Planar Speaker Asylum

Welcome! Need support, you got it. Or share your ideas and experiences.

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.
You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

RE: 1.7 frame damping

Posted by zulugone on December 24, 2016 at 09:49:48:
Yep, I am intentionally combining everything to do with vibration. My theory is that a little damping in some place will have the most effect and thereafter adding more will proportionally do less good....though there is concrete :).

I had the sock off of a 1.7 and noticed that the frame thins between the outside edge and the Mylar leaving lots of room for damping material. I can guess that making the frame thicker in front close to the tweeters might case a sonic problem. I don't know if a lot of steel nearer the magnets could cause any problem or if Magnepan made the frame thinner in places for sonic reasons or just to keep shipping costs down.

For damping material I have been looking at butyl tape (cheap) and Sorbothane products (not cheap) rather than the automotive stuff. Steel wins on density and price.

I found lots of interesting acoustics reading on damping outside of the HiFi world. One idea was to only dampen 25% of a vibrating surface (like the magnet frame?) as more damping didn't improve more.

I did find one post here that mentioned using an accelerometer....some of which cost more than the speakers. I found a cheap one used for speaker box design I will look into. The idea is to produce a graph similar to the REW waterfall for box vibrations by frequency. I braced a 1.7 to the wall behind (very rigid) for a quick test and could detect no change with REW but that test didn't deal with more significant bass.

My first tupid thought on speaker sway was a clear fishing line secured at the end of the front and back feet and the top of the speaker....but first I have to get an accelerometer.