My first speaker build. looking for most bang for the least buck :) - AVS Forum
DIY Speakers and Subs > My first speaker build. looking for most bang for the least buck :)
phatfreeza's Avatar phatfreeza 06:59 PM 10-11-2013
Hi everyone, this is my first build so please go easy on me tongue.gif

I've been talking to fellow AVS member Scott Simonian and he encouraged me to make this thread. Here's the setup:

I'm in charge of bringing in a sound system into a classroom lab. the dimensions are roughly 25x30x15.

I want to build a 2.0 system to begin with and then possibly add a subwoofer in later. The speakers will be mainly used for music and videos.

Here are the constraints:

$300 budget
-size or shape is no concern (however the easier it is to place/mount the better)
-build quality or finish doesn't have to look great
-doesn't have to reach home theater reference quality but am looking for best bang for the buck

I have an uncle that has a table saw and other power tools so I have access to that. I'd prefer to not get too crazy with the build process so the simpler the better. Scott recommended the following to start with:


(2) - http://www.parts-express.com/pe/showdetl.cfm?partnumber=290-504
(2) - http://www.parts-express.com/pe/showdetl.cfm?partnumber=290-530
(2) - http://www.parts-express.com/pe/showdetl.cfm?partnumber=290-636
(2) - http://www.parts-express.com/pe/showdetl.cfm?partnumber=260-309


What do you guys think? We were talking about making a sealed box would be the simplest. How would I go about making a box for this? Thanks everyone for looking. Please let me know if I need to put more information up.

LTD02's Avatar LTD02 08:11 PM 10-11-2013
http://www.musiciansfriend.com/pro-audio/peavey-pr-12-speaker-pair

12% off this weekend makes it $300 for a pair.

done.
LTD02's Avatar LTD02 08:14 PM 10-11-2013
phatfreeza's Avatar phatfreeza 11:03 PM 10-11-2013
Quote:
Originally Posted by LTD02 View Post

more reviews at parts express: http://www.parts-express.com/pe/showdetl.cfm?partnumber=248-829

Thanks for the link! I was hoping to build a pair of speakers though
LTD02's Avatar LTD02 12:58 AM 10-12-2013
i know...

the problem is that a cheap kit: http://www.diysoundgroup.com/waveguide-speaker-kits/karma-series-kits/karma12-kit.html

costs more than the cheap speaker.

and putting a good speaker in that room isn't going to sound good anyways.

with those bare walls and floor, the reflections will never die down. acoustic panels on the walls would be a good diy project for that room.
LTD02's Avatar LTD02 01:01 AM 10-12-2013
have a listen to this video comparison of a "live room" like you have there and a treated room.

play the video a couple of times. the sound during the first part that sounds like rain on a tin roof is all the reflections bouncing around everywhere. your room will have that effect too.

http://www.youtube.com/watch?v=m6PMchgv2C4
FOH's Avatar FOH 09:01 AM 10-12-2013
+1 on the room's acoustic treatment

That space screams for treatment, and clearly such treatment/or lack thereof, is the dominant component impacting sound quality in that room.


Regarding loudspeakers, yeah a current pro type budget offering does represent huge value, but I understand the compelling reasons to DIY too. Whatever loudspeaker approach you pursue, will sound unintelligible unless you address the acoustics.
Scott Simonian's Avatar Scott Simonian 08:47 PM 10-12-2013
Heheh. Every room will need some acoustic treatments....

We gotta get him some speakers first though before we treat them. wink.gif
Eliaskil's Avatar Eliaskil 09:06 PM 10-12-2013
Quote:
Originally Posted by phatfreeza View Post


Thanks for the link! I was hoping to build a pair of speakers though

+1 Whatever loudspeaker approach you pursue, will sound unintelligible unless you address the acoustics.EoRNcTacoustic panels on the walls would be a good diy project for that room.


LTD02's Avatar LTD02 09:49 PM 10-12-2013
if you don't like scott's idea...ride the econowave!

http://audiokarma.org/forums/showpost.php?p=1675101&postcount=1
LTD02's Avatar LTD02 10:18 PM 10-12-2013
scott's idea isn't too bad either. that coaxial is also on sale for $57 http://www.amazon.com/Eminence-Beta-12CX-12-Coaxial-Driver/dp/B000BBF43Q
LTD02's Avatar LTD02 10:29 PM 10-12-2013
2.0 cubic feet stuff with polyfill or fiberglass medium heavy

100 watts, 2 pi conditions. actual in room response should be flat to somewhere around 50 or 60hz depending on placement.

ideally they would be placed in corners up near the ceiling and aimed roughly at a person sitting in the middle of the room.

as a sealed design without a lot of xmax, they aren't designed to pump out def beats of bass, but should do just fine with drum kicks for most music at what most folks would consider medium-loud levels.

nice idea scott. i still think the peavey's would outperform, particularly bass side, but where's the fun in that?


FOH's Avatar FOH 07:57 AM 10-13-2013
Quote:
Originally Posted by Scott Simonian View Post

Heheh. Every room will need some acoustic treatments....

We gotta get him some speakers first though before we treat them. wink.gif

You're right
FOH's Avatar FOH 08:01 AM 10-13-2013
I'd either mount them up in the ceiling/front wall junction, with relatively tight pattern control. Or, A/V cart them, with an eye on critical distance, and keeping overall levels down, listener to speaker distance short, subjective levels and impact up.

Problem is, portability is ok, but opens up a can of worms; damage, set-up inconsistencies, theft, etc ..
Scott Simonian's Avatar Scott Simonian 12:56 PM 10-22-2013
Hey, Jorge. How is this going?

Order anything yet?
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