View Full Version : PA system...

10-16-2005, 05:19 AM
Ok guys be patient with me because this is my first venture into speaker design/ outside of car audio. I felt like designing a PA system for my friends band, and this is kind of what I came up with:
Amp: Dayton PMA250
Woofers: Dayton RS180S-8's
Tweeter: Horn

Now what I was thinking of doing is making two different cabinets, each with 2 7" drivers and one tweeter, and then building the amp in to one of the cabinets. I should be OK with one of those amps, correct? Any and all input is greatly appreciated, if I should go with larger drivers or whatever please let me know!

PV Audio
10-16-2005, 02:14 PM
i'd use at least a 10 or 12 pro audio driver instead of those RS. it'll stab me in the heart everytime u play 'em :(

93 saturn sl2
10-16-2005, 03:27 PM
Yea...for a band you'll at least want a 12"

10-16-2005, 09:39 PM
I'd make one of these but add a center horn tweeter and make a seperate woofer box.

PV Audio
10-16-2005, 10:06 PM
lol i don't think everyone is ready for that thy

10-16-2005, 11:57 PM
lol i don't think everyone is ready for that thy

I can visualize a death metal growl broadcast on a two stack NSB array punishing
the the peeps.... :evil:

10-17-2005, 12:47 AM
so even if they just want to use this for vocals and they already have amps for guitars and the bass, it still would be a bad idea to use those 7" drivers?

PV Audio
10-17-2005, 01:02 AM
i wouldn't use them. remember, you are needing to make LOTS of sound, for LOTS of people. you need LOTS of displacement to do that. thus, there are 18" woofers and 12" mids for PA which you generally don't see in hifi setups. and the RS is too beautiful to throw in a cage anyway :)

PV Audio
10-17-2005, 01:02 AM

10-17-2005, 02:37 AM

That's a good no non-sense design. Driver cost for that system is $200 per box.

The Dayton midrange idea is just too whimpy for a band, the vocals would
get drowned out pretty bad. Even that smithereen system would be barely
adequate if the guitar player likes to play loud and if the guitar player is using
more than a single 12", forget it, he's drown out the voice. Most bands lack vocal authority and get
drowned out by instruments. Ever been to a concert where you understood the
words sung? // hehehehe //

The NSB line array idea has interesting benefits for less driver cost but
involves more labor.

We already have one guy who compared the NSB array to the $2000 Bose PAS
system and they think it's an awsome alternative and the system was tested
live with great results => and he didn't even use a tweeter on the NSB array,
he did use an active crossover and EQ that was standard gear for this rig.

A two tower '8 driver NSB's array' stacked on top of each other is $24.
49 cent per driver + shipping = ~ $24 experiment. Get some cheap plywood
and make a small tower and if you don't like it, you didn't spend tons of cash on
it. Worse case, you can sell the system to another band and profit off the deal.


Two stackable towers to make transportation easy, nobody wants to haul
around a single 16 driver tower so you make two 8 driver towers so they
fit in a truck.

Sensitivity is 95dB.

Two tower 16 driver NSB array
8 ohm wiring = 98dB sensitivity.
2 ohm wiring = 104dB sensitivity

A tall line array loses less SPL over distance vs. the point source so
the NSB array will appear to be louder over a greater distance and it
will sound cleaner, an army of 16 4" drivers sound amazing, don't let the
small size fool you :)

It's alot of work though to cut 16 holes and make the NSB's fit nice.

The line array idea has upgrade potential. Not loud enough? Spend another $24
to make another tower, spread them out or place them close to each other - a matrix array. :) ,
add another 3dB to the sensitivity specs.

PV Audio
10-17-2005, 01:59 PM
i swear i learn something worthwhile from every one of your posts

10-17-2005, 05:04 PM
Cannibal Corpse inspires my speaker ideas.


What a sound system should do is akin to their song names;

An Experiment In Homicide
Relentless Beating
Shredded Humans
Put Them To Death
Scattered Remains, Splattered Brains
Bloody Chunks
Covered With Sores
Rancid Amputation
Innards Decay
Stripped, Raped And Strangled
Devoured By Vermin
Puncture Wound Massacre
Eaten From Inside
Savage Butchery
Dormant Bodies Bursting
Compelled to Lacerate
Hung and Bled
Mutation of the Cadaver
Frantic Disembowelment

.. and after there is Nothing left To Mutilate,
you ****** Through Torture

My audio recipe... sssshhhhhh....

:wacky: :peace:

... and do you know what is sick ? -> :sick:

I've been planning such a system for years :evil: .. I'm still collecting drivers ... :)