PT-D95HF

[Zilch]

New small-format (8" square) 90° x 50° dispersion PT Waveguide with 1.5" throat for use with drivers such as 2452H-SL, 2435HPL, etc., BMS 4555 shown. Also accepts JBL PT throat adapter for 1" thread-on drivers:

[subwoof]

damn...I just mentioned that horn to him 2 weeks ago..

SO what's the LF limit??

Inquiring minds want to know...:)

sub

[John W]

C'mon, just a name and a picture?

[4313B]

SO what's the LF limit??I wish Mr. Widget would bolt a 435Be, 476Be and a TAD onto these waveguides and post his results. I've already run my curves. The word from JBL is that none of them have any bottom end. That seems to be true with the 2435/435 and 2451/2452H-SL but the 476 appears to be a whole different ballgame. If the TAD does too then the TAD is the way to go since it appears one can actually buy it. :)

[Zilch]

The word from JBL is that none of them have any bottom end.In the white paper, the "HF" designates high frequency, and that's been my experience. I typically end up between 900 Hz and 1.2 kHz minimum. The larger square "rotatable" versions seem to play a bit lower.

I haven't measured this little guy yet, but it certainly sounds nice with 2452H-SL as it's used in the VP product. It very much looks like a scaled-down version of PT-H95HF in its throat contours, which I have found to be the best sounding of all of them. The throat on that one is so long that you almost have to use delay to use it, though, which is why I have favored the "compact" PT-F95HF, recently available.

Could you post your measurements, please, perhaps in a new general PT Waveguide thread? I'll talk to Mr. Widget about doing another PT Waveguide study, if he's willing. There is a wide array of options available, and they are certainly affordable for DIY.

Of note: The JBL PT throat adaper converts any of them to 1" thread-on, Part# 339308-001, ~$20 last time I bought them. Yes, LE85 with two throat adapters works.... :yes:

[Chas]

Zilch, does the picture show the correct orientation to achieve 90 degree horizontal?

[Zilch]

C'mon, just a name and a picture?HUH?

I show a crossover and contour filter kludge, also, not to mention the venerable L100 woofer playing closed-box with.... ;)


Zilch, does the picture show the correct orientation to achieve 90 degree horizontal?

Yes.

[John W]

Are these horns something you can buy with a call to JBL Pro?

I checked around on the website but didn't see it on any of the price sheets.

[Zilch]

Are these horns something you can buy with a call to JBL Pro?Yes, from Pro Parts. It helps greatly if you have the part number, typically available on the tech sheets of the products which use them.

Understand that JBL is not in the business of selling these as components, there's no tech support, and you sometimes have to wait on backorder.

There are no specs on them, either, but what can be gleaned from studying those of the products, and by measurement of their actual performance.

We're also largely on our own with respect to crossovers and compensation filters for using specific drivers with them....

[Zilch]

All measurements in KLH-6 cabinet, 24dB L/R @400 Hz, no comp EQ, THD +30 dB.

2435HPL.

A familiar notch @ 14.8 kHz:

[Zilch]

2452H-SL:

[Zilch]

BMS 4555.

I'm running this driver crossed at 2.0 kHz in this system presently.

Impedance overlay vs. 2452H-SL, bottom:

[Zilch]

Are these horns something you can buy with a call to JBL Pro?Sorry, John, I forgot the links for this one:

http://www.jblpro.com/installedsound/vpseries/specsheets/JBL_VP7210_95DP.v4.pdf

http://www.jblproservice.com/pdf/VP%20Series/VP7210-95DP.pdf

[Skywave-Rider]

Sorry, John, I forgot the links for this one:

http://www.jblpro.com/installedsound/vpseries/specsheets/JBL_VP7210_95DP.v4.pdf

http://www.jblproservice.com/pdf/VP%20Series/VP7210-95DP.pdf

JBL says the 1" version will be in stock by end of this month (May).
Part #364700-001

Gasket part numbers are:
363645-001

[Zilch]

As used:

http://www.jblproservice.com/pdf/AE%20Series%20Compact%20Models/AC1895.pdf

http://www.jblproservice.com/pdf/AE%20Series%20Compact%20Models/AC2895.pdf

Also, a 120° x 60° variant:

http://www.jblproservice.com/pdf/AE%20Series%20Compact%20Models/AC1826.pdf

http://www.jblproservice.com/pdf/AE%20Series%20Compact%20Models/AC2826.pdf

[4313B]

There is a wide array of options available, and they are certainly affordable for DIY.Yeah, maybe you could try out some old LE175/2410's, LE85/2420's, 2421's or 2425's on these 1" throat waveguides. I probably shouldn't have given you so much grief about them early on; It looks like they are going to be the only things available for all intent and purpose and Pro is happy to sell them. The newest Consumer horns aren't even stocked anymore.

The price on those 2408H's looks pretty reasonable too.

[Zilch]

http://www.jblproservice.com/pdf/AE%20Series%20Compact%20Models/AC1895-WH.pdf

More info this thread:

http://www.audioheritage.org/vbulletin/showthread.php?p=253635#post253635

[Zilch]

Performance of the completed pair in AR4x cabs using Selenium D2500Ti-Nd HF drivers and modified EconoWave crossover.

Second image is system vertical polar map, +/- 15° about the waveguide axis.

Filter responses on the forward axis, bottom, with inverse null locating the crossover frequency, and minimum phase. Forward axis is 2" above waveguide center at 44" mic distance, i.e., arctan 6/44 = 7.77° upward tilt referenced to the midpoint between drivers.

Details here:

http://www.audiokarma.org/forums/showthread.php?p=3316259#post3316259

Compare JBL product performance here:

http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=1080