Suggestions for PA loudspeakers

[esun127]

I'm planning on selling some JBL eons that I bought off ebay not too long ago. They're lightweight and sound good for PA speakers, but I'd rather get something with more bass without having to get huge subs, because I have to transport this stuff.

I'm thinking about building a pair of 3-way speakers loaded with Eminence drivers. I want to use a Delta 12-LF driver for the bass, a Delta 10 for the mids, and either a PSD2002 Horn driver and horn, or an APT50 Super Tweeter. If I use the PSD, I will probably build a crossover with crossover points at 1600-2000 HZ and 500HZ or lower. If I use the super tweeter, the crossover points will be around 3500HZ and 500HZ.

I chose the Deltas because of the low Vas (2.7 cu ft for the 12" and 1.08 cu ft for the 10"). What do you think of this setup? Am I going in the right direction?

Also, what is a good website for designing a crossover for this application? I was thinking about just getting an Eminence crossover, but it's only rated for 400 watts, whereas each speakers will be receiving 450-550 watts RMS (from a Crown CE-1000 Power amp). Thanks for any replies!

[pinkmouse]

Unfortunately it is just about impossible to get low bass out of a small box...

You might want to think about getting the matching Eon subs, they ain't that big and obviously match well with the Eon top boxes you have

If you do want to go with new boxes, a 15" on the bottom would probably be better than the 12"

A passive crossover of that power will also be big, heavy and expensive, you might want to think about going active, at least for the sub/ mid crossover.

IMHO, if you like the sound of the Eons, I would just build your own sub, there are many good 15" drivers out there, and use another amp and a two way active crossover between them.

[mrfeedback]

It depends what type of PA sound reinforcement you are doing - this determines the power required and the low frequency response required.
Is this for party DJ, live bands, etc - what ?.
If you like the Eons, keep them and use them for 250 Hz and up - this will reduce their power input considerably.
Get an extra stereo amp for the lows, and build yourself some 4 ohm lows cabinets.
If you don't need sper lows, J-Bins can be quite lightweight, and efficient.

Eric.

[mrfeedback]

J-Bins like this I mean - Danctech.com ]
Use an electronic crossover, impedence compensate the woofer, add your Eons on top on a pole, and you should have all the sound you want.
Unlike W-Bins and bandpass Subs, these can sound clean and musical.

Eric.

[mrfeedback]

J-Bins like this I mean - Danctech.com page ]
Use an electronic crossover, impedence compensate the woofer, add your Eons on top on a pole, and you should have all the sound you want.
Unlike W-Bins and Bandpass Subs, these can sound clean and musical.

Eric.


Dancetech.com PA pages.

[IanHarvey]

I'd be tempted to go for a 15" plus a compression driver, it will end up much more portable than a 3-way box.

If you pick one with a relatively smooth HF roll-off, you may not need a crossover for it at all, just a high-pass filter for the compression driver. This will need a much lower power rating; as the tweeters generally have several dB more sensitivity than the LF units, you'll need some attenuation as well; this further reduces the power demands on the crossover.

Avoid 15" units designed for bass guitar rather than PA, they usually have a deliberate peak at 3KHz or so, for cabs which don't have a tweeter at all.

Passive crossovers at high power levels are hard to get parts for, and really hard to tweak. Bi-amping or tri-amping is much more normal at this sort of power level.

I'd also look at the 'recommended cabinet volume' on the datasheets, rather than Vas in isolation. Vas is only really meaningful in combination with the Fs and Q parameters.


Cheers
IH

[OMNIFEX]

Originally posted by pinkmouse
Unfortunately it is just about impossible to get low bass out of a small box...

Especially when your talking;

1. High Spl's

2. Not relying on room gain

3. Catering for 100 - 1000's of patrons

IMHO, if you like the sound of the Eons, I would just build your own sub, there are many good 15" drivers out there, and use another amp and a two way active crossover between them.

Bottom line, to have the proper bass requirements, your
best investment is to build a sub.

I wouldn't recomend the Scoop listed above though. You
will have better luck with a dual 15 inch box. The Scoop
only sounds acceptable if your using around 2 minimum,
where as a single dual 15 will do a better job vs a single scoop.