Giskard,
Your explanations of various woofer comos is very interesting.
Have you had any experience with the imaginary tuning concept featured in some of the new JBL Statement speaker?
Ian
Giskard,
Your explanations of various woofer comos is very interesting.
Have you had any experience with the imaginary tuning concept featured in some of the new JBL Statement speaker?
Ian
Ian, LOL
No comment Or should I say "only in my vivid imagination"?
BTW what are comos?
Yeah but after looking at it further it isn't. Don't add mass to the 2242H.Originally posted by Giskard
Installing the 51629 mass ring in the 2242H will result in the following TS shifts:
.....
Mathematically, adding the mass ring looks to be a reasonably viable endeavor.
G.T. confirmed it would be a bad idea. They tried it and it wasn't all that great.
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
JBL Pro for home use!
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
JBL Pro for home use!
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!
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
JBL Pro for home use!
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
JBL Pro for home use!
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
JBL Pro for home use!
Went and installed the pair of 2235H's in the 4648 cabinet today.
Tried playing with the ports before I go and buy Plumbers tester (5.25").
I see no need to buy them. I will go back to using a pair of L200 cabs and call it a day.
The results of my experiment can be described easily:
BOOM BOOM BOOM
Nowhere near the finesse bass of the LE14H-1's, even when I used them in L55 cabinets(2 cu ft).
Experiment completed and done with.
Just goes to show that Winisd is not always correct with the sims!!!
Regards, Ron
JBL Pro for home use!
I'm not terribly surprised. You need to use your WT2 to measure what Vb really is though.
Does appear that 2234's would do better in this case... I still have to put a set of similarly
sized boxes together to set up a 4435 bottom end, so I'd hate to see this thread go kaput.
Ron, did you actually try blocking one of the ports? Where did you set your upper cut off
(or did you run them wide-open?)
-grumpy
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.
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
JBL Pro for home use!
There are currently 1 users browsing this thread. (0 members and 1 guests)