infinity or rf

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=130363
Printed Date: May 21, 2024 at 2:43 PM

Topic: infinity or rf

Posted By: 04nata
Subject: infinity or rf
Date Posted: January 24, 2012 at 11:35 AM

Given the choice between to subs, what would you recommend (I have experience with Infinty but not Rockford Fosgate)

I will be running 4 of these.

Infinity Reference 1062W

Rockford Fosgate P2D410

-------------
2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0

Replies:

Posted By: haemphyst
Date Posted: January 24, 2012 at 1:29 PM

SQ or SPL? They're not even in the same league, really...

The RF is a true SPL woofer, with little to no regards to accuracy or listenability, and most ESPECIALLY the P series woofers...

The Infinity, while not even CLOSE to the venerable products of yesteryear, is MUCH more aimed toward an SQ installation. It's nowhere near a TC Sounds driver, or something integrating the XBL^2 technology, but overall, it's designed to be a better sounding woofer than the RF.

Ask yourself: "What do *I* want?"

-------------
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: 04nata
Date Posted: January 24, 2012 at 1:40 PM

I did ask myself that:

I am currently running two JL Audio 15W0V3-4 (which I love !) in a ported box for the deep rich base, but am also adding some 10's in a sealed box to give me better punch base, but I need dual 4ohm VC and JL only has single in that series, I like good sound and want to be loud but am not enetering and SPL contests. But I am on a budget so I like the Infinity and have used them before. I also considered Diamong Audio D310D4, but they are a bit more $$$.

also, I alread have the box build to Infinity specs for 4 each and IN the car (waiting for $$$ for the subs)

I would go with the JL if I could get 4 of them to total 2ohms.

Posted By: soundnsecurity
Date Posted: January 28, 2012 at 11:40 AM

if you are planning on running the jl 15's and the infinitys or rockfords at the same time then it will MOST LIKELY sound horrible. its a good idea in theory but it just doesnt work that way buddy.

-------------

Posted By: 04nata
Date Posted: January 28, 2012 at 12:05 PM

Gee thanx for that tidbit of info, but do you mind explaining ,WHY it won't sound good and/or a better solution? I've heard this layout before (not brand names) and it sounded good, but I am curious what might be an issue.

-------------
2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0

Posted By: soundnsecurity
Date Posted: January 31, 2012 at 10:03 AM

well i guess ill start by saying that good sound is in the ear of the listener. now your goal is to use an array of 10's and and 15's to theoretically get the best of both worlds. you want the "deep" bass of the 15 and the "tight" bass from the 10's. first of all, how a sub sounds is pretty much laid out by how it is built and which materials its made of and the design of the box you install the sub into. ive heard plenty of systems with 10's that sound just as deep as any 15, they just usually cant compete volume wise so you end up needing more 10's v.s. only one 15.

you will be using different subs, of different sizes, with different specs and designs, and running on different power, and mounted into boxes that will have different properties. unless you can actively filter the signals going to each set of subs so that the 15's are set to play only the lows and the the 10's set to play only higher frequency bass and then design the boxes so that the output blends at your crossover point then you run the risk of your subs cancelling eachother out, echoing, hiccuping ( because the pressure from the 15's will win the battle with the 10's when they hit causing them to move when they should be doing something else) its already hard enough to propperly set up a multi subwoofer system and you are just making it even harder by missmatching your equipment.

now with that said, will it work? yes. will it be louder than what you have? maybe but theres just as good of a chance that it will actually not be as loud. will it sound good? thats for you to decide but only after you have spent all the money time and effort just to find out everything that ive just told you so go for it cuz you gotta learn somehow...

-------------

Posted By: 04nata
Date Posted: January 31, 2012 at 10:34 AM

soundnsecurity wrote:

well i guess ill start by saying that good sound is in the ear of the listener. now your goal is to use an array of 10's and and 15's to theoretically get the best of both worlds. you want the "deep" bass of the 15 and the "tight" bass from the 10's. first of all, how a sub sounds is pretty much laid out by how it is built and which materials its made of and the design of the box you install the sub into. ive heard plenty of systems with 10's that sound just as deep as any 15, they just usually cant compete volume wise so you end up needing more 10's v.s. only one 15.

you will be using different subs, of different sizes, with different specs and designs, and running on different power, and mounted into boxes that will have different properties. unless you can actively filter the signals going to each set of subs so that the 15's are set to play only the lows and the the 10's set to play only higher frequency bass and then design the boxes so that the output blends at your crossover point then you run the risk of your subs cancelling eachother out, echoing, hiccuping ( because the pressure from the 15's will win the battle with the 10's when they hit causing them to move when they should be doing something else) its already hard enough to propperly set up a multi subwoofer system and you are just making it even harder by missmatching your equipment.

My plan was to x-over the 15's at 50hz and the 10's at about 70-75, but what you are saying is to have an active crossover on the 10's also that will keep it above 50 and below 75?

I have decided to go with same same everything, so all subs and amps will be JL, I am just going to use another JX1000.1D for the 10's at 4ohm load total and push only 500watts to them.

If I ran all subs at the same x-over and with the same (but bigger) amp would that be better or worse than what my plan is above??

or should I scrap the 10's idea and do 2 more 15's?

Posted By: soundnsecurity
Date Posted: January 31, 2012 at 2:36 PM

yea if you wanted to run the 10's then you would have to run a bandpass filter on the 10's and a lowpass on the 15's so that they dont interfere with each other. but really you would have to do this either way you went if you want to run two subs ported and two subs sealed cuz no matter what you wouldnt want them trying to play the same notes.

-------------

Posted By: 04nata
Date Posted: January 31, 2012 at 3:07 PM

see below

Posted By: 04nata
Date Posted: February 01, 2012 at 2:53 PM

one question:

we used to do this all the time (back in the late 80's) I had a mini truck with 2-15's downfired behind the front seats, and 2-10's in the back window (had a shell on the bed) and it "seemed" to sound fine back then, my friend had 2-15's and 4-10's in a wall in his car, and it "seemed" to sound fantastic.

So what am I missing?

Anyway, I have re-thought my system based on these finding and I will be going with 4-15's (Diamond Audio D315-4) in sealed a enclosure with 1.75 cuft per sub, all wired to 1 (for now) JL Audio JX1000.1D at 2ohms