What was the couse with 2234H
What is the 2234H ment for? Subbas applications?
Fast bass applications?
is it a well performing driver in that range between 50 to 280hz ?
better that 2235?
A friend of mine has put the 2235H in 375liters box and
ported to 21hz, and he says that he would not use it
ower 55hz..
i´m planning using 2235 in a subbas application, can i use
the 2234 in between 50 to 280hz then?
the difference between 2235 and 2234 ? weight? and then offcourse the FS...
i´m planning to use the massring on the 2235 to 17HZ
Searched, but could not find a answer to a hypothetical situation.
Has anyone actually used a pair of 2235's in a 4648 cabinet tuned for best performance?
I have 4648 cabs and if it can be done without losing much VLF I would be spared getting cabinets built for sub duty(in the home environment).
I believe the 4648 is 7.99 cu ft per someones post in the past.
Please feel free to comment here on this!
Thanks, Ron
That may happen next week.
Another option is to install (1) 2235 per 4648(I have a few of them).
With a single 2235 per 4648 I might try sealed and ported to hear the differences. With almost 8 cu ft per cabinet I will keep the power levels down.
With the dual 2235's per 4648, I am guessing the tuning will be slightly higher and power handling a little bit better. I am guessing the VLF extension with dual 2235's to be approx 5 hz higher than the optimum 2235 tuning in 5 cu ft cabs.
I hope to post some answers next week. I have to remove the (4) 4648's from their duty as a box spring/frame for my bed. I just did not have anywhere to store them lately.
Thanks, Ron
Forgive my limited knowledge here....
According to WinIsd, (2) 2235's in 7.9 cu ft using only (1) port of 5" wide and 4.385" long would be approximately the tuning that would work best.
The 4648 cabinet uses (2) ports that size. I would close one of them with a pipe tester(Zilch type) and will measure the results.
The 4648 is approx 7.99 cu ft according to apost I read back sometime.
And yes, I will have to put my mattress on the floor to work on this project!:blink:
I will have a few empty 4648's available to JBL forum members if someone wants. I don't have the room for them all anymore.;)
Ron
You have (2) 4648's coming your way....
Thursday still look good?
I actually will be able to use the space if you borrow them for some time.
When they leave your place, I just hope to find a home for them with someone on the forum who can use them.
I'm tired of trying to get $$$ for everthing I own. Just make someone happy instead!
Just found out this last weekend that a friend of mine might sell me a pair(loaded with 2226J's) for a reasonable price. So I will have TOO many to keep anyways!
Ron
Interesting reading while searching posts...
http://audioheritage.org/vbulletin/s...highlight=2235
I was reading to see how many different ways 2235's have been used by forum members. I was especially interested in seeing what a sealed cabinet would do.
After exhausting the searches(2235), I found only that using a 5 cu ft box sealed was not best.
If I went with that large sealed and did not gain anything compared to ported(at least that's the result I came up with), then using a 5 cu ft ported would be best end result.
So my search to use sealed cabs for the 2235 seems to be concluded with no good results.
I thought maybe the 4648's in sealed mode(single 2235 per cab) might have been persuable. After reading(eyes are tired now), I see that there is no benefit in that direction.
Ron
I'm not sure about everything WT2 does...
Here is what I got with both 2235's installed and both ports open to start:
Fsb = 19.5hz
alpha = 3
Ha = 1.939
Fm = 37.8 hz
I did not test after stuffing the ports(poorly just to get indication of change)
One other bad thing I did was having the cabinet horizontal on the floor.:o:
I just gave up on this since I have a pair of L200 cabinets in the garage and I know it will be easier to work with.
Grumpy - I did stuff one of the ports, and then fitted a longer port in the remaining one. I think your 2234's will do just fine with retuning the ports!
Overall, I think the LE14H-1 just walks all over the 2235H's, but just my opinion though!;)
Regards, Ron
Please explain the meaning of that result
Quote:
Originally Posted by
Giskard
Fm = 37.8 hz
That's about what I got with an impedance run in CLIO with two 1500AL's
mounted.
For my use with 2235's, that figure means its tuned to 37.8hz, right?
After stuffing one port(wadded up foam - I know it's not perfect - just wanted to hear a change to help me think it out), I installed a slightly smaller ID port and longer. Helped, but not enough to work for me.
Ron
Mike - Are we talking about 4648's???
Talk to Giskard as to what he will do with them when he is done.
I gave them to him to do with as he sees fit once he has finished with them.
Ron
What tuning changes did you make?
Quote:
Originally Posted by
Giskard
Right now both are loaded with dual 1500AL's which sound really nice.
I figure you had to re-port the 4648's for optimum performance!
Regards, Ron