Replace 2265HPL with 2226H

[Kwikas]

The speaker I'm referring to is a JBL AM7215/95 http://www.jblpro.com/catalog/general/Product.aspx?PId=322&MId=2 and I'd like to know whether the 2265HPL driver could be swapped out for a 2226H without making changes to the crossover. It's subjective at this point I know but I'd like to get some peoples thoughts on this. Doable, not doable or doable with caveats?

[Ruediger]

I checked the JBL Thiele-Small parameter list from April 2, 2012. Here is what I found.

2265H: fs = 37 Hz, Qt = 0,32, Vas = 176 liter, Re = 5,1 Ohm.

2226H: fs = 40 Hz, Qt = 0,31, Vas = 176 liter, Re = 5,0 Ohm.

Get yourself the list and double-check what I found.

This means that the 2265H can be used as a drop-in replacement for the 2226H.

Ruediger

PS: that works the other way around as well. Take the 2265 out of the cabinet and replace it with a 2226 or even a 2225.

[Baron030]

Well, electrically both woofers would have simular impedance loads on the crossover network, with the 2265HPL having an "RE" of 5.1 ohms and a "LE" of 1.70 mH. And the 2226H has an "RE" of 5 ohms and a "LE" of 1.75 mH. So, I don't think that this is going to have an effect on the crossover point.
Now, I have not been able to track down the frequency response curve for the 2265HPL.
But, the 2262H response curve is posted here on this site.
And I am going to make some real big speculations here and say that maybe the the 2265HPL has a frequency response that is close to that of the 2262H.
The 2262H driver appears to have a very small and very broad midrange peak at around 600Hz.
While the 2226H on the other hand does not have this same small midrange peak.
And I am going to make another big speculation here and say that other then the differences in the midrange the 2265HPL and the 2226H have simular frequency response curves.

In looking at the low frequency section of the AM7215/95 network, it appears to be 4th order crossover with some kind of a RLC resonant circuit to reduce a small and very broad midrange peak at around 625 Hz. And this midrange peak is all of maybe 2db or 3db high. In the network that is pictured below and the RLC circuit is made up of R1, R2, R3, R4, L3, and C3. And also pictured below is the impedance load that this RLC circuit has on the crossover network.
So, if you were to try swapping out a 2265HPL for a 2226H.
I would start by running some tests with no modifiations to the network.
And if a broad and small dip is detected somewhere around 625Hz, then try disconnecting the RLC circuit by un-soldering one of the connections to L1 or C1, and then run the tests again.
And I would most certainly leave the high frequency section of the network alone.
Now, if there is a small peak or dip at the crossover point, the next step would be to try changing values of C1 or C2. But, any large peak or dip at the crossover point would involve changing the whole the low frequency section of the AM7215/95 network.

Without some really good test equipment this is all just a big shot in the dark.
So, is it Doable? Well, likely? But, you also have to ask yourself, why make this change?

Baron030:)5909959100

[Kwikas]

Baron & Ruediger - thank you both for such well researched answers.....in which Baron has asked "why bother"? The answer is that I'm building two 'front wide' speakers for my HT and the AM7215/95 most closely matches the drivers I have in my L/C/R so that's what I want to run with. For the build, I have the 2432H CD's, the 443495-001 guides and 2226h L/F drivers....(not the 2265HPL's as you know). My proposed build is a cross or blend between the AM7215/95 (H/F section) and the AM6215/95 (L/F). I do not have the crossover networks yet for either AM variant AND I would certainly prefer to go passive rather than active.....so your comments as regards the crossover are of particular merit. I can go active but passive is a neater option in my case. I know that it is likely some measuring will have to be done.....

[baldrick]

From another thread here (http://www.audioheritage.org/vbulletin/showthread.php?12950-JBL-2265-NEO-speaker-pics)
Hello
If anyone is interested I thought I would post a few pictures of one of the newer JBL 15 inch speakers. I am reloading all of my 15 inch biamped two way stage floor monitors with the JBL 2265 NEO 15. At only 8 pounds per speaker it's going to make moving them around much easier than when they were loaded with the JBL 2225's. I replaced the JBL 2206's in all of my 12 inch biamped monitors a little over a year ago with the NEO 2262 JBL and my back is still thanking me. The 2265 is basically a NEO version of a 2226 that handles more power, has less power compression, dual voice differential voice coils and only weighs 8 pounds!


As far as I've understood, 2265 are supposed to be a drop in "neo-replacment" for 2226 just as 2258 are for 2242 and 2262 for 2206.

[ivica]

Baron & Ruediger - thank you both for such well researched answers.....in which Baron has asked "why bother"? The answer is that I'm building two 'front wide' speakers for my HT and the AM7215/95 most closely matches the drivers I have in my L/C/R so that's what I want to run with. For the build, I have the 2432H CD's, the 443495-001 guides and 2226h L/F drivers....(not the 2265HPL's as you know). My proposed build is a cross or blend between the AM7215/95 (H/F section) and the AM6215/95 (L/F). I do not have the crossover networks yet for either AM variant AND I would certainly prefer to go passive rather than active.....so your comments as regards the crossover are of particular merit. I can go active but passive is a neater option in my case. I know that it is likely some measuring will have to be done.....

Hi Kwikas,

Here I can see that You have JBL sn/o:443495-001 waveguide ( as used in AM7215/95 box).
Looking from the figures of the mentioned boxes such waveguide looks very much like PT-H95HF.
Do You ( or any other) know what is the difference between sno:443495-001 waveguide and PT-H95HF,
owing to the price for the 443495-001 is around 54 U$D,
while for the PT-H95HF ( JBL sn/o: 338781-001 ) price is 176 U$D, about 3.5 TIMES more.

For sure, on the 443495-001, there are 4 (four) screw-holes less !

Regards
Ivica

[Kwikas]

Ivica, I'm not sure but the 443495-001 (my one), JBL also call a PT-H95HF-1. The PT-HF95HF (338781-001) is used in the AM6215/95 cab and has a 2431 CD bolted on to it....also it's used in the 5215/95 with a 2408H-1 CD. So, is it any different? Hmmmm....don't know....

[ivica]

Ivica, I'm not sure but the 443495-001 (my one), JBL also call a PT-H95HF-1. The PT-HF95HF (338781-001) is used in the AM6215/95 cab and has a 2431 CD bolted on to it....also it's used in the 5215/95 with a 2408H-1 CD. So, is it any different? Hmmmm....don't know....

Hi Kwikas,

many thanks for the info.

Regards
Ivica