replaced my 2420 + 2344A with 2435 + PT-H1010HF

[frank23]

Hi,

I'm sorry I am not posting too often, but with two small children my JBL hobby only gets so much time...

I just wanted to let you know I have finally hooked up the 2435 + 100x100 waveguide (the 338785-002, or PT-H1010HF). I have had this combination boxed in my garage for years. I have done much effort to get the right horns and then I had 2 children (or, my wife did actually) and then, nothing.

I have hooked it up to the existing crossover that my 2420 + 2344A combination has been playing on the past few years.

Out of the box it sounds fine, but the drivers have been in my garage for the last few years so they probably get better (or different) when they come up to room temperature and everything has setteled down a bit.

I'll try to see how they develop over the next days. I know there are threads about this driver / horn combi, I was following them a few years ago and decided to buy this combination. So now I'll be able to hear them for myself.

regards, Frank

[Robh3606]

Hello Frank

I did the same change out a couple years back. Curious to see what you think.

Rob

[Mr. Widget]

...and then I had 2 children (or, my wife did actually) and then, nothing.

Then nothing audio related or nothing in your marriage?

Curious to see what you think.

Yes, please let us know how it turned out.


Widget

[frank23]

Hi,

After this one day I would say that:
+ stereo image is a little better
+ larger dynamic range
+ better pace
- the sound is a little harsher
- there are problems with S, T and F sounds

As things are now I'd prefer the old setup as it is nicer to listen to, but remember that I have just "plugged and played" this setup on the existing crossover, so perhaps it is not all fair to say so.

But I don't know how the slight harshness and STF problems would go away by changing the crossover values. They are quite obvious and in the old setup I got rid of them totally (and I mean totally, the Van den Hul The First Ultimate carbon interlink does wonders). Does anyone know the frequency range these problems occur in?

BTW I am a "high end" follower with class A amps, high end cd/da and carbon interlinks etc. Not from the "another 500W is better" school.

Regards, Frank

[Mr. Widget]

BTW I am a "high end" follower with class A amps, high end cd/da and carbon interlinks etc. Not from the "another 500W is better" school.

OMG!, you mean to say you actually listen to this stuff?!

I am not sure you'll be able to get the quality of sound out of the parts you are using... you might succeed with some work. I have heard variants on this theme at Zilch's place and never thought they quite made the grade for the, "Not from the "another 500W is better" school."


Widget

[Zilch]

My results were considerably better sounding once I abandoned the pursuit of comping them flat to 20 kHz, and just let them roll off in the VHF, as Giskard suggested. That came with using a modified version of the Timbers filter, elsewhere documented in this forum.

It's been over a year since I worked with these; I'm confident I could do a more competent job of it now, and that it would be a worthy pursuit....

[frank23]

Then nothing audio related or nothing in your marriage?

Yes, please let us know how it turned out.

Widget

Audio related! Although I did change components. But I didn't have time to rebuild my speakers as I liked.

Frank

[spkrman57]

You might need to attenuate the HF section a little to better match the overall efficiency of you system.

Just a thought......

Regards, Ron

[Robh3606]

- the sound is a little harsher
- there are problems with S, T and F sounds

Sounds like there is a peak in there. There may be a sensitivity issue as well I don't know if the 2435 on a 1010 is the same as a 2425 on a 2344??

Do you have any measurement capabillity like an RTA??

When I get a chance I will run a stock 2435 in LEAP with a 4430 crossover and see what it looks like. I have measurements of uncoated 2435's and Imp runs on the horn in the "library" so to speak so it should be a quick work-up to see what's up.

What components are you using from the 4430 network?? Is it stock or are you just going with the compensation in an active set-up??

When I did my own networks using that combo I needed a couple of notch filters to flatten things out.

Rob