The moment you know that the speaker foams need changing.

[rivetmaster]

I could hear them starting to go. There was a slight rattle, so I thought I'd capture the moment on camera. Had to pump up the bass a wee bit

 

[Eddy]

Got a FH 10 for free 5 years ago . Foams were already gone . Previous owner did that for me

 

[Hajidub]

Yeah, foams going or incorrectly newly installed will metallic rattle that voice coil. Weird though how increasing the bass, the movement of the speaker, helped. Might get away, for a bit longer, by removing and rotating the speaker 180 degrees, either way refoam is suggested.

 

[BoomboxLover48]

I have one that needs surround replacement. I replaced the speaker with woofers from center speakers of home audio but no match to the sound quality of those APM woofers. I will try to get those surrounds replaced.

 

[Tinman]

Just out of curiosity, are those square foams easy to find?

 

[floyd]

Just out of curiosity, are those square foams easy to find?

There are some on eBay . just search sony apm foam.

 

[rivetmaster]

I ordered these

I've heard the quality is not the best, but the price is good

 

[Hajidub]

Great Feedback, shop with confidence if the price is right!

 

[BoomboxLover48]

Just out of curiosity, are those square foams easy to find?

Yes, they are available!

I don't like those foam types that go bad within no time. Imagine it is 2.0 mm thick damn foam.

I prefer the cloth-reinforced rubber type surrounds. Cloth/fiber

There must be a way to make those with a mold.

 

[Tinman]

A while back, I ordered the cloth style for a pair of M90 woofers.
I chickened out and sold everything.

 

[floyd]

Yes, they are available!

I don't like those foam types that go bad within no time. Imagine it is 2.0 mm thick damn foam.

I prefer the cloth-reinforced rubber type surrounds.

There must be a way to make those with a mold.

If a 3d printed 2 sided. Mold could be made you could use polyurethane as the actual surround material.

 

[BoomboxLover48]

I meant dispersed fiber technology in rubber for surrounds.

Actually, fibers are dispersed in rubber compounds and that is the latest technology for making surrounds in high end speakers.

Synthetic polymers like polyurethane types comes second for durability and sound quality.

 

[BoomboxLover48]

Some FH Series don't have these foam surrounds. They have the rubber types.

 

[floyd]

Some FH Series don't have these foam surrounds. They have the rubber types.

I noticed that as well. The apm with the rubber surrounds are the best there's no contest .

 

[Hajidub]

Rubber will change the speaker characteristics completely if not originally supplied. You'll get another 30-40yrs out of a set of new foams.