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Multi-Way Conventional loudspeakers with crossovers

B&C DCX464
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Old 9th April 2019, 09:50 AM   #21
USRFobiwan is offline USRFobiwan
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B&C DCX464
And what type of horn or waveguides will work on the 1.4" exit with a range of 500hz-20kh. I do not think it will just sound good on any current 1.4" horn or wg.
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Old 9th April 2019, 02:04 PM   #22
b_force is offline b_force
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Most 1.4" exits go to about 15-18kHz.
Good enough for what these things are made for; high performance, high SPL solutions.

It's only going to be a bit of a challenge to get a good working horn that goes down to 300Hz without any major problems effecting the higher frequencies.
My first guess would be more like a multi cell or similar construction.
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Old 9th April 2019, 09:15 PM   #23
Ro808 is online now Ro808  Netherlands
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You'll probably want something like the K402, or a diffraction horn such as the Celestion 90x45 horn.
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Old 6th May 2019, 03:46 AM   #24
Ro808 is online now Ro808  Netherlands
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Another hijacker that looks very promising...


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QUICK ACOUSTIC SPECS


Nominal Impedance: 8 Ohm

Minimum Impedance: 8.3 Ohm

AES Power above 0.9 kHz: 120 W

Maximum Power above 0.9 kHz: 240 W

Minimum Crossover Frequency: 0.7 kHz

Sensitivity (1W/1m): 109 dB

Frequency Range: 0.5÷20 kHz

Voice Coil Diameter: 86 mm (3.4 in)

Diaphragm Material: Ketone Polymer

Diaphragm Shape: Annular

Flux Density: 2.2 T

Re: 6.8 Ohm

Phase Plug Design: Radial
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Old 8th May 2019, 01:22 AM   #25
tommus is offline tommus  United States
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Re: the Faital HF1440

Can this really be a good driver for use on a constant directivity horn?
It's down to 100db/1W at 10kHz on the tractrix horn used for testing. Even with its massive power handling, after the necessary EQ it seems like it would be nowhere as loud as a garden variety compression driver. Or am I missing something?
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Old 8th May 2019, 02:07 AM   #26
Patrick Bateman is offline Patrick Bateman  United States
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That's a valid observation. Here's a BMS 4552 for comparison:

Click the image to open in full size.

We're dealing with the "Magic Triangle" of compression drivers:

1) you can make it affordable

2) you can make it efficient

3) you can give it a wide bandwidth

pick two.

There's an interesting new family of compression drivers from B&C, BMS and JBL that use unusually small throats, and it seems to increase the SPL above 10Khz. For instance, the BMS 4538HE produces something like 110dB at 20khz with one watt!

Whenever I'm building a speaker, the tweeter usually ends up being the weak link for me. So I'm eager to me dated with a set of these.

Unfortunately, there's still no free lunch. Power handling is just 25 watts. But the BMS produces more output above 10khz with 25 watts than the Faital does with a hundred. Of course, the Faital plays lower though.

Decisions, decisions.
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Old 8th May 2019, 03:09 AM   #27
ErnieM is online now ErnieM  United States
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Quote:
Originally Posted by tommus View Post
Re: the Faital HF1440

Can this really be a good driver for use on a constant directivity horn?
It's down to 100db/1W at 10kHz on the tractrix horn used for testing. Even with its massive power handling, after the necessary EQ it seems like it would be nowhere as loud as a garden variety compression driver. Or am I missing something?
Not a big issues since there's not much music up there.

It might come into play at long distances as found at large outdoor festivals when hot dry temps are present. Though in those cases even the most efficient uhf driver will not totally or sometimes even partially make up for the losses .

Last edited by ErnieM; 8th May 2019 at 03:14 AM.
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Old 1st June 2019, 12:37 PM   #28
Flaesh is offline Flaesh  Russian Federation
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Quote:
Originally Posted by bwaslo View Post
Any idea of what cost might be on these?
Available from 400 EUR to 55555 RUB (it's about 750 EUR)
Any tests\measurments\listenings yet?

Last edited by Flaesh; 1st June 2019 at 12:43 PM.
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Old 1st June 2019, 03:09 PM   #29
jzagaja is offline jzagaja  Poland
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Do we know dcx464 exit angle?
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Old 1st June 2019, 08:30 PM   #30
Flaesh is offline Flaesh  Russian Federation
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Originally Posted by jzagaja View Post
Do we know dcx464 exit angle?
M. b. rotgg knows?))
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