SDA Newbie With Some Bad Vibrations

[CouryT]

I picked up my very first pair of SDA speakers yesterday -- 1b's -- and have been liking what I hear so far. (I upgraded from a pair of Monitor 10 Series II.) They are really delivering a bigger/wider/deeper soundstage.

However, when I play bass-heavy music, the rear panel of the left speaker is most definitely vibrating and making the sort of sound you hear emanating from a low-rider. If I press on the panel, the vibration stops and all is well.

So what's the best way to fix this?

[F1nut]

Remove the PR to gain access to the interior. Check the glue in/on the seams of the back panel for cracks or even if there is any. Either case, you will need to reglue the seam(s). Something like Liquid Nails should do the trick. Do NOT use caulk, hot glue, wood glue or anything with silicone.

Perhaps I should add, glue goes inside the speaker, not outside.

[CouryT]

Er, what is the PR and how do I remove it?

[drumminman]

Er, what is the PR and how do I remove it?

It's the largest driver, the one on the bottom of the front baffle. Simply remove the screws holding it on and pull it out. It's not connected to anything which is why it's called the passive radiator. It's driven by air pressure created by the mid woofers.

Once it's out you'll have plenty of room to work.

[nadams]

I have the same problem with my SDA2's. I've had the PR's out, and what I found is that there's no quarter-round in the seam of the back panel like there is on the front. My plan is to add quarter-round and glue it into place, mimicking what Polk did on the front panel.

Been planning on doing that for a year now... I should probably get around to it.

[CouryT]

Ah, okay -- got it. Now, the loose section of the back panel is actually at the very top of my speaker. Can I reach that far from the passive radiator hole? Just eyeballing it from the outside, it seems like a stretch (literally).

[F1nut]

No, you will have to remove the mid-drivers.