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Multi-Way Conventional loudspeakers with crossovers

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Old 15th April 2009, 11:36 PM   #11
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Thanks Eric. Yes, if you find them on a good day, the q component guys are good. Glad you had a good experience. Can he do the XO also?
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Old 16th April 2009, 12:41 AM   #12
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Hi Cal,

This must of been one of these good days, yes, they can do the X-Over also. (probably one from Eminence; plug and play)

Regards,
Eric
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Old 16th April 2009, 01:04 AM   #13
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Well, if it has to be premade, at least it's by the driver maker.

Cheers.
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Old 17th April 2009, 10:53 PM   #14
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Hi,

Here is the proposed design by q-components;

Driver ;

LF : McBride VHP1200 (made by Eminence for Q-Components) 12 inches woofer which will thump more than the Eminence Beta series.

HF: Bullet tweeter, model Eminence APT150

XO will be the ones from Eminence model PXB2:3.5 which is 12db/oct for the woofer and 18db/oct for the tweeter XO at 3.5KHz, XO comes with bulbs to protect the tweeter. Eric at Q-Components did a freqency sweep and the woofer goes up to 4KHz +- 1db.

Vented cabinet to be 3.6 cubic feet with f3 = 43Hz and f9 at 33Hz (why was he telling me about f9...)

Considering the price of the drivers (60 for woofer and 50 for the APT I think I should add a mid or maybe a PSD2002 (compression horn driver) crossed at around 1.6KHz...does did make any sense.

So, any comments before I place my order...

Thanks in advance,
Eric
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Old 17th April 2009, 11:30 PM   #15
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Hi Eric,

I think if they offered you a 3.6 cu ft enclosure, a 12" woofer, a bullet tweeter and a premade 3.5 KHz XO we might want to rethink this. 3.5K is too high for a 12" unless your ears are not sensitive to cone break-up.

I don't have much time tonight as hockey dominates this time of year but if you are going 3 way, you might as well go for a 15", a 6" and a bullet. Problem is the XO. You might wish to look for a kit with the wiring already figured out. Either that or revert to the idea of the Tapco Mackie's. I hate to say it being a speakerholic but they are starting to look good.
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Old 17th April 2009, 11:49 PM   #16
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I too would advise to think twice
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Old 18th April 2009, 12:23 AM   #17
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Hi,

It is kinda of big enclosure for a single 12 inch driver, my HT sub is only 1 cu ft.

The problem with the Mackie is that the price is PER unit therefore about 800 CDN for a pair.

Is there any kit available with pro drivers ??

This is not looking very good except so far unless I go with a compression horn tweeter XO at about 1.6KHz.

Thanks for the helps guys.

Regards,
Eric
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Old 18th April 2009, 03:38 AM   #18
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Hi,

How about using a pair of FE206E for the mid and HF, I have a pair sitting at home or a pair of JBL LE8TH (also sitting at home) that nobody bought on this forum.

I'm not to thrilled about OB but what about putting these drivers in a sealed enclosure with a HPF at about 300Hz. I can not verify if the Xmax of the 206E would be exceeded, I have no software for this.

For bass I think I would stick to my original idea of Eminence Delta 12LTA or Delta 15LFA.

Does this sound like a good idea.

It may seem that I'm changing my mind but all I want is a pair of efficient speaker that will produce a tight bass (thump) with nice mids and Highs. I always find that PA speakers only have bass and highs, the mid always seems like they are missing .

Thanks for any advice.

Regards,
Eric
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Old 18th April 2009, 03:45 PM   #19
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Quote:
Originally posted by e_fortier
Hi,

For bass I think I would stick to my original idea of Eminence Delta 12LTA or Delta 15LFA.

Does this sound like a good idea.


Dont know those, but I think the Delta12LTA, as you call it, is BETA 12LTA

Beta12LTA and Delta12LFA are totally different drivers

Beta12LTA is a widerange with whizzer cone and said to be ok
Whether its good fore loud SPL I cant say
But I doubt it will have the chest pounding bass you ask fore

But I would maybe try it in a 2.5way
That would need 2x Beta12LTA each side, and some kind of tweeter
maybe even your Fostex 8" crossed relatively high
2.5way means that both woofer play the same bass, but one is crossed with a single series coil somewhere around 500hz fore this

But how to make the crossover ?

Have had an idea with 4x Beta8 with a tweeter in 2.5way, but probably no chest pounding from that one neither
Though someone said here that the Beta8 sound nice even with no xo
Which means that it might be quite easy to cross it to a cheap PA tweeter

Or maybe something with a real tough big fullrange, but they cost money, but maybe P.Audio have something
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Old 18th April 2009, 04:49 PM   #20
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Hi,

You said; Beta12LTA and Delta12LFA are totally different drivers

You are correct I meant to write Delta 12LFA.

Do you think I can get the chest pounding bass feeling with a single Delta 12LFA or 15LFA per cabinet.

I want to avoid if possible using 2 woofer per cabinet because I need 8 ohm load (my Class D amp is in bridge mode, it is a TDA8920BTH from Philips that I bought at Connexelectric.)

Thanks again for the help ;-)

Eric
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