It blew up!
Thread Starter
Racer
Joined: Apr 2000
Posts: 429
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From: Houston, Texas
It blew up!
I had a 12" Polk audio Momo series sub in a seal enclosure that fit perfectly in the center compartment. I had a Rockford Fosgate 200.1 amp pushing the sub, but I had the bass control and all of the gains turned all the way up, so the amp gave out. I had insurance on it so I paied the difference and got a Pro Series two channel Rockford Fosgate amp (300SP) and it ROCKED!!! the gains were set below the mid-point and still the bass felt like it was kicking the rear of the seats! No kidding. The sound difference was tremendous. Well, after about two weeks the box started to give out. The presure inside the box was actually pulling the screws loose! :eek: The air started to escape making a horrible sound. Yesterday when I removed the box and played the woofer it sounded like it was blown. Could the air turbulance have caused this? The specs on the sub say peak power 1,500 watts, so I'm a little confused. Any ideas?
At this point I am frustrated and am considering removing all of my audio stuff from the car. :confused:
At this point I am frustrated and am considering removing all of my audio stuff from the car. :confused:
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Re: It blew up! (y2kylwc5)
I had a 12" Polk audio Momo series sub in a seal enclosure that fit perfectly in the center compartment. I had a Rockford Fosgate 200.1 amp pushing the sub, but I had the bass control and all of the gains turned all the way up, so the amp gave out.
Well, after about two weeks the box started to give out. The presure inside the box was actually pulling the screws loose!
I'm just curious and I'm certainly no expert.
Thread Starter
Racer
Joined: Apr 2000
Posts: 429
Likes: 0
From: Houston, Texas
Re: It blew up! (JoeyG)
I used 3/4 MDF and 1 1/4 screws. To seal the box I used silicone.
As for the original amp... yes, I am guilty as charged. I should have done better home work, but I started out with the idea that I just wanted some extra kick (bass) from the Bose system. I even went as far as telling the sale guy that "I'm not entering any competions, I just want something to blend in with the existing stereo. I don't really want anyone outside of the car to hear it." Well, he suggested the 200.1 amp, but we all know that once it was in the car... playing... I wanted more, so I turned everything all the way up. Once it gave out I knew I wanted more juice, so I went with the 300SP. With the new amp the system rocked! Big time! which is when I began noticing something was wrong. I think now that the sub is damaged because at extreme levels there is a slight poping sound.
Do you recomend the Rockford Fosgate HX2
As for the original amp... yes, I am guilty as charged. I should have done better home work, but I started out with the idea that I just wanted some extra kick (bass) from the Bose system. I even went as far as telling the sale guy that "I'm not entering any competions, I just want something to blend in with the existing stereo. I don't really want anyone outside of the car to hear it." Well, he suggested the 200.1 amp, but we all know that once it was in the car... playing... I wanted more, so I turned everything all the way up. Once it gave out I knew I wanted more juice, so I went with the 300SP. With the new amp the system rocked! Big time! which is when I began noticing something was wrong. I think now that the sub is damaged because at extreme levels there is a slight poping sound.
Do you recomend the Rockford Fosgate HX2
Instructor
Joined: Aug 2001
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Re: It blew up! (y2kylwc5)
I like you also used 3/4" MDF and Drywall screws. But, I used liquid nails on all joints inside AND out. Then applied about 10 coats of liquid polyurethane to the outside of the box. I have 1 square Kicker 12" 4 ohm DVC running @ 2 ohms with a Soundstream Reference 1000SX (1000 watts easy). Still holding strong after many hours of pounding :yesnod:
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Re: It blew up! (y2kylwc5)
I used 3/4 MDF and 1 1/4 screws. To seal the box I used silicone.
I think now that the sub is damaged because at extreme levels there is a slight poping sound.
Do you recomend the Rockford Fosgate HX2
I think now that the sub is damaged because at extreme levels there is a slight poping sound.
Do you recomend the Rockford Fosgate HX2
Sounds like a bad voice coil.
Not familiar with Fosgate brand anymore, sorry, maybe someone else will chime in. :cheers:
Safety Car
Joined: Jul 2001
Posts: 4,178
Likes: 2
From: Windermere FL
Re: It blew up! (JoeyG)
If you got leaks in the box, the back pressure on the speaker is no longer present and it is easier to blow if it is designed for a sealed enclosure. When you build an enclosure, use liquid nails and drywall screws. The liquid nails seal and hold the box together. The screws are just there to hold it together until the LN drys. I also run a bead of LN like chaulk to seak the box as well. Use 3/4" MDF or larger. Hope this helps.
