I have a mtx thunder 7801 and a sledge hammer box

The mtx thunder is a 4 channel amp. 4 channels can't be bridged to 1 speaker. You can only use one side of that amp to bridge your speaker. Unfortunately your now only using half your amp.

It really depends on the music you listen to. 15's are meant to reproduce longer frequency waves, thus lower bass. The box dictates the kind of control and frequency you will be able to product. A ported box is used for mostly hip hop and rap. A sealed box is for more rock, pop, classical. The sealed will give you tighter response (basically the air acts as a cushion, not allowing the cone to reach full excursion easily), and a ported box give little resistance against the cone and allows full movement of the voice coil. Vented is just a ported box. But you can tune ports. I only recommend tuning ports if you are going to competition.

Ya. Just hook one sub to your amp (bridged) and hook the other sub (positive and negative) to the first subs positive and negative

it all depends on what kind of box the mtx subs are in as far as wiring the subs. The best way would be take the speaker wire from both sub boxes and run the positive into the right positive then the negative into the left negative. and run 8 gauge wiring kit to the amp because 10 might be to small and 4 is to big 8 gauge is perfect for this amp.

there are several ways, it all depends on the bass response you want, and with that, it also changes the ohms in the amp. i'm going to give you seval ways to hook them up. if you are running more than one just follow these steps per sub. the first one is if your sub is dual 2 ohm. Wiring Option #2

Wiring Option #2
this is for dual 4 ohm coils
Wiring Option #2

If you have proof of purchase(invoice or receipt) showing the purchase date and you are still within the warranty period then yes it would be repaired by MTX under the warranty guidlines, and by the way MTX is great at customer service and they are great to work with(very fair)!!!!
Keep in mind that the seal on the bottom of the amp cannot be broken or that will void warranty coverage.
Give them a call, you will be glad you did!
800 225 5689 - MTX Customer Service & Amplifier Service Center
Good luck !

Im kind of confused with what exactly your asking. Are you trying to run 3 subs off of an amp? If so, the RCA's should go to the front of the amp, and if your plugging 3 subs in to it, you need to have a 3+ channel amp. There is a way to hook it up differently though. I have 4 12" Hifonics subs running off a 2400 watt Nitro-BMW-486 amp. I just have two subs running to each of the two channels.

Sorry to say mate but that is one blown up amp! :(

My solution to this would be to get another amp

Sorry Matey

Upfront Audio

If there is a zero ohm connection across the B+ and ground terminals, it should blow the fuse as soon as you apply power.

 

 

 

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