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When dealing with vent size one must remember speaker sound level impact on this, therefore keep an eye on power input data. Many softwares use 1 watt level for speaker modeling . At that level vent...

Sorry forgot the pic...

85981

I'm assuming DATS wise that you are following the instructions and procedures from Dayton Audio.

RE having an original 2235 to measure as reference, well I've posted (post #41) the parameters of...

Compared to last measurements, this time box relevant parameters (Fs, Qts, Vas) have improved notably, though Vas still somewhat short, but its been shown that Vas is less critical (error has less...

Your first 2235 done not 2225 as Grumpy indicated...

I updated a little the info on Weems' book, year and price.

Since its cheap, then I would suggest you start with Weems book to get a good...

Another interesting one, and much cheaper, is Vance Dickason, The Loudspeaker Design Cookbook.

I have 5th edition but its at the 7th edition now I think. More home theater audio stuff was added...

Unfortunately good engineering books are generally expensive. These don't have a large audience nor printing run, making cost per unit much higher. That kind of manual won't appear on best-sellers...

Hi Horn Fanatic,

RE "The typical volume gained by adding damping material would be 1.4 times the gross volume of the enclosure."

Just to avoid having too high expectations. Its not evident that...

RE "I was expecting different calculations other than a cylinder since it's hollow. Easy enough."

Since its a cylinder volume calculation, i.e. calculation of space taken or air displaced in the...

then you decide what net volume you want to use 5 or 6 cu.ft., read post # 63

Greg,

RE Port Displacement

Volume of a cylinder: V= Pi X radius squared X height or length of cylinder


Start with area of a circle: Pi X radius of circle squared, so 3.1416 X the circle's...

When all is factored in volume calculation and if still too large then you get say a cubic foot of cheap old books and put them at the bottom of the box, therefore taking some excess volume.
...

And you haven't counted good bracing yet...nor vent and the other drivers in the cab

Horns & drivers space taken .05 to 0.1 cubic foot (JBL)

Greg,

The typical 2235 box is 5 cu.ft. net tuned to 30 hz. Doesn't mean others are forbidden but then you need to model such to see the expected result with different tunings and volumes. Yes in...

what have you subtracted? 6.36 cu.ft. net seems pretty high to me when all in

Greg,

Looking at your Win ISD figures now is a little premature pending you get more final numbers after the drivers' good workout. Also too early to say if all this is for naught. Lets stay...

Greg,

Yes I knew about the mass ring, this thing is mentioned on the forum regularly since many folks have or want 2235. Barry here has shown twice recently with his measurements that the gain in...

Greg,

At least you have genuine JBL cone kits which should be better than cheap aftermarket ones, yes different but in a good direction as you say.

I think the key for you will be giving these...

Greg,

Who did the recones isn't really the issue here, but rather what recone kit was used, original JBL or aftermarket? Since you still have the receipt maybe its written on it the recone brand...

Greg,

For comparison purpose the following are the parameters given in the official JBL table:

MODEL FS QTS QMS QES VAS EFF PE XMAX RE LE SD BL ...

Hi Greg,

Your Win ISD version is the 2016 one and that's fine (most recent).

Even if QL7 came back that time, do check it periodically as QL10 WILL come back as default value (except in a saved...

Hi Greg,

Good idea to get the Dayton gizmo so that you know exactly what kind of TS parameters you're dealing with. Sometimes folks get surprises, not always pleasant ones, after some...

Hi Greg,

Nice to see you're back in business.

I haven't followed the thread from the beginning, but here's a few notes that should help you decide.

RE "you should place the driver in the...