Life of voice coil motor - speaker - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 09-24-2018, 04:13 PM - Thread Starter
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Life of voice coil motor - speaker

I have a full range voice coil speaker, Peerless by Tymphany model NE65W-04 2inch.
It is rated for 25W RMS and 40W max. It has 4ohms impedance.
I run it at about 3W at 120Hz frequency using a 15W amplifier and the amplitude is about 20-25% of max amplitude (based on amplifier's spec).
I want to find out what the lifetime would be for my spec. I have not been able to contact the manufacturer, or even obtain any MTBF (Mean Time Before Failure) data on their website. I need it to run for 10,000 hours at 25 hour cycles, is it safe to assume it will run that long since I am running at a much lower power than RMS? If not, I will have to design tests on my own to verify the assumption.
Please give your inputs.
Thanks
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post #2 of 4 Old 09-24-2018, 05:10 PM
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Quote:
Originally Posted by absubram View Post
I have a full range voice coil speaker, Peerless by Tymphany model NE65W-04 2inch.
It is rated for 25W RMS and 40W max. It has 4ohms impedance.
I run it at about 3W at 120Hz frequency using a 15W amplifier and the amplitude is about 20-25% of max amplitude (based on amplifier's spec).
I want to find out what the lifetime would be for my spec. I have not been able to contact the manufacturer, or even obtain any MTBF (Mean Time Before Failure) data on their website. I need it to run for 10,000 hours at 25 hour cycles, is it safe to assume it will run that long since I am running at a much lower power than RMS? If not, I will have to design tests on my own to verify the assumption.
Please give your inputs.
Thanks

Since it sound like DIY stuff, you may have better luck re-posting on these forum threads;
https://www.avsforum.com/forum/155-diy-speakers-subs/

I can see trying to have a break in period of a few days for this driver, 10,000 hours is insane


Ray
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post #3 of 4 Old 09-24-2018, 06:18 PM
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why ??
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post #4 of 4 Old 09-24-2018, 07:25 PM
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If you don't damage the voice coil by overheating it, nor damage the suspension by overexcursion, they will last decades in normal, or even fairly heavy use such as in a studio monitor which is likely going to get many hours more per week than it would in domestic use. If you're not doing either, stop worrying about it. There are drivers like Tannoys that still command large $ even though they are 40 years old, and I've had enough through my place, and measured them to know they're still fine.
EDIT: older foam surrounds tend to deteriorate, but newer ones age much better and they are generally cheap and easy to replace.

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