Subwoofers / Speakers

Has anyone used one in an IB configuration in a car?

I currently have 3 JL 10w0's in a sealed box running of a infinity amp that puts out 600rms at 2 ohm. I want a louder system but i dont' have enough money to buy a new amp and the JL's just arent cuttin it. I was thinking about getting a mach 5 mj 18 and putting it in a ported box. Does anyone know this set up will work good with my current amp and be louder than the JL's?

i currently have 3 JL 10w0's in a sealed box running of an infinity amp that puts out 600rms @ 2ohms. Im frustrated with the wimpy bass im getting from the JL's. I found a great deal on a MJ 18 4 ohm. I would plan on putting the mj in a ported box and i was wondering if the MJ would increase my output with the same amp?

I have a RF 1000-1BD, and I would like to buy an MJ 18, but my amp will do like 550 @ 4. 900 ish @ 2 and 1300 @ 1. So I need a dual two or dual four. No possibility? No, getting it and reconeing and using different coils is not an options.

With only 800-900rms total

whats the best box to use ported or sealed? , how much of a difference is there?, what should it be tuned to? and what size? thanks also any one have a video of a mj-18 in action thanks again

does anybody know it? IIRC its 17 1/4, but i dont remember i emailed Mach5, but its sunday and dont know if they will reply... thanks in advance....

Well i got my MJ-18 4ohm last week or so and i had the day off today so i made a box for it, 26 in. wide, 23in. high, 18in. deep, box volume 4.52 (ft3), tuned to 25 hz, 3?4 M.D.F. and no stuffing. Well, when i used an amp that i had pushing a C.V. 15in., just a plain 300 watt 4ohm plate amp and it did dent sound good at all, put the amp back to the 15 and it sounded great. Hooked up the 18 to a amp in my truck and still sounded like crap. What to do What to do? I put a few pics up in the subs area.

Well, I received my MJ-18 last week and I am excited. I will be using the same size enclosure that Mark used on his Sonotube sub which is 8.8 cu ft. I've used lots of mdf in the past so the main enclosure will be made out of 13ply oak plywood with mdf bracing. I'm hoping to get started this weekend on the enclosure. By the way, how do I post pics? I don't see an attachment manager.

I saw some mj-18 motors for sale and I was wondering could those be reconed into 15's using IXl baskets and softparts? if so please let me know. Thanks, Ryan

Hi everyone, If you are interested in seeing some test measurements of the MJ-18, you can go to the web link below. I took some frequency response curves and in-car SPL measurements. http://testbed.mach5audio.com Best regards, Mark

I am soon to happen upon $500. i decided to buy two Mj-18's and two of these: http://www.millionbuy.com/boscx2000m.html now my only problem is i dont know jack about boxes, i need some ideas. now, the only thing i ask is nothin higher than 28Hz. it is going in my room, which is medium sized, about 20x20. i also happen to have an Spl vice, which is why i am buyin a Boss amp(almost no SQ, i know) Thanks for any ideas on this.

so it says 4.5 cu ft recommended for ported box for an mj 18. how would it affect sound and output if i was to do say...6.5 to 7 cu ft. each? tuned to 30hz? would i get more bottom end? more output? what...

im working on a box for two mj18s and have a few questions what size of port do i need for a box 4.5cf tune to 30hz? would there be a big dif if the box was 4 cf instead of 4.5? ( my box is 9.36cf) any building ideals or stats or thoughts would be great thanks roddy

Next week ill be buying 2 MJ-18"s for my explorer. 12.4 cu ft box tuned to 31 hz. gettin 700rms each. will this get loud enough? ive been spending a lot of time in my friends denali with 2 Fi BTL 18"s and i dont wanna be disappointed. while im not expecting output like his...will i come close at all?

My friend wants an 18 in his jeep and I wanted to know how do the 2 of there 18" subs compare.. He wants a good sub for cheap so I told him Mach 5 was the way to go.

Just thought I would let folks here know that the MJ-18M will begin shipping in about a week. I am just waiting for packaging. I had mentioned voice coil options and I plan to deliver on this. Very soon there will be a 2 Ohm and 1 Ohm version available. Those who want the 4 Ohm version can purchase them now - you will be placed in front of the order line. Thanks for your patience. Mark

Just wondering how much power handling will decrease in an IB setup with the MJ-18M. I know power handling is probably not that important, but i just want to use it as a reference. Would i be safe in assuming that it will be halved from the normally rated power handling?

have you ever thought about offering the mj's in diffrent sizes. its an incredibly priced 18 but not everyone has room for and 18. i think they would be great budget subs. they have decent power handling and xmax so it would be a great alternative to the over-hyped type r.

Well I have an old body style s10, 3kRMS, and 15.64cubes of volume. Not really sure what to do for the port but I was thinking of a 4"port spanning 44" across the top of the box. or one flared center port being 5x36 and tuning about 32hz... let me know what you guys think

Hello, I am somewhat new here and just purchased yesterday a pair of MJ18's. Gentleman had four of them in a wall behind the second seat in an Astro van and they sounded wonderful. I do believe he goes by Stu something here. Anyway I wanted to know what the cut-out Diameter is for these subs. Thanks, Chris

Mark or anybody that can answer, I have an mj18 that recently got a hole knocked in the surround and the dust cap crushed in, the speaker still sounds good but I would like to fix these issues if possible. Can I resurround the mj and put a new dustcap on it? How much for the parts, we have resurrounded speakers before just not the MJ. Thanks!

got my mj18 installed, just no decent power to push it, using a pioneer gm-5200t FTL. thinking of buying a punch 150 25 to life, any one know if they are able to push what the birthsheets say? (1000w)

A while back I picked up 4 MJ18s for use in my home system and I was recently finally able to get them on a Klippel analyzer to see how they perform at small and large signals. I'm posting the information here for anyone else who cares. First off, the unit to unit variation was small. For the linear parameters I'll list the average and for the nonlinear curves I'll show one of them; the rest are similar. The linear parameters are determined in three circumstances: the driver at very small signal, the driver at large signal but cold, and the driver at large signal and warm (after playing some time). Which of these to use really depends on the application; in my case I u…

so what dos the mj-18 sound like? SQ/SPL I am going to buy one and put it in a 4cu/ft@29hz what would you campar it to