Problems with proper fusing.

[JoeK 10+ year member]

I have a Lanzar MXA 284 with 2 70A fuses built in. When i bridge my subs, the 70A burned out and melted within 3 minutes ( i am not exceeding the specced wattage). I replaced the 70A's with 2 80As, and the amp tripped in about 2 minutes and i noticed the metal starting to go.

What do i do to resolve the fusing problems? I have a feeling maxi fuses (the fuses in the amp) are not enough even at higher amperage. If i get two more 80A and get an inline AGU fuse rated for 200A, will this suffice? The individual channels on the amp don't provide the power i want, but the bridged mode does while melting fuses.

if im doing something wrong, be nice please >_>

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[trumpet 5,000+ posts]

Blowing fuses that fast is probably because your subs are presenting a load that's below the safe minimum impedance of the amplifier. Fix that or you'll destroy the amplifier(and maybe the vehicle) by your unsafe fusing practices. NEVER replace a factory fitted fuse with one rated for more current.

If you need more power and your amplifier isn't capable of doing what you want then you need a more powerful amplifier.

 

[JoeK 10+ year member]

Blowing fuses that fast is probably because your subs are presenting a load that's below the safe minimum impedance of the amplifier. Fix that or you'll destroy the amplifier(and maybe the vehicle) by your unsafe fusing practices. NEVER replace a factory fitted fuse with one rated for more current.
If you need more power and your amplifier isn't capable of doing what you want then you need a more powerful amplifier.

I have 2 SV 4ohm subwoofers bridged. Looking at the specs, it says bridged 4ohm minimum. Is there someway i can bridge these at a 4ohm load?

 

[MANTI5 10+ year member]

No

 

[JoeK 10+ year member]

No

Thats not good //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[BlakeC 10+ year member]

Thats not good //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

You're right. Next time you make a purchase please inform yourself better. Get yourself a wiring diagram or learn a little about subwoofer wiring. In the mean time, you should work on trading or selling the woofers you have for 2 dual 4 ohm woofer. Then with the wiring diagrams you find, you'll be able to wire them at a 4 ohm nominal impedence. OR you could find a 2 ohm stable amplifier and learn how to properly set your gain, and stick with the subs you've got. This hobby is all about knowing how to do things properly. Your equipment depends on you knowing what to do. Most people don't take the time to learn that and they burn through equipment like crazy. Good luck in the future.

 

[Horsemanwill 10+ year member]

don't bridge your amp you should be fine power wise ran stereo

 

[JoeK 10+ year member]

You're right. Next time you make a purchase please inform yourself better. Get yourself a wiring diagram or learn a little about subwoofer wiring. In the mean time, you should work on trading or selling the woofers you have for 2 dual 4 ohm woofer. Then with the wiring diagrams you find, you'll be able to wire them at a 4 ohm nominal impedence. OR you could find a 2 ohm stable amplifier and learn how to properly set your gain, and stick with the subs you've got. This hobby is all about knowing how to do things properly. Your equipment depends on you knowing what to do. Most people don't take the time to learn that and they burn through equipment like crazy. Good luck in the future.

The amp itself is 2ohm stereo stable, or so is printed on the amplifier. Its just bridged mode it says 4ohms minimum. Individual channels are not power enough.

 

[dirtyunclerandy 10+ year member]

Guess you need to do some shopping then

 

[BlakeC 10+ year member]

The amp itself is 2ohm stereo stable, or so is printed on the amplifier. Its just bridged mode it says 4ohms minimum. Individual channels are not power enough.

That is cool. It's not relevant to the discussion though.