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| Date: |
August 07, 2003 at 14:28:01 |
| From: |
Richard Greene , [ncache1.ford.com] |
| Subject: |
Adire Audio comment on low power amp NOT damaging their sub driver |
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I own an Adire Audio Tempest 15" subwoofer driver so felt I would be entitled to ask whether driving it with a cheap 30wpc receiver could be dangerous due to clipping. Here's the e-mail response from Adire Audio Tech Support followed by my e-mail question:
Richard,
Thanks for the e-mail!
A 30WPC channel amp won't damage a Tempest at all,
regardless of clipping. On the other hand, a 300W amp clipped heavily could cook a Tempest quite easily. Clipping is a problem in that it can double the effective power delivered to the driver, and do it with a much more damaging spectrum. However, I think the 30WPC concern is a bit overzealous.
Thanks again,
Adire Tech Support
---Original Message sent to Adire Audio Tech Support---From: Greene, Richard
Sent: Tuesday, August 05, 2003 8:37 AM
To: 'techsupport@Adireaudio.com'
Subject: Clipping dangerous to Tempest driver?
While a more powerful amplifier is being repaired, would it be dangerous for me to use a cheap ($98) Japanese 30wpc receiver to drive a DIY Tempest ported Sonotube subwoofer? I expect with only 30wpc there will be amplifier clipping but I did not believe such a low power receiver could damage a Tempest driver ... until I read what a pro audio speaker expert posted on the internet -- his post suggests to me that a 30wpc receiver could be a "Tempest
killer" even though the Tempest is rated at 750 watts power handling. Could you provide any comments on his warning quoted below:
"99.999999999% of amplifiers driving subs have feedback. When the amplifier clips this can destroy the woofer. It has to do with the time constants in the power supply and feedback loop of the amplifier.
Watch the motion of the subwoofer cone at clipping, it will generally have a 1~2 hz component to it. It is this 1~2 hz component at rail-to-rail output (clipping) that causes the destruction of the driver."
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Posted with TalkShop version
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