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SE Reflexion filter resonance problem
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Old 6th September 2011   #1
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SE Reflexion filter resonance problem

I got myself an SE reflexion filter. mainly because the platinum selling band i had in had been using one for the rest of their recording and we wanted to keep the vocal chain and setup as similar as possible in case of drop ins and edits at a later stage.
Sooo

When the vocalist touched the mic stand or even stamped on the floor. The Reflexion filter rings like a bell. It also has some strange rattles as if something isn't tightenend up properly inside.
If you tap the edge of the thing it makes a long bonging noise around E flat or about 300Hz and rings for several seconds. Now for me that is not a good thing at all.
I'm thinking about adding more damping to it which seems ridiculous considering it is brand new and cost me £200. Especially if all the blurb is to be believed that SE put out.
When i tested the bonging with a frequency analyzer you can clearly see a major frequency bump starting at about 300Hz and then dropping down into sub bass as the thing decays and stops ringing.

If you sing a low note, D seems to set it off, It will ring at E flat quite audibly.

It's more of a resonator than an absorber or a diffuser really.

Has anyone had a similar experience with these things?

Apparently they have sold 50,000 of them!

I have had it for a few weeks now so it may be too late to take it back to the shop.

I am kind of reluctant to use it now as 300Hz is right in the middle of the vocal 'body' range. It is also most pronounced at the edges of the wings of the filter, right where sides of a cardioid pattern microphone will pickup.

Anyone from SE like to chime in?

Thanks

Jack
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Old 6th September 2011   #2
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Normally I do not have any of these resonances you're speaking of. However, I did modify my SE Reflexion Filter Pro, as you can read in this thread:

Suitable stand for SE Electronics Reflexion Filter?

I have been in touch extensively with SE before, but my experience is that when you make well founded critical remarks they come down on you in their full battle suit. For that reason alone I will never own any of their microphones again, but I cannot deny that the RF Pro just works when stripped to its minimum. So I'll keep using it. Please check out my advice and see if the RFP still rings after following it.
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Old 7th September 2011   #3
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If you mod it and tighten it up it works well.
Scroll towards the end of this post to the pic of the se reflexion and play with the parts until yours looks like this. You can go one better and get it to sit atop the stand (without extension) of a typical mic stand, which is pretty sturdy and way more compact than SEs intention. I've been meaning to post a step by step, but alas am lazy....

Studio SOS
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Old 7th September 2011   #4
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Quote:
Originally Posted by AndyFromDenver View Post
If you mod it and tighten it up it works well.
Scroll towards the end of this post to the pic of the se reflexion and play with the parts until yours looks like this. You can go one better and get it to sit atop the stand (without extension) of a typical mic stand, which is pretty sturdy and way more compact than SEs intention. I've been meaning to post a step by step, but alas am lazy....

Studio SOS
...or just follow the instructions right here
Q. How do you make a Reflexion Filter more stable?
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Old 23rd September 2011   #5
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Thanks for posting that link!

The mounting hardware for the Relflexion Filter is a pretty poor design in many respects, and despite continual lobbying the manufacturer seems reluctant to revise the system.

The 'SOS modification' which Paul White and I devised is a crude 'bodge' -- no argument about that -- but it does make the assembly substantially more stable when used with typical mic stands by bring the centre of gravity of then entire rig much closer to the mic stand's vertical axis.

My own preference is to mount the filter directly on to a straight mic stand (no boom arm), which it will do neatly with it's internal 3/8-inch thread. The mic is then suspended from behind and above using a second tall boom stand.

This arrangement makes it easier to position the mic independently of the filter, which I find quicker and easier. It also moves the mic stand further away from the talent which avoids accidental kicks and bumps. And it reduces the weight loading on either stand -- the combined weight of filter, mounting hardware and chunky LDC mic can easily be more than many mic stands can safely support!
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