Blown mm12's

peterveg

Have a kenwood 401 mono block amp, settings are on lp, freq's are at 50 and the gain is less than half but higher than quater. The head unit is a kenwood 859 with the bass management at +6, the loud is off, nf is at 0 and the nf freq is at 80. I have gone thru (2) mm12's, one at a time, trying to figure out my problem has become a problem. Need help on what I may be doing wrong, do not want to hook up this third one till this problem is solved.

peterveg

you lost me on the equalization part. Wondering if I use a capacitor may help with this problem. Also I am looking at a MA Audio amp(hc2502) this is a 2 channel but bridged would operate at bridge 1 x 900 wrms @ 4ohm. Will this be getting to extravagant

PoweredByDodge

Here... think of it all this way...

first off... turn off ANY AND ALL sorts of loudness controls bass eq's or other sorts of enhancements on the head unit... make it so u just get flat ouput...

then , set your trebble where you want it for your hgihs... then click your bass up to like 1/4 of its total "gain" --- so if your head unit goes from 0 to 6 in the adding bass direction.. put it at like 1 or 2.

dont worry you can go back and change these later after you get hte sub in and working properly so it wont blow on you.

now... that amp is just not gona push a momo period -- i can tell you flat out that you are overdriving the amp into the sub or just flat out underdriving the sub to the point of killing it.

you need a higher power, cleaner amp.

I suggest an mtx 8302 (300 x 1 12.5 v -- 445 x 1 @ 14.4 volts) or try to find something by alpine (old alpine -- around the years they made the 1507) that'll do 500 or 600 x 1 at 14.4 volts.

now... assumign that kenwood has the 4 volt preout - that means u have 2.2 volts rms preout --- the gain sensitivity on your kenwood is 4 volts so you'd have to set the gain to dead on half to on the kenwood amp you have to even get the power you shoudl be getting.... the mtx has an input sensitivity of 8 volts.. so you can set the gain to about 3/4 --- and put the adjustable crossover so that it is "straight up 12 o clock" (80 hertz). bass boost at half (9 db's). This setupwill give you goodsolid performance out of a momo subwoofer --- i've seen it done at least 5 times... same amp, old momo sub, and it sounded great. If you're still having problems after that.. then I seriously suggest you go over evetything in thecar with a fine tooth comb from power lines to the head unit to your patch cables speaker wire and even the airspace within the vehicle.