@chrisb
- The fibre fill is removed for the shooting
- Light as too thin or light as wrong material? I can always put on another layer, I guess.
@Cal, I don't know what you mean, but have a feeling this was for me?
@chrisb
- The fibre fill is removed for the shooting
- Light as too thin or light as wrong material? I can always put on another layer, I guess.
I'm thinking both, actually - but to be honest I don't know if anyone has conducted a thorough study of efficacy of the numerous types of fill / panel lagging used worldwide by builders of this particular design.
edit: revisiting your posted photo - what exactly is the material you've used? I looks similar to dense self adhesive felt material sold hereabouts as furniture protector pads (Felt-tack etc) - in small sheets an circles. I hate spikes myself, and use it a lot on bottom of floor standing enclosures sitting on hardwood or vinyl floors. If that's the case, I'm not sure any number of layers would have quite the appropriate absorptive qualities?
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It is polyester felt. Looks like those rounded pads for chair legs, but is actually a lot softer. 3 layers of it add up to 1/2".
It is impossible to find this kind of cotton felt you guys use. So a question: are there any alternative good damping materials i can find in regular hardware stores or something like that? Some kind of foam maybe?
The damping material problem has put my project to a halt, and I'm becoming sad.
The damping material problem has put my project to a halt, and I'm becoming sad.
You could try your local carpet seller & see if they have some nice underlay offcuts -not rubberised, obviously, something with nice open fibres (i.e. use common sense). If not, short & simple advice: accept the inevitable, get on with what you have and stop worrying. Life is far too short.
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2" fiberglass insulation. Should be able to find that just about anywhere, and it works.
In the FH3 the cotton or wool felt is intended to add more significant absorbtion to reduce early reflections from near the driver. It does not have a big impact on the LF response. One could try without it at al, with the likelihood of a bit more driver bleed-trhu.
Low desnsity 2" fiberglass will not fill the same role. One might be able to use it as a sub for the polyfluff thou.
Rockwool might work if you could get it thin enuff.
dave
Low desnsity 2" fiberglass will not fill the same role. One might be able to use it as a sub for the polyfluff thou.
Rockwool might work if you could get it thin enuff.
dave
Come on, get on with it! Use some common sense, get down to a few carpet places, see what they've got. Nice open fibre, wool or similar, preferably about 1/2in - 1in thick or as near as you can manage. Along these lines will do nicely: Felt and Wool Carpet Underlay | Discount Felt Underlay Prices | Delivery Next Day Stop worrying, start doing.
Endless supply from your local junkyard and in my case it was free.
I found the best stuff from the carpet backing of 90's Ford trucks.
Yeah it's free, but it's filthy, I've never tried washing any. But then again maybe the ancient cola that's soaked into the fiber from that spill will actually enhance the audio properties
John
