Scoops ? Horns ? Sub's ? WHAT!!?!?!

[darkm4n]

And in Salsa disco are 4 simple reflex sub's ( FBT brand ) that shake the dance floor ... they are not put in stack's .. they are putted in corner's .. and under a table .

Mabye if i build 4 good sub's and chage the driver on the scoop i can make a good system ...

Scoop at base , 2 x bass on top and the HF Cab , the same on the other channel .

What do you think ?

[mgoedeke]

If you are in Bulgaria, you should definitely look into Oberton speakers. Look at www.egbeck.de for the California Horn (click on Akustik on the top of the main page), which according to some posts on paforum.de have been known to work very well with one of the Oberton 15s (unfortunately the search function of the site doesn’t work at the moment, but it is supposedly very similar to the EV15L which was originally used in the BEC1). A stack of 4 of these is known to be very impressive and the horn is a little easier to build than the LAB because it doesn’t have compound angle mitres. Otherwise a double 18 with the 700XB (12mm Xmax) would be quite impressive as well.

[Cal Weldon]

Originally posted by darkm4n
( for the selenium driver ) and search at product's the WPU line , and then you'll see the
WPU1505 / WPU1505-SLF* Woofer MCS®

I currently use the WPU 1507 QCF in the Altec A7 cabinet. The 1507 is almost the same as the 1505 but has the near indestructible cone and is quite a stable sounding unit at higher volumes. Along with a 511 horn, that is the full range part of the system. For added bass I have a dual 15 set up in A4 cabinets.

I am running the full range with a Hafler 500 and each of the big bass units is run from a Carver cube. That's only a total of 1500 watts but it would certainly fill a dance club OK just because of the efficiency (or is it sensitivity?) of the system.

Now I don't use these for doing PA work, that's not my business, I just use it for parties. My friends don't care about the lack of deep deep bass, as long as they can hear it from the bocce pitch.

I've not heard too much from others about the Selenium woofers but I know the tweets are popular. I certainly believe I got good value for my money.

If others have used the Selenium woofers in other set ups, I'd like to hear about their experiences because up till now I feel kinda lonely. Nobody to compare notes with if you know what I mean.

Bye for now,

Cal

[asauer]

Imix500-
I wouldn't say that low power destroys speaker at all- low power is healthier for a speaker than more power than what the speaker is rated at. The major problem introduced is distortion . A 100W amp powering a 200W speaker is completely fine for the speaker, unless the amp is driven into clipping...THAT is where problems arise.
On the same note, a 300W amp is alot harder on the said speaker than the 100W amp, given that the user has common sense and does not clip the 100W amp.
Heat and/or mechanical failure kill speakers...
a clipping amp causes DC-like conditions, therefore builds up heat in the speaker...
Overpowering builds up heat in speakers, and can also cause mechanical failure via over-excursion...

Pick your poison.

[imix500]

Asauer, the idea that underpowering is harder on speakers is true, under the conditions that the user is trying to get full output from less than adequate power, which is very common. You can ask too much of an amp and gain a few more dB from doing it, but yes, you do get distortion, which is what destroys voice coils. The output power of an amp obviously limits the output of a given speaker, given that the speaker can handle the maximum output of the amp. If the speaker has a sensitivity of 100dB 1W/M, tripling the output power of the amp will give you 9 dB of sound pressure, obviously. It is ALWAYS a good idea to at least match amp ratings to speaker ratings- but more often a larger amp is used in order to easily handle transients. These transients can easily exceed maximum power ratings, but occur too fast to affect the temperature of the voice coil. Also if the speaker will be run at near full output it is very common to use a slightly larger amp to gain a reserve of thermodynamic energy- cooler running amps last longer. And when your paying $3500 for an MA5000, it makes a difference. All this is assuming the user knows how to responsibly run a system and has a good understanding of what it can and CANNOT do. Ignorance is far more dangerous than power.
-Ricky

[Cal Weldon]

Imix,

Methinks I agree. That's why my 500 watt woofers suggest an amp of 1000 wpc. Full use of the driver's ability, no clipping.

Happy Cranking.

asauer,

You are correct in your thinking but Imix is taking the thought a little further.

Happy Cranking also.

Cal

[asauer]

Ahh, I see what you're getting at.
When I read your first post I thought you were one of those people that says small-wattage amps ALONE can kill speakers- not distortion, that just lower power than what the speaker is rated for...believe it or not I have ran into those people. Doesn't make sense...seeing as you can turn the volume down on your TV and your speakers don't blow up since "you're running less power than the speakers are rated for."
But yes, I agree, having a bigger amp than needed is always a + if you can afford it, and dont, in turn, crank the gain up on the amp and really overpower the speaker.

[imix500]

Asauer, Amen to that! Heh, if the idea that lower wattage amps could toast speakers in that way was true, the entire tube audio world would implode!

[Bull]

to Darkm4n build scoops u wish to move around only out of 18mm plywood [baltic birch 13 ply 18 mm] plywood being one of the best.Normal 18mm ply is fine 2 if heavily braced.
If it never leaves the house use 18mm MDF.

For the drivers the Eminence Kappa Pro 15 LF 600w rms is good in scoops,because my m8 who does large discos uses them in his 15 inch scoops.
The non-pro version Eminence Kappa 15 LF 500w rms might also work in scoops,but not sure.

To power them use something like a QSC RMX2450 500w rms into 8 ohm per chan.Or the Peavey S1000 amp for £350 if u can't afford the QSC for £500 quid.

The speakers u are using in the scoops look like very cheap car subwoofers,which will sound crap and probably burn out too.

The cheapest driver you could put in scoops without it sounding bad would be the Eminence Delta 15 400w rms or P. Audio SM15

[Bull]

heres da speaker u should use