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Multi-Way Conventional loudspeakers with crossovers

Goodmans Dimension 8 Speakers.
Goodmans Dimension 8 Speakers.
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Old 8th December 2018, 08:57 PM   #31
vishalk is offline vishalk  United Kingdom
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IMG_20181206_103127.jpg

Look at that gap!

IMG_20181206_153845.jpg

Used a scalpel to remove as much of the old glue as possible, then used a syringe to squeeze the glue in, spread it evenly. I then 3d printer a plastic ring to go over the surround and used clips to spread the load and not damage the outer surround area.
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Old 8th December 2018, 11:13 PM   #32
Galu is online now Galu  Scotland
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3D printer! This renovation's going high tech!
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Old Yesterday, 12:59 AM   #33
Charles Darwin is offline Charles Darwin  United Kingdom
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You could use them as rears in a 70s inspired home cinema system.

A pair of large IMFs and a single smaller one as fronts or something along those lines.
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Old Yesterday, 01:26 PM   #34
vishalk is offline vishalk  United Kingdom
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They would make brilliant surrounding sound speakers, although I will test and use them as front main speakers once I have finish rebuilding them.
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Old Yesterday, 02:35 PM   #35
vishalk is offline vishalk  United Kingdom
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Quote:
Originally Posted by Galu View Post
Thanks for the pics! Following with interest.

I suggest damping the vibrations of the plastic midrange enclosure by applying strips of Dedshete to the outside of the enclosure.


That was my plan, i have this stuff on hand:

Silent Coat 2mm 30 Sheets Pack Car Van Deadening Sound Proofing Damping Mat 702795788247 | eBay

I presume the mid enclosure contained absorbent material - was it the foam you mentioned earlier?
Yes it was a foam ring which fits over the midrange, i will just remove it and fill the midrange bath shape case with some acoustic wool type material
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Old Yesterday, 05:30 PM   #36
Galu is online now Galu  Scotland
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Quote:
Originally Posted by vishalk View Post
Yes it was a foam ring which fits over the midrange. . .
There's a possibility that the closely coupled foam ring is intended to damp the vibration of the midrange cone rather than to act like sound absorbent.

Such damping can be used to lower the Q of a driver and allow it to be used in a smaller enclosure.

Some experimentation should reveal whether or not this applies in your case.
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Old Yesterday, 07:04 PM   #37
vishalk is offline vishalk  United Kingdom
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One speaker I will leave original the other I will sound deaden and use different speaker wadding. I will use REW and do some tests see which one performs and sounds better.
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Old Yesterday, 11:11 PM   #38
Charles Darwin is offline Charles Darwin  United Kingdom
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If you want to try wool these are the cheapest suppliers I could find:
White Wools [3]

You can also chose the wool by breed. I think I used Massam for my T/Ls as it was the one with the longest fibres.
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