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About Jroo

  • Rank
    CarAudio.com Elite
  • Birthday 08/01/1974


  • Location
    richmond virginia
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  1. Jroo

    4th order design help

    Its been a long time since Ive seen someone that designed a 4th correctly to play flat. I had a few designs just like this where ported section was smaller than the sealed and were great sounding. I am going to dig up an old design for a sa 12 in a 4th that was modeled to play flat from 70 down to about 30. I wouldn't mind doing a 4th like that with the port firing through my ski hole, with a single 10 or 12
  2. Jroo

    Free Air 8

    most subs even an 8 are going to have real issues trying to meet up that high. Just food for thought, and not at all being a JL guy. The Zr800 is an incredible midbass. Most that use it and reviews out there saw 300 to 400 is the max, big issues above that and it will drop down to 40 or 50hz. The time I heard one in a car, I thought it was a sub up front. Guy played it with the sub on and off, and it went down pretty good. Know others on here will tell you of some other really good midbass that will play a similar range and at better price point. Not saying that there isn't a sub out there that can do what you want, its just going to be tough to find one. Also the other part is going to be the install of your door panel. I know you said you had door pods being built, but you also gotta put a fair amount of work into the door as well.
  3. Jroo

    Free Air 8

    are you looking for subs or a midbass? What frequency are you trying to get the speaker to run up to? You may also want to list a price point. Several good 8" midbass drivers out there but also depends on what you want to spend.
  4. Jroo

    Jl 18W6 coil size

    I paid 200 bucks and I think I literally ended up with the last batch they had. When I sent the order Credence sent me an email basically saying hold and 3 or 4 days later another email came and said I had one coming. I think they were looking around to see if they had enough parts left to make it. After I got the email, Credence posted they were done. With that being said I would do 170 plus shipping. I had one or two pms so we will see.
  5. Jroo

    Jl 18W6 coil size

    not sure what you are trying to do but I have a BNIB 18w6 in my house that I would be willing to part with. I got it when Credence cleared out all the 18w6s and made the last run they had available. Literally got the box, opened and placed in my closet. I am never gonna go with a sub that big so will sell if interested. Just PM me.
  6. getting conflicting info on the unit. Went to one of my local Rockford dealers and asked about unit. The other dealer couldnt tell me anything because they havent touched it yet. First dealer said they dont think it will work for me because you have to use the T harness? I thought it came with both Hi and Lo inputs but they are telling me I can not use my speaker level to this unit? My car is fiber optic to the factory amp and I have to use the speaker outs from the amp. In my situation, will the Rockford work?
  7. Im still trying to dig up my design. If I cant find it, who would be a good 6th order person to go to?
  8. Jroo

    Best LOC and door speakers need help

    If you don't want any processing, I would go with the audio control stuff. For a loc, just works really well.
  9. Jroo

    6 1/2" sub recommendations

    what frequency range do you want the subs to run? What you are trying to do has been done, but takes work and tuning. Since you have the 12 are you tying to pick up something you are missing? If you have an MS8 and decent front stage, I wouldn't worry or run rears or subs on the rear deck. I would run your front stage down to about 80 and let the sub pick up from there.
  10. I have a chance to get a SA8 real cheap used and wondered had anyone modeled the difference in ported vs 6th order? Years ago on caraudioclassifieds.org, had a few free 6th order plans and I remember a few said the Sa8 did really well in the boxes. I am going to try and dig up the plans. If memory serves me, they had two versions, one being bandwidth and one being high output. I would look more at the bandwidth version. Back to the question, has any modeled or care to model a single SA8 in a ported vs 6th order? The one I will end up with is 4 ohm final load on around 300 rms from an older JL slash amp in a sedan trunk.
  11. Jroo

    Pairing 8 inch Sub with 15in?

    What op is asking has been done and has worked. You shouldn't have phase or cancellation issues as subs should be playing different. I'll try to dig up a design bit the box had a box with an 8 and a 12 poth ported but different cuts. These were all back a few years but the biggest issue was localization of the 8 playing 100 down to 50. This was also before dsp was cheap. The guy I saw had a car that didn't have space for larger midbass up front or doors.
  12. Jroo

    what is good cheap deadner now.

    It wont be a lower end system. I replacing the factory 3 way in my Volvo. Doors from the factory are pretty solid. Behind the door panel is a large metal sheet that the regulators are attached to. The speakers also bolt into that large factory panel. I will deaden that and parts of the actual door behind it. Havent decided on speakers yet, but looking at everything from Focal, Hertz, Dayton and other raw drivers. I have two JL amps from my last install but may swap them out for something newer and more effeicient (JL 300/2 and 300/4) like some of the newer class D amps.
  13. what are some good deadner deals right now. The last time I did this years back, my local shop sold me some unbranded roll that was made by dynamat. Looking for something like that or a decent brand or up and coming brand selling cheap. Certainly looking for real deadner not peal N Seal stuff. Another forum said noico and have also heard of B-quiet. Again, haven't really seen any reviews on either.
  14. Looking at alternatives for my Volvo build. I have to use some form of LOC since my car is fiber optic from head to amp. I know I can tap the speakers outs in the factory amp and was originally looking at the basic audio control stull like lc7. My two local shops that sell audio control, neither has sold either one of the processors. The only review I can find is very brief from Crutchfield. I figure if I have to go the LOC route, might as well get some processing ability in the same package. Again, anyone seen these in use?
  15. My understanding is you can tune line lower than fs but shouldn't go the other way. Box shouldn't be tuned higher than fs