2452H-SL in a 2-way

[Zilch]

The driver is readily available and its performance is very good for its price point. The waveguides are readily available as well. This simple fact makes both products appealing to the DIY crowd and DIY folks should be able to come up with really nice 2-way systems using these products.

Two way? That would be me.

What kind of technical support? Do you want me to bolt one on to a consumer horn or waveguide, take some measurements and plug those measurements into LEAP?

Yes.

2452H-SL on PT-F95HF (JBL part# 338650-001,) the combination used in VP7212MDP, i.e., "Used as intended."

Someone must have bought all these 2452H-SL's off eBay... where'd they all go? Where are all the 2-ways using this c.d.?

Two projects are built, and two more are under construction, LE14H-3 being the preferred woofer, with 2235H as alternate, both @ 1kHz. We're presently using my half-ass adaption of N3134 crossovers as I don't have LEAP yet.

We'd like a compensation filter that could be used with 24 dB/octive L/R active as well as a full passive crossover incorporating it, such that a switchable version might be constructed.

I know how to do the building them part....

[4313B]

I can't get my head around using a 15" woofer up to around 1Khz

I use twelves myself these days but plenty of people still like the fourteen or fifteen.

[Robh3606]

Two projects are built, and two more are under construction, LE14H-3 being the preferred woofer, with 2235H as alternate, both @ 1kHz. We're presently using my half-ass adaption of N3134 crossovers as I don't have LEAP yet.

Post a couple of measurements on the waveguide. I can throw it into LEAP if your curious what it comes up with.

Rob

[Maron Horonzakz]

Is that a Haywood Wakefield cabinet between the speakers???

[Chas]

I use twelves myself these days but plenty of people still like the fourteen or fifteen.

Dammit! Another variable to think about

[Zilch]

Is that a Haywood Wakefield cabinet between the speakers???

Equipment stand....

[Zilch]

Post a couple of measurements on the waveguide. I can throw it into LEAP if your curious what it comes up with.

Thanks, Rob. This good enough for LEAPing?

[Robh3606]

Hello Zilch

Sure they should work just fine. Do you have an impedance and phase measurement with the waveguide on?? If you do post that as well. What's the difference between the files??

Rob

[boputnam]

Thanks, Rob. This good enough for LEAPing?

OK, now I'm confused.

Zilch - you've been listening to that confab, this way...?

Dood...

[Zilch]

Hello Zilch

Sure they should work just fine. Do you have an impedance and phase measurement with the waveguide on?? If you do post that as well. What's the difference between the files??

Separate file for each of the drivers, providing SPL and phase.

I'll generate the impedance curves to go with in Sinusoidal....

OK, now I'm confused.

Zilch - you've been listening to that confab, this way...?

Dood...

No, Bo, that's the raw driver response on the waveguides, four units.

Rob's going to plug those values into LEAP along with the additional information he's asked me to generate, and LEAP will prescribe a passive filter, or several, for me to try.

I've been running them on a modified version of the 4430 crossover....

[boputnam]

No, Bo, that's the raw driver response on the waveguides, four units.

...

I've been running them on a modified version of the 4430 crossover....

Ah. The sequence of your posts confused me. I thought you were showing the N3134 response. I'd like to see that.

I have a (possibly) vested interest in this - I am considering the VP7212MDP.

[Zilch]

I thought you were showing the N3134 response. I'd like to see that.

Here's one of the ones in Barzilay cabs with LE14As, with the pots at "Normal" (mid) setting. Owner likes the sound of them in his listening space without additional adjustment, but he has that available, if desired.

Even adjusted, they don't get perfectly flat; I believe I can do better....

[boputnam]

I believe I can do better....

I hope so. That is a "mountainous region" as we say in the biz...

I'm as troubled with the overall profile as I am the shoulders of some of those anomalies...

I actually don't know that I'd like to face that response, as an engineer walking in.

The really weird response 250Hz to 450Hz (++, really to 700Hz) would be best served (i.e., most elegantly) by a "MESA" algorithm, available only on the Dolby Lake processors.

Thanks for sharing the measurements. Always interesting to ponder!!

.

[Zilch]

You can't take anything below 1 kHz there seriously, Bo. You're looking at room stuff down there. That's unsmoothed in-room sinusoidal in ZilchLab @ ~1M, and the delay was not set for the gating.

Low frequency response would have to be done nearfield or groundplane.

It illustrates how the crossover is working with these drivers at the high end, mostly, and even that would be better measured MLS....

[boputnam]

You can't take anything below 1 kHz there seriously, Bo. You're looking at room stuff down there. ....

I keep thinking I'm looking at measurements of your beautiful 2-ways...