JBL D2430K Available

[alskinner]

I confirmed with Melissa at Speaker Exchange that the JBL D2430K is back in stock if any one is looking for them. I ordered two for $767.68 which includes shipping.

Regards
Al

[alskinner]

Drivers arrived yesterday. Only took two days to receive them.

Regards

AL

[Mr. Widget]

Looks like Christmas!


Widget

[withTarragon]

Al, Congratulations on getting the drivers. Many years ago, the "version" of the driver meant for use specific use in the M2, would have a sticker on the side that said something to the effect "for use on the M2". I got mine a couple of years ago and when I ordered the vendor double checked and assured me they were for use with the M2, but there was no "M2" sticker on the side. There are various theories on why the M2 sticker was added ...... many of these theories are about a decade old.Quick question, do your drivers have the "M2" sticker on the side?Thanks, -Tom

[alskinner]

Hi

No they don't have a M2 sticker on the side. However, according to the part number 5032754X on the box it is correct for the M2. Hope that helps.

Regards

AL

[alskinner]

Tom,

Attached are pictures of the box which does state M2 on it

Regards
AL

[rusty jefferson]

Congratulations on picking up those drivers. I have not yet heard an M2 system but did listen to these on a pair of 4367s and thought they were excellent. Are you making a clone of one of those monitors?

[alskinner]

I'm not sure yet but leaning towards the 4367 mainly because of the passive network The problem will probably be finding the horn for sale for it.

The M2 is dsp controlled and building a decent passive network for it will be difficult for me but, the horn for the M2 is available. I'd love to build a true M2 clone but the electronics cost is prohibitive for me. It may be possible to modify the 4367 network to use with the M2 horn.

I've got a lot of research to do while building my skills to accurately measure the speakers response.

Any guidance or suggestions are always welcome.

Thanks
AL

[pos]

The M2 is dsp controlled and building a decent passive network for it will be difficult for me but, the horn for the M2 is available. I'd love to build a true M2 clone but the electronics cost is prohibitive for me. It may be possible to modify the 4367 network to use with the M2 horn.

It depends on what you call expensive, but you can probably replicate the original filtering closely enough using hypex fusion amps.

[alskinner]

Thanks POS

According to the M2 system requirements for either two Crown I-Tech 5000HD at $7,043.96 each or one I-Tech 4x3500HD at $14,496.54 for a true clone. A little too expensive for me. I appreciate your suggestion and will definitely
look into the hypex fusion amps.

Thanks
AL

[pos]

According to the M2 system requirements for either two Crown I-Tech 5000HD at $7,043.96 each or one I-Tech 4x3500HD at $14,496.54 for a true clone.

There are several other proven options available if you are ok to separate the amps and processors: BSS BLU, openDRC, DCX2496, etc.

[jmpsmash]

I'm not sure yet but leaning towards the 4367 mainly because of the passive network The problem will probably be finding the horn for sale for it. The M2 is dsp controlled and building a decent passive network for it will be difficult for me but, the horn for the M2 is available. I'd love to build a true M2 clone but the electronics cost is prohibitive for me. It may be possible to modify the 4367 network to use with the M2 horn.

A bit late in reply, you probably went a different route but I will put it here for reference.I have tried using the 4367 network topology on M2 horn. I didn't replicate the charge coupling, didn't have enough caps around. So I just replaced them with equivalent capacitance.Using the original 4367 network component values won't give you a flat response as is. They don't have the same exact response. It is confirmed from recent comparative measurements from sebackman. But they are pretty close so it is tweakable. When I did it I measured the response of the D2430K+M2 raw, replicated the network topology in Vituixcad and manually adjusted the response flat. It worked well standalone and the shape looks good. However, due to the difference in acoustic center between the 2 horns, phase matching won't work in the crossover region. More work needed to get that to match. I eventually added another order in the woofer network to get them to match.Ultimately, the overall sound was so-so so in the end, I abandoned the project.Looking back, I don't think it will be easier to use the 4367 network on the D2430k+M2 horn as it is not plug and play. Furthermore, if you are starting from scratch it will be cheaper to just do DSP crossover. The network is quite complicated and the cost of all the caps and inductors will likely cost more than a minidsp.

[jmpsmash]

apologies for the formatting in my last post. somehow all the new lines are not showing up.very strange.

[alskinner]

Thanks for the information on the passive crossover. I may try one in the future but the complexity of getting it right will take a lot of time. I think Ian is way ahead in getting the passive to work properly. I did get the crossover and the peq settings installed into the minidsp 2x4HD according to the paper POS(Rob) published. The only thing I have not put in is the Fir rephrase described in the paper as I will need to study the process more to feel comfortable doing it. Although it sounds pretty good the sound is not quite there yet. I still have a lot of work to do with room correction and tweaking the settings for the variation in the cabinet. I also started measuring the response with six studio audio tools as soon as I am comfortable with the measurements I'll post the findings.

Before I go too far I want to get the signal chain like I want it. I have a parasound A21+ coming and if it performs like I think it will I'll order an A23+ for the top end. One thing I discovered if the signal chain is not right it doesn't matter what you do to the speakers they will not sound the best it can.

Thanks for every ones help.


The Journey continues

Al

[Mr. Widget]

apologies for the formatting in my last post. somehow all the new lines are not showing up.very strange.

Take a look at this post by Earl. The forum is still broken and Earl found a way to make it less broken: https://www.audioheritage.org/vbulle...l=1#post442784


Widget