help with hifonics brutus 1210D

[tsgtwheeler 10+ year member]

to start things off. I bought 2 12" kickers and a prefab enclosure to go under my seat of my 2006 chevy crew cab pickup and a american pro 2000watt amp for 200.00 not bad. only one channel on the amp worked so I had to wire them in series for a 4 ohm load. just tonight I bought a hifonics brutus 1210D. pulled the subs out and wired them in parrallel for a 1 ohm load. this inclosure is a sealed single chamber with polly fill. my problem is that it seems that the american pro amp seems to hit harder than the hifonics amp. the american pro is rated at 300 watts rms at 4 ohm and the hifonics amp rated at 1200 watts at 1 ohm rms is probably between 700 and 800 rms about 80% of overrated specs. could there be something wrong with this amp or setup wrong and setting help would be great. ie subsonic, bass eq, low pass.

setting right now

subsonic set to 15hz

bass eq set to 0

low pass at 12 oclock position

phase set to 0

level gain set to around 12 oclock

have the boos control pluged in and set to max seems no difference in pluged in or not should i even plug this thing in.any help would be great It seems these two subs should shake this truck apart even in a sealed enclosure.

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[Chin_Chilla 10+ year member]

1 that prefab is killing you

2 it could be that the american bass made more power at 4 ohm than the hifonics

3 did you set your gains with a dmm (digital multimeter)?

 

[CobraStang98 10+ year member]

1 that prefab is killing you2 it could be that the american bass made more power at 4 ohm than the hifonics

3 did you set your gains with a dmm (digital multimeter)?

x2 on all of this... Also the newer Hifonics amp do more than 80% of their ratings, most do almost rated power now. The Brutus amps from like 3-4years ago were that overrated.

 

[bigbangtheory 5,000+ posts]

So you are saying you wired the subs up at 1-ohm and it isn't doing better than the American bass amp at 4-ohms? Something is certainly wrong. Seems you have everything setup right for the most part.

Also x2 on that amp being rated. Should see close to 1200rms out of it on good electrical.

I say maybe something is wrong with the amp for it not to out do that other amp.

What VC are the Kicker subs? D4's I assume?

 

[tsgtwheeler 10+ year member]

yes they are dual 4 ohm. im about to go back out and check everything. again it was to late last night had to quit

 

[tsgtwheeler 10+ year member]

how would i set the gains with a digital multimeter I have one of those, just wanted to check the oms up my final right at 1.023 ohms to the amp.

todays info

ok. I have changed the + and - around seemed worse. ok I turned up the gain a little more and seem to have it wright hitts pretty good. I have the passenger side does not hit or move as far or as fast as the driverside. I switched the subs and same result. tried the phase on the amp and nothing. I pulled out all polly fill and same result. it does seem that the enclosure on the passenger side is smaller than the dirverside. but total enclosure is one single chanber. I called the person whom I bought this setup from and was told that he bought it at our local kicker dealer this is the sub enclosure they sell for these subs, for our 2006 chevy crew cab under the seat subs firing into the seat. I switched the audio cables around and installed new ones with no change anyhelp would be great really need to get this thing tuned asap.

 

[gunz4me 10+ year member]

Are you certain that everything is wired parallel and in phase? That would be the FIRST thing I would recommend checking!

 

[tsgtwheeler 10+ year member]

ok it only seems that this happens on certian cd, like bass mechanic snd my food for your woofers. could this be that at certian hz that the enclosure on the passenger side cannot hit these notes. i recently filled the enclosure throuout with polly fill to see if this would help and nothing. hits a lot harder now that i wirred both subs together in parrallel and only have one set of wires going to the amp in mono. unlike eariler i had both subs eired at 2 ohm then going to the amp in parallel using all 4 terminals. I switched subs again and the same thing. it has to do with somithing on the amp hz wise or the enclosure. I can see that the driverside is larger than the passenger side but do dividing wall both subs use the same air space but on the passenger side the enclosure narrows down to about 3 inches. will this have any effect on the one sub

 

[jpexpc 10+ year member]

If I'm reading this right you have managed to wire the same 2 subs to a 1 ohm, 2 ohm and 4 ohm load. This isn't possible........

Are you sure you don't have your subs wired out of phase?

You do realize that although there are 4 speaker terminals on that amp that it's still a mono and therefore it's essentially 1 output?

How many voice coils per sub if you're not going to list the model number? Or did I miss it somewhere?

 

[MkKin420 10+ year member]

Maybe the subs are canceling each other out somehow being that they are in a single chamber sealed box. Try a different box, and forget the bass knob there useless.