first off merry christmas everyone....

so i was just looking at the hifonics hfi 1500d amp that im going to get and i noticed that it doesnt have the same fine tuning controls like the mrp m1000 has for example... like it doesnt have a gain ****, instead it has these other ones that i was hoping you guys could tell me ... and its also comes with device that says boost so i was wondering what that does because i haven't seen that on any of the other amps...thanks and im sorry for these newbie questions but i just want to make sure i have my facts straight.

 

level=gain

 

Boost is your Bass control, Bass EQ should be the low side of the sound going thru the amp, for more thump jack it up. subsonic is a confusing switch to me because humans can't process anywhere near those frequencies low pass must be the gain on the low end. level should be how much power is going to your amp

 

wrong.

The hifonics amp is so dirty, you will blow the subwoofer up.

 

some people just need to learn from their mistakes. I haven't recommended anything except MTX. they have great amps. i stripped my cobalt day one of its pioneer crap and replaced it with MTX and rockfords.

 

I tried to sell him my JL 500/1.

 

heh. i think you can only go up from hifonics.
i used to have JL. but i had one that had some kind of defect and those jerks wouldn't replace it. so i was like, forget these sons a guns.
you know, back in my high school days when i had money to spend on fun things like that.

 

hah. This is my first jl amp. Got it last week when I bought the kickers from a friend. I need more power its really nice. I can see why they are so expensive.

 

Also, low pass is not a gain, it is a filter, like a crossover to keep unwanted frequencies from going to your speakers, sorry Alex but that is just some bad advice. Also I don't have anything against Mtx, but it's not like it's the best out there.

 

OH BOY, here we go again.

 

well sorry but can't blame a person for trying to get the facts straight

 

Yup, that's all it is about, and stxdangerranger does not have his facts straight. I don't want to see someone damage or ruin equipment from getting the wrong advice

 

Hifonics will be just fine if you set it up properly, car equipment failure almost always caused by the user!

Subsonic removes ultra low frequency and DC that your sub cannot play, this allows for protection, it also frees up power for the notes that the sub can play. ported box subs need this more then a sealed. this is a high-pass crossover (passes high freq, blocks Low Freq)

Bass boost can kill an amp and speaker if it causes the signal to clip. (think of it as a single band eq) it causes the power to be concentrated to a single freq band in the 30-60hz range depending on your amp. It should be avoided unless there is a dip in response in the exact freq.

When you boost too much it causes a peak that is out of relation to the rest of the music, That one boosted note will blast though but the surrounding notes wont. only certain songs will sound powerful while others will be weak. If your going to use it, then the gain must be lowered to prevent clipping.

low-pass should be set to the point where the sub matches up to the smaller speakers, too high will sound muddy, too low and you will have a "hole" or a dip in frequency response. it should be set somewhere in the 70hz-150hz range for most 6x8 and 6 1/2 speakers. Bass should sound like it is coming from up front and should not sound like its coming from behind you (in a properly setup system) don't not run a sub without it on.