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PostPosted: Mon Jan 15, 2018 9:35 am 
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Joined: Fri Apr 29, 2005 7:41 am
Posts: 483
Location: SE Quebec, QC, CA
I have PSB Stratus Silver i's that I bought in 2001. Always been well taken care of etc. in a no smoking household.

Is there any reason that the parts in the crossover or drivers would deteriorate over time ? They sound fine but I'm just curious if this sort of thing happens.

Thanks


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PostPosted: Mon Jan 15, 2018 10:08 am 
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Joined: Fri Nov 18, 2011 6:41 am
Posts: 395
Location: Ottawa, ON, CA
I have Tannoys that were built in the late 70s..Even though I had the caps replaced..it was not because they became defective or leaking only that its hard to accurately test them for proper tolerances. So some of them were replaced. I had the surrounds done also..but there was no real component failure. thus most speakers will last forever with some items requiring replacement due to age not abuse. There are cones ..diaphrams surrounds available for most speakers out there as there is a demand for these parts from the consumers end ..They like the sound of that speaker so there are the parts out there to keep them going forever.


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PostPosted: Mon Jan 15, 2018 10:19 am 
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Joined: Thu Aug 03, 2006 4:43 pm
Posts: 738
Location: Ottawa, ON, CA
Three things come to mind, although I don't know how many are applicable to your specific speakers.

1. The woofer surrounds: Are they foam, or rubber? Over time, foam will break down and rot, and eventually actually fall apart. Rubber lasts quite a bit longer, but does also breakdown eventually. Both can be replaced by a competent speaker repair tech (or even yourself with care and instruction).

2. Ferrofluid Tweeters: Over time, the liquid carrier in the ferrofluid will evaporate, leaving a sludgy residue around the tweeter voice coil. This in turn prevents it from moving properly, and cooling properly, and can lead to blown tweeters. Again, the tweeter can be disassembled, the old fluid cleaned out, and replaced with fresh, by a good speaker repair tech.

3. Electrolytic capacitors: If there are electrolytic capacitors used in the cross-over, those can dry out, and drift way off nominal value, and sometimes short out. Those are the easiest to deal with of the three issues I've mentioned.

Cheers, Dave


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PostPosted: Mon Jan 15, 2018 10:37 am 
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Joined: Sun Sep 07, 2008 7:12 am
Posts: 103
Location: Regina, SK, CA
dcrooks hit the nail squarely on the head.

Only thing I would add is the 3 points he mentioned happen very very slowly so you may not even notice the effects. If you could play a brand new set of your speaker side by side I bet there is a difference.


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PostPosted: Mon Jan 15, 2018 12:11 pm 
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Joined: Fri Jan 21, 2005 9:07 pm
Posts: 57
Location: Peterborough, ON, CA
Deant wrote:
dcrooks hit the nail squarely on the head.

Only thing I would add is the 3 points he mentioned happen very very slowly so you may not even notice the effects. If you could play a brand new set of your speaker side by side I bet there is a difference.


+1


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PostPosted: Mon Jan 15, 2018 12:23 pm 
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Joined: Thu Jan 06, 2005 6:44 pm
Posts: 484
Location: Ottawa, ON, CA
I am a believer that one should tighten with a manual screwdriver the screws on the actual speaker drivers perhaps every two years. It is not a matter to tighten them silly but to make sure they are all within the same torque.

I bought a used pair of PSB Stratus Mini and air was leaking from one of the speaker corner. I knew that upon buying them and it was an easy fix. LOL ideally one should buy speakers that don't let air comes out of the corners.

Bernard


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PostPosted: Mon Jan 15, 2018 12:48 pm 
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Joined: Tue Mar 20, 2012 11:02 am
Posts: 291
Location: Milton, ON, CA
Roughly how long should ferrofluid last?

I have speakers that use ferrofluid and are about 18 years old. How many more years should I get out of them before the ferrofluid needs to be replaced?

Audiois1st

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PostPosted: Wed Jan 17, 2018 10:10 am 
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Joined: Sun Sep 07, 2008 7:12 am
Posts: 103
Location: Regina, SK, CA
Depends. Could be as few as 5 or maybe they will be fine for 50 years. My guess is 18yrs they should at least be inspected.


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