VS driver
domes are made of a material that restores its shape when heated.

Not sure if a silk dome would respond in the same manner.

BTW, I've swapped the speakers left and right (and back again) to listen for
any discernible effect to the sound caused by the dimple, and I could not
detect any.

Use a guard of some type or rest your arm against the face of the speaker, hold the vacuum nozzle firmly in both hands and gently move the nozzle toward the dome. Don't get too close or you are going to have difficulty controlling the nozzle

I read about that method in Dr Comfort's "Joy of Audio" - never tried it though ;-)

With the vacuum use the bypass opening usually on the wand to regulate a lower amount of force.

The biggest problem with the dimples is that they affect dispersion and subsequently imaging.

If you listen to a single speaker at once, you may not be able to detect any difference- as the actual driver is behind the dome. However, if you listen in stereo you will find things to sound erratic and imaging to suffer.

Good luck

...if you listen in stereo you will find things to sound erratic and imaging to suffer.

Robr45 (System | Reviews | Threads | Answers)

Not true in my system. Imaging is spot-on.

Guess either my speaker didn't have an appreciable defect, or I have poor listening skills. Could be either...or both.