JL 12W3V2 D2 Amp Help

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blg748

Copper - Posts: 194

Joined: October 29, 2003

Posted: December 07, 2004 at 10:24 PM / IP Logged

wow thanks today i couldnt help it i conneced my components to the deck and set my ALPINE MRV -T320 @ 220RMS*1 @4ohms its a v12 amp. GOD DAmn this JL is killing the civic wow the bass is amazing it is hitting like nutz more than enuff for me but everyone says i can get more outta it. I dont see what woudl be wrong wit ha PG Tantrum 300.2 Brided tat 300/1 @ 4ohms. a Class D is gonna cost me a lot. That octane R amp cant satisygy my needs cuz its a 500 /1 @ 2 ohms i need it to be 500/1 @ 4 ohms also 500RMS to a PORTED box is prob gonna k ill the sub thast what im thinking i dont wanan put more than 400W RMS to it. Im thinking when i can afford it a PG TI 400.2 brided at 400*1 RMS @ 4ohms PG makes killer amps. anywyas thanks for your help im gonna go look up some AMps that KFR01 suggested.

kfr01

Gold - Posts: 2,121

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Joined: April 30, 2003

Posted: December 08, 2004 at 12:13 AM / IP Logged

If you do go bridged buy a subsonic in-line filter from harrison labs around 30hz.

New Project: 2003 Pathfinder

blg748

Copper - Posts: 194

Joined: October 29, 2003

Posted: December 08, 2004 at 10:39 AM / IP Logged

ok what kinda amp cuz brideged are much cheaper how many watts rms should i pump into this sub since its in a 2.1cubcit feet box. Im feeding it roughtly 200RMS now and its banging to my needs but i do want more boom if i can get it.

kfr01

Gold - Posts: 2,121

Joined: April 30, 2003

Posted: December 08, 2004 at 11:07 AM / IP Logged

200-300 is fine. Don't go over 300, there's no need. Also, you probably won't hear much a difference between 200 and 300. You'd need to jump up to 400w (double the power) to increase the SPL by 3db. This subwoofer in a ported box should not be fed 400w continuously. So, with 300w added you'll be getting significantly less than a 3db max SPL gain. You'll barely be able to hear it.

Any bridgeable amp is fine. Get a decent brand that's actually rated correctly, or fairly at least. Alpine is a good choice, if you like that company. You can find the same Xtant 2x50w amp I use bridged to my sub for less than $150 all over ebay. It would serve you very well for the price.

Remember to get that subsonic harrison f-mod filter.

New Project: 2003 Pathfinder

customsuburb

Gold - Posts: 1,813

Joined: January 17, 2004

Location: United States

Posted: December 08, 2004 at 11:35 AM / IP Logged

This amp is better than the PG one you were looking at, and it costs less. You wont get a warranty from this store but you won't get one from ebay either so I guess it dosn't matter to you: http://www.ikesound.com/product-product_id/2401 Oh and make sure to use a subsonic filter on it like kfr01 said.

blg748

Copper - Posts: 194

Joined: October 29, 2003

Posted: December 08, 2004 at 3:20 PM / IP Logged

ok for now can i get some more detail on this sub sonic filteram i am not understanding it my ALPINE amp im gonna use it for a couple months the mrv-t320 2201 @ 4ohm RMS should i slap a filter ont his now ? i think i shoudl cuz you guysing are saying its importnatn please give me a site or somethign to help explain it. I appreciate all your help here thanks.

kfr01

Gold - Posts: 2,121

Joined: April 30, 2003

Posted: December 08, 2004 at 4:41 PM / IP Logged

You'll want to buy these.

Harrison Lab High Pass Filters

Might be one reason just to look for a mono subwoofer amplifier...

Basically ported boxes are tuned to a certain frequency. When music plays below that frequency the subwoofer distorts. This sounds bad. A filter like this will prevent the rca from getting these ultra low frequencies, those below your tuning frequency, so the woofer doesn't distort as much.

New Project: 2003 Pathfinder

blg748

Copper - Posts: 194

Joined: October 29, 2003

Posted: December 08, 2004 at 5:04 PM / IP Logged

should i be purchasing this thing right now im in CANADA so this may be a problem and also does it need to be connected near amp or near deck i cannot connect this neat my amp its gonna hit something for sure.its very long.

blg748

Copper - Posts: 194

Joined: October 29, 2003

Posted: December 08, 2004 at 5:35 PM / IP Logged

ok i found a ebay link here it is http:///.com/dll?ViewItem&category=14931&item=5726113377&rd=1&ssPageName=WD1V

is this what i need and which HZ i need

ok WHA Ti dont get is in this auction the guy is saying that a High Pass filter BLOCKs low frequencies why would i wand to block low frequencies to the sub doesnt the SUB process the low frequencies isnt that we have subs ? Im sorry if its stupid question but im not understandying why i need a HIGH PASS filter when it says that "The high pass (blocks low frequencies) shown as the red labelled model."..

From what i think in my mind, enven though im probably wrong but this makes sense to me, is that i need a a LOW PASS filter which BLOCKS HIGH FREQUENCIES. sorry if this is all confusing im just stillnot getting why i need a HIGH PASS filter. Maybe you can clarifiy some more.. Sorry for askign stupid questions.

kfr01

Gold - Posts: 2,121

Joined: April 30, 2003

Posted: December 08, 2004 at 5:39 PM / IP Logged

Order the 30hz high pass.

Your subwoofer shouldn't play the ultra low frequencies as it is in a ported box with a high tuning frequency. If it tries, it will introduce more distortion.

You'll ALSO need a low pass crossover, but most 2-channel amplifiers have those.

So.... if you use a 30hz high pass and a 80hz low pass you'll have a ~30 to ~80hz sub bass window. Most of the bass information you want coming from the subwoofer in music is from 30-80hz. Trust me, it will sound better than it would without the f-mod.

New Project: 2003 Pathfinder

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