Frozen Woofer, Polk Audio EX693a

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yoda888

Member - Posts: 15

Joined: January 08, 2004

Location: United States

Posted: February 29, 2004 at 1:14 AM / IP Logged

Ok folks, am I screwed here?

Amp: Alpine 4 Channel

HeadUnit: Alpine

Speaker: Polk Audio EX693a

I just installed these tonight. Unfortunately, one of the woofers is "frozen." I verified this by just listening to that one speaker. The highs work fine, but the woofer is "frozen." I swapped the speaker with the other side that I know works and it's still frozen. So it's not a connection issue, but a "broken" speaker issue.

Can this be fixed?

Is this a common problem?

Anyone see this before?

Thanks!

PS: I tried to move the woofer with my hand, and it won't move at all, unlike the other side that moves freely.

superstreet786

Silver - Posts: 339

Joined: August 12, 2003

Location: United States

Posted: February 29, 2004 at 2:40 AM / IP Logged

I had the same problem with mine... I went to the local car audio shop that always hooks me up and they told me my woofer had been underpowered and its completely dead so ull have to get a new one... luckily mine was covered on warrantee and i got a new one

---- 1996 Chevy S10 ----

1 Lightning Audio S2.600.2 Amp

2 Lightning Audio 12" Subs

1 Lightning Audio 1 Farad Cap

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yoda888

Member - Posts: 15

Joined: January 08, 2004

Location: United States

Posted: February 29, 2004 at 3:17 AM / IP Logged

Great..I dont think mine is under warranty anymore..especially since I never fill out those registration cards. Frozen Woofer, Polk Audio EX693a -- posted image.

Anyone got a receipt I can borrow? hahaha..

Underpowered? how is that possible? Do you mean overpowered? Even that would seem unlikely as the speaker is rated for 100w RMS, and 200w peak. Figure at 100w RMS you'd be pretty damn deaf with these speakers.

Clean Install

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Posted: February 29, 2004 at 6:18 AM / IP Logged

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auex

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Posted: February 29, 2004 at 9:01 AM / IP Logged

Basically you melted the plastic coating on the copper wire in the voice coil. You probably had your gains turned up to high and the amp was distorting.

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DYohn

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Joined: April 22, 2003

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Posted: February 29, 2004 at 10:25 AM / IP Logged

Here we go again. Underpower won't harm a speaker. Too much power kills speakers, not too little. If the speaker cone is "frozen" it is, as auex suggested, a fried voice coil and the speaker is gone, probably because your amp is either too big for the speaker or because you were driving it into full-out clipping. Which amp are you using? It could maybe be repaired by a competent speaker shop, but the cost will probably be about the same as replacing that particular 6X9.

brad123

Member - Posts: 18

Joined: February 22, 2004

Posted: February 29, 2004 at 11:18 AM / IP Logged

Also you do not have to fill out the warrenty cards to get warrenty. A manufacturer can not void a warrenty if it is not bought from an authorized dealer. It is illegal for them to do that, just let them kno it is illegal and they will fix it no problem. Hope this all helps.

Ravendarat

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Joined: February 23, 2004

Location: Canada

Posted: February 29, 2004 at 8:08 PM / IP Logged

DYohn, Underpowering causes distortion which causes heat which destroys a speaker, so underpower does cause harm to a speaker. I can never understand why this is so hard for people to grasp. If you truly understand how audio systems work than this should be an easy concept for people to understand. If an amplipher is to powerful and the gains are not set responsibly that can also destroy a speaker. Either way can damage a speaker but to say that underpowering cannot is just iggnorant.

caraudionut

Member - Posts: 9

Joined: January 15, 2004

Location: United States

Posted: February 29, 2004 at 8:54 PM / IP Logged

please help me to understand how under powering a speaker can destroy it . I have been building big concert rigs......for along time now as well as involved in car audio.....and this is the first time of have ever heard this argument. I have built and done componet level troulbeshooting on amplifiers and other types of audio equipment so im pretty sure that i understand the design.

So please help me to understand this "underpowering" theory....... im not saying its wrong but i have to have the facts or some better documentation besides just saying that people are ignorant.

MY commment to underpowering causes distortion...this would only happen at high levels with an amp would clip sooner or distort sooner causing damage. . I can take 5-10 watt all day long on a 200watt and that speaker will probably out live us all....but if i crank that 5-10 watt up sure it will distort sooner and cause damage before reaching a sutible listening level. If i take a 1000 watt amp on a 200 watt pair of speakers.....this is alot better than the 5-10 watt amp only because i will have alot more amplifier headroom and will reach the limitations of the speakers before the amplifier ( reaches clipping) or headunits reach their level of distortion.....is this what you mean by underpowering???? If so then i totally agree with you and this is the most common of all problems in car audio

Chris

auex

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Joined: December 23, 2002

Location: Arizona, United States

Posted: February 29, 2004 at 9:04 PM / IP Logged

Underpowering itself does not cause distortion. It is the user of the amp that turns the gain up causes distortion, or turns the volume up too much on the radio causing clipping and distortion. This is less likely for a user to turn the gains up on a more powerful amplifier because it in itself is louder.

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Always check info with a digital multimeter.

I promise to be good.

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