Moley

Ok I am looking at either 3 10" alpine type r's or 2 12" kicker l7's. Both will be 1500 rms and both will be run off 1800 rms. Either way they will be put in a custom box to specs and ported up through rear deck in genesis coupe. I am leaning towards the 3 type r's. Some opinions to help me make up my mind would be great. Thanks in advance.

Lord Huggington

iTrader: (1)

With 3 10's there's more to go wrong. The ohm load for 3 subs could be 1.33 or 2.66 ohms, you won't get the full power but they're 500wrms anyways so 1800W is a good start if they're wired to 1.33 ohms. 2 12" L7s will get way louder. There's not enough cone area for the 3 10's to make a difference (226 vs. 235.5) in volume and Type-R's kinda suck, they have low efficiency. If you can, point 2 12's and the port forewards into the cabin, if the rear seats fold. 4.5-5 cubes @ 35hz for the L7s would be good for daily. There are better buys than an L7, take a look at Ficaraudio.com's BL 12". A BL 18" ($324+options+shipping) on 1000W would be better than 2 12's on 2000W. You'd need a minimum of 6 cf3 after displacements for an 18, how much space can you give up?

Moley

Well the 3 10's would be dual 2 so would be 1.33 ohms. I have a hifonics brutus 2006d, 1ohm stable amp that says 2000rms but most people say around 1700 - 1800 rms. Do you think that running it at 1.33 ohms would make a big difference in watts? I never really thought about the kickers having more cone area. I just went by 3 10's is 30 inches and 2 12's is 24 inches. I forgot that square subs have 20% more. And I think you are right about not being efficient as the sensitivity on the r's are 83 db 1w/1m. Still a tough call but your input helps. Oh I wanted to ask you why you say put the port forward. You think that would be better then through the deck facing up against the back window?. It is a small car and when I tried putting the subs I have now with the ports forward the air on the back of my neck was annoying.

Lord Huggington

iTrader: (1)

What vehicle? 1.33 ohms makes a 2000W amp put out around 1340W (2000*.33), I'm not completely sure on that, but less than 2000. The 10's have more cone area, it's just nearly the same as 2 12's so it's not something to consider. To calculate cone area you take it's radius (half of the total diameter) multipled by itself multiplied by pie (3.14) = 12/2 = 6*6 = 36*3.14 = 113.04 cone area for a 12". 83db vs 87 is a lot. Facing everything forewards is better IF you seal the cabin from the trunk with the subs and port in view when the seats are folded down (use particle board). When sound waves hit the back of the trunk they bounce back into the cabin hitting other waves which cancel eachother out. When a wave has more space to develop it can get lower which is why most subs sound better facing the rear because lower frequencies are louder to the ear and travel farther. If you seal it off it's like the cabin becomes the box and the actual box is an exterior wall. Have you ever put your head in the trunk when the bass hits? It's quite a bit louder. If you don't like air hitting your neck, wear a hoodie lol. Have you heard a system that sucks the air out of your lungs? That's annoying. You could always put the port on the passenger side.


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Don't use a second port length because it gets screwy with it.

red rocket

iTrader: (1)

I am running 3 type r 10's off of a fosgate 25 to life, and it hits stupid hard. I like it, it goes low enough for my liking too.

Lord Huggington

iTrader: (1)

I've heard R's in all kinds of noob setups:

2 ported 12's @ 42hz on 2400W @ 2ohm in a Cavy trunk
2 ported 12's @ 38hz on 6000W @ ?ohm in a Cavy trunk
(blew them 3 times, then bought Type-X's, very loud!)
2 ported 12's @ 40hz on 1500W @ 1ohm in an old body Cavy trunk
2 ported 10's @ 35hz on 1000W @ 1ohm in a Sundance trunk
2 ported 10's in a bandpass @ ?hz on 1200W @ ?ohm in a Sunfire trunk
2 ported 12's @ 40hz on 600W @ 1ohm in an MX6 trunk
2 ported 12's @ 36hz on 750W @ 1ohm on the backseat of a dodge ram 2500 4dr
2 sealed 15's in 5 cubes on 2000W @ ?ohm in a chevy 1500 ext cab (loudest)

A few of those were Alpine boxes and they completely sucked.

Still, none of them were louder or sounded better than my 05 RE XXX 12 in 2.2 cubes @ 36hz on 1500W, not including Type-X's on 6k, or 2 15's < 30hz. None of them were bad unless they were in an Alpine box. I've heard 2 ported 12" L7s on 1500W in a trunk and it was really loud, much more than Type-R's.

Do you want SQ, SPL, or a 50/50 mix? L7s will have more output, and Type-R's will most likely sound better.

cavana

iTrader: (2)

For someone who's from hamilton, you sure do know alot of gino's. And also have the best memory known to man.

Dukk

IMO you don't have the space to support either setup. If Alpine and Kicker are the two brands, I would consider a single 12L7 in 3cuft tuned to 35hz.

jalat

iTrader: (6)

x2

Kicker products for some reason require a large amount of cubic footage

Lord Huggington

iTrader: (1)

No ginos. That was from 2002-2005, 5 of those setups were my friends. Everybody had Type-R's back then. I remember everything I care about (Sagittarius).