2241 Tuned Enclosure Plans?

[60cyclehumm]

Hey everyone,
For staters I'd like to say hello to everyone here as I'm new to the site. I've always like JBL's products especially using their GTi car audio series drivers back in my car audio days ofthe late 80's - early 90's. I'm thrilled to find the site!

Last may I bought this pair of cabinets off of Craiglsist for $80.




The guy I bought them from said they were EV. He bought them used and could only go by what the guy he bought them from told him. Once I got them home I came to the conclusion they were home made, but very well constructed. I also did some web searches but found nothing like this made from EV, much less by anyone elese. The guy told me they were loaded with EVM 18's, "had a lot of bass and were very loud". Not knowing if the cabinets were specifically built for the EVM's and not being a big of them anyway, I figure I'll be better off just loading them with JBL's. It seems the 2241 packs the biggest bang for buck on the used market and aren't a lot more than what I'm finding EVM's for. By the way, these cabinets have vents on either side of the internal enclosures for the 12" mids. I figure I'll block them off and install ports for the JBL's. I've now searched the interwebs lookig for a good cabinet plan but all I've come up with is JBL's site suggesting a 10cu.ft. cabinet tuned to 40hz. But I have read that they can be tuned to 30hz, which is what I wold prefer, if not lower, but I do know these drivers have their low-end limitations. I haven't calculated the exact volume of these yet but intend to soon. Just doing quick math, I have to guess these to be near 11 cu. ft. wiithout dedudtiong the 12" mid cabinet, which is triangler, or wedged, shaped. My rough guess is they take up at about a cubic foot of the whole cabinet. Being a carpenter/cabinet maker by trade, I can most certainly adjust the internal volume (smaller) if need be. Any suggestions would be most appreciated. A few details of my system is that they won't be used for live sound, just my workshop and a few ocasional outdoor parties. My plan is to tri-amp the system and have a 3-way 24bB slove electronic crossover.

I plan start threads about my mid and HF drivers seperatly from the LF's.

[Mr. Widget]

Welcome to the LHS Forum.

What do you plan to do with these cabinets? Will they be for crazy loud music playback, home Hi-Fi... ?


Widget

[60cyclehumm]

just my workshop and a few ocasional outdoor parties

[Mr. Widget]

just my workshop and a few ocasional outdoor parties

So then would you say the goal is closer to a PA speaker than a Hi-Fi speaker? The reason I ask is that a PA type speaker will probably satisfy your needs and cost far less to achieve.


Widget

[60cyclehumm]

I'm hoping to find someone to tell me to make the volume of the cabinets to be X and install X number of X diameter ports cut to X length to achieve a tune of 30hz. Being a carpenter/cabinet maker by trade, I can reduce the volume to whatever is best.

[Mr. Widget]

I'm not sure when you say "speaker" you mean driver or you mean aborting my stated mission. I guess I don't understand what any of that has to do with tuning the cabinets for 2241's.

I'm hoping to find someone to tell me to make the volume of the cabinets to be X and install X number of X diameter ports cut to X length to achieve a tune of 30hz.

The reason for my questions was that if your goal was to produce a higher performing system I would make suggestions to achieve that goal.

The simple answer to your question is to use the JBL enclosure guide: https://www.jblpro.com/pub/manuals/enclgde.pdf

Look at alignment 13.


Widget

[1audiohack]

The only JBL cone kits that fit that basket are the 2206 kits.

Barry.

[60cyclehumm]

The only JBL cone kits that fit that basket are the 2206 kits.

Barry.

Actually according to the three recone services and kit suppliers I emailed today say the 2226 is the only other cone that will work in my 1200 baskets. JBL specs say they go to 2,500 but also say that's 10dB down from it's senstivity rating.... if I'm reading the notes right. I'd like to hear from others the highest they've played theirs before I invest in reconing these. My money may be better spent on completely different drivers. This may get me banned from these boards, but I was looking an some Emmience 12's that play fairly flat to 4,500... for $150 each. Recone kits for my JBL's are $85 each (non-genuine).

[60cyclehumm]

I also understand the ports can be rectangular, which is what would probably work best as there's little room for 4" ports on the baffle board.

LOL... wouldn't it be awesome to find these cabinets were actually built for 2241's or similar JBL's!