fi btl blown?

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mcben789

Copper - Posts: 171

Joined: October 01, 2007

Location: Mississippi, United States

Posted: March 02, 2008 at 9:39 PM / IP Logged

My friend has an FI BTL 18" fully loaded in about a 7-8 foot cube box being pushed by a Hifonics 2600 watt amp. It stopped working about a week ago, and he's had it working great (and pounding tits) for 2-3ish months. We checked out why it wasn't working and the terminal cup melted and the insulation around the stripped end of the wires on outside of the terminal cup were also burnt. We got a new terminal cup, and after a few days that also melted. Then we took the terminal cup out and checked the sub out and the wires going from the terminal cup INSIDE to the subs actual terminals were melted and there were burnt spots on the voice coils.

What the hell has happened to this sub. It looks like we accidentally threw a cigarette in the port and it exploded inside the sub (joke). Help me out guys so we don't mess up another 500 dollar sub lol.

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: March 02, 2008 at 10:02 PM / IP Logged

Well, it's a 2000 watt speaker, and you overpowered it. Was the amp also clipping? Plus, what was the tuning frequency of the enclosure and did you use a subsonic filter?

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mcben789

Copper - Posts: 171

Joined: October 01, 2007

Location: Mississippi, United States

Posted: March 02, 2008 at 10:44 PM / IP Logged

But I thought BTLs could pretty much handle anything. When you say its a 2000 watt speaker do you mean it peaks at 2000 or RMS? Talk about a huge mistake in reading the description of the product if we thought the 2000 watts was RMS..

I may sound stupid but I honestly don't know what a subsonic filter is. And the amp had no troubles as far as clipping as I knew. As far as the tuning goes I honestly don't know. My friend did the box to spec on the RE website. Probably not super accurate, but we're novices here.

Thanks for the quick reply. :)

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jmalbright

Member - Posts: 47

Joined: February 10, 2008

Location: Texas, United States

Posted: March 03, 2008 at 10:16 AM / IP Logged

Even if it is rated for 2000wrms, you said that you were feeding it 2600rms, which may explain your problem.

aznboi3644

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Posted: March 03, 2008 at 12:57 PM / IP Logged

Thermally the BTL can handle more than 2000 watts...if the power is clean.

My guess is that there was clipping. 2600 watts should be nothing for the BTL if you know what you are doing

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: March 03, 2008 at 1:19 PM / IP Logged

Either a clipped signal or an incorrect enclosure. In any case, the speaker got fried.

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thunda_hawg

Member - Posts: 46

Joined: December 21, 2007

Location: Georgia, United States

Posted: March 04, 2008 at 9:15 AM / IP Logged

was the box ported? if not the sub more then likely burned up without any means of cooling . also you say "fully loaded" did you perhaps get the competition style woofer that has the voice coils designed only for short blips at a time? The BTL can handle more then there rated power but only for the amont of time they are designed for.

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aznboi3644

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Posted: March 04, 2008 at 11:21 AM / IP Logged

porting a box does not improve power handling that substantially to fry the coils

mcben789

Copper - Posts: 171

Joined: October 01, 2007

Location: Mississippi, United States

Posted: March 04, 2008 at 4:44 PM / IP Logged

It was ported to spec. 2600 watts of Hifonics power. I just don't see what could have gone wrong.

I know Hifonics isn't the best company for what you call "clean watts", but it seemed like a good choice.

Back to the subject, I over powered it?

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jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: March 04, 2008 at 6:58 PM / IP Logged

ARE you using a subsonic filter set to the tuning frequency of the box???

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