Can you add a subsonic filter to an amp?

[RooKie619 10+ year member]

theres a jbl 1200.1 on my local craiglist i wanna pick up but it doesnt have a subsonic filter is there anyway i can add one to the amp?

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[d77543020 10+ year member]

You will have to buy a fmod FMOD (Filter Module) High Pass RCA Level Crossover

 

[mylows10 5,000+ posts]

just run the amp thru a electronic crossover

 

[d77543020 10+ year member]

Most crossovers I've seen don't have subsonic filters

 

[lilboom 10+ year member]

Readup on the amp See if there's one already on it.???

 

[mylows10 5,000+ posts]

my old ma crossover does

 

[RooKie619 10+ year member]

Readup on the amp See if there's one already on it.???

lol, do you mean internally? its a jbl gto 1200.1 i bought it anyways for 100$ on craiglist

 

---------- Post added at 10:20 PM ---------- Previous post was at 10:20 PM ----------

 

im gonna probally buy a 20hz fmod

 

[BnGRacing 10+ year member]

You will have to buy a fmod FMOD (Filter Module) High Pass RCA Level Crossover

These work very well. Used to use them in IB setups

 

[dragnix 5,000+ posts]

lol, do you mean internally? its a jbl gto 1200.1 i bought it anyways for 100$ on craiglist 

---------- Post added at 10:20 PM ---------- Previous post was at 10:20 PM ----------

 

im gonna probally buy a 20hz fmod

damn that's a good price on that amp. Why do you even need a subsonic filter? How low do the songs actually hit lol?

 

[jirehn 10+ year member]

What is this fmod looks like and what is its purpose?

 

[Phoenix Risen 10+ year member]

if you know someone who is good with electronics you can have them build you a adjustable lpf that runs inline like the fmod does.

but if not then they are a good choice.

 

[RooKie619 10+ year member]

damn that's a good price on that amp. Why do you even need a subsonic filter? How low do the songs actually hit lol?

im gonna be using the amp on an eclipse ti @ 2 ohms ported I dont want the amp wasting power on notes I wont hear, I also read that it could damage your sub w/o a subsonic filter. If you go sealed box you wont need it. Anyone corret me if im wrong

 

[keep_hope_alive Premium Member]

Correct, below the tuning frequency the sub is unloaded, meaning the sub can be easily damaged from excessive excursion without resistance from the box. That is why you want a subsonic filter. Ah additional benefits from increased amp efficiency is a bonus.