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Sub $250 soundbars or 2.0/2.1 setups? - Page 2

post #16 of 24
Thread Starter 
Quote:
Originally Posted by billybob_jcv View Post

Sound is a wave, right? So, it has peaks and valleys. If you play a single pure frequency, the sound wave looks like a sine wave (just like an AC signal, because it *is* an AC signal). When you send the audio signal through a crossover, the components in the crossover (capacitors, inductors, etc) affect the phase. Each "order" of a crossover shifts the phase 90 degrees. So, a "2nd order" crossover will shift the phase of the sound by 180 degrees. That's the same effect as reversing the polarity of the speaker wire on the driver.

The crossover is not a hard cut-off between the woofer and tweeter. There is a slope to the reduction in signal around the cutover frequency. Anywhere that two speakers are operating at the same frequency, if they are 180 degrees out of phase from each other, they will be cancelling each other out. You can be creating holes in your frequency response that will sound weird. By ensuring the drivers are still in phase with the crossover in place, you avoid that weirdness and everything sounds right (or as right as it can!).

http://www.diyaudioandvideo.com/FAQ/Crossover/

Just to add a bit more, speaker design can be a VERY complex subject. Even something as simple as a crossover will make your eyes glaze over.
http://www.enjoythemusic.com/diy/0311/crossover.htm

Quite frankly, this is why most people just stick to very well known recipes for speaker designs. There are "cookbooks" of speaker recipes that you can find online or at Parts Express, Amazon, etc.
http://www.parts-express.com/cat/speaker-design-books/1524
Aw crap. I have a lot more research to do.
Hahaha
I'll probably get started with this book:
http://www.amazon.com/gp/aw/d/0966377346?vs=1#

That enjoythemusic link mentions a program called sound easy and its apparently not noob friendly.
A few people over at diyaudio reccomend lspcad for noobs and soundeasy for engineers.

http://www.ijdata.com/LspCAD_demo.html
Looks like I'll just have to use sleep mode on my computer (You can't save projects on the demo version.)

Thanks for the help.
post #17 of 24
Quote:
Originally Posted by zunehdrocks View Post


Aw crap. I have a lot more research to do.
Hahaha
I'll probably get started with this book:
http://www.amazon.com/gp/aw/d/0966377346?vs=1#

That enjoythemusic link mentions a program called sound easy and its apparently not noob friendly.
A few people over at diyaudio reccomend lspcad for noobs and soundeasy for engineers.

http://www.ijdata.com/LspCAD_demo.html
Looks like I'll just have to use sleep mode on my computer (You can't save projects on the demo version.)

Thanks for the help.

http://www.instructables.com/id/How-to-Build-Custom-Speakers/

This is also a good post on building speakers,btw i also have purchased the book you given on link right now

post #18 of 24
Thread Starter 
Quote:
Originally Posted by krishtrinity1 View Post
 

http://www.instructables.com/id/How-to-Build-Custom-Speakers/

This is also a good post on building speakers,btw i also have purchased the book you given on link right now

http://cdn.instructables.com/F1V/56YY/FGTW4RT4/F1V56YYFGTW4RT4.MEDIUM.jpg

That 

Is 

Awesome

post #19 of 24
Thread Starter 
Quote:
Originally Posted by zunehdrocks View Post


Aw crap. I have a lot more research to do.
Hahaha
I'll probably get started with this book:
http://www.amazon.com/gp/aw/d/0966377346?vs=1#

That enjoythemusic link mentions a program called sound easy and its apparently not noob friendly.
A few people over at diyaudio reccomend lspcad for noobs and soundeasy for engineers.

http://www.ijdata.com/LspCAD_demo.html
Looks like I'll just have to use sleep mode on my computer (You can't save projects on the demo version.)

Thanks for the help.


YASSSSSSSSSSSSSSSSSSSS

Twinsburg highschool is closed tomorrow (snow day!!!!!!)

post #20 of 24
Thread Starter 
Quote:
Originally Posted by zunehdrocks View Post
 


YASSSSSSSSSSSSSSSSSSSS

Twinsburg highschool is closed tomorrow (snow day!!!!!!)

Because I can't save projects on the demo version...

 

 

The L-pad was removed because I'm not sure how you set differences in sensitivity. Clearly a horrible layout but whatever

 

 

L-pad is connected

 

 

 


Edited by zunehdrocks - 1/9/15 at 11:44am
post #21 of 24
Thread Starter 
Quote:
Originally Posted by zunehdrocks View Post
 


YASSSSSSSSSSSSSSSSSSSS

Twinsburg highschool is closed tomorrow (snow day!!!!!!)

Another snowday.

School closed for tommorow.

post #22 of 24
Thread Starter 
Quote:
Originally Posted by zunehdrocks View Post

Well theres a few options for a speaker build
Small version a:
http://www.parts-express.com/parts-express-knock-down-mdf-004-cu-ft-micro-bookshelf-speaker-cabinet-pair--300-7060
http://www.parts-express.com/speaker-cabinet-port-tube-1-id-x-4-l-flared--260-470p
http://www.parts-express.com/vifa-tc9fd-18-08-3-1-2-full-range-paper-cone-woofer--264-1062
http://www.parts-express.com/dayton-audio-ptmini-6-planar-tweeter-6-ohm--275-083
L pad attenuation:6.5db
Bass port tuned at 80hz
Crossover: 2nd order linkwitz riley crossed at 4500

Small version b:
http://www.parts-express.com/parts-express-knock-down-mdf-004-cu-ft-micro-bookshelf-speaker-cabinet-pair--300-7060
http://www.parts-express.com/speaker-cabinet-port-tube-1-id-x-4-l-flared--260-470
http://www.parts-express.com/faitalpro-4fe35-4-professional-full-range-woofer-8-ohm--294-1124
http://www.parts-express.com/vifa-tymphany-bc25sc06-04-1-textile-dome-tweeter--264-1028
L pad attenuation: 5db
Bass port tuned at 80hz
Crossover: 2nd order linkwitz riley crossed at 3500hz

Small version c:
http://www.parts-express.com/parts-express-knock-down-mdf-004-cu-ft-micro-bookshelf-speaker-cabinet-pair--300-7060
http://www.parts-express.com/speaker-cabinet-port-tube-1-id-x-4-l-flared--260-470
http://www.parts-express.com/faitalpro-4fe35-4-professional-full-range-woofer-8-ohm--294-1124
http://www.parts-express.com/beston-rt001a-ribbon-tweeter--277-110
L pad attenuation:3db
Bass port tuned at 80hz
Crossover: 2nd order linkwitz riley crossed at 4000hz

Bigger:
http://www.parts-express.com/parts-express-knock-down-mdf-023-cu-ft-mini-bookshelf-speaker-cabinet--300-7062
http://www.parts-express.com/speaker-cabinet-port-tube-1-1-8-id-x-6-1-2-l-flared--260-472
http://www.parts-express.com/dayton-audio-nd25fa-4-1-soft-dome-neodymium-tweeter--275-059#lblReviews
http://www.parts-express.com/dayton-audio-ds135-8-5-designer-series-woofer-speaker--295-426
L pad attenuation : 9.1db
Bass port tuned at 60hz
Crossover: 2nd order linkwitz riley crossed at 2800hz

Bigger v2
http://www.parts-express.com/faitalpro-5fe120-5-professional-midbass-midrange-woofer-8-ohm--294-1141
http://www.parts-express.com/parts-express-knock-down-mdf-023-cu-ft-mini-bookshelf-speaker-cabinet--300-7062
http://www.parts-express.com/dayton-audio-nd25fa-4-1-soft-dome-neodymium-tweeter--275-059#lblReviews
http://www.parts-express.com/speaker-cabinet-port-tube-1-1-8-id-x-6-1-2-l-flared--260-472

Biggest:
http://www.parts-express.com/parts-express-knock-down-mdf-056-cu-ft-bookshelf-speaker-cabinet--300-7064
http://www.parts-express.com/parts-express-speaker-cabinet-port-tube-2-1-2-id-adjustable--260-386
http://www.parts-express.com/faitalpro-6fe100-6-professional-midrange-midbass-woofer-8-ohm--294-1150
http://www.parts-express.com/beston-rt001a-ribbon-tweeter--277-110
L pad attenuation: 3db (towards the woofer?!??!?!?!?!!!)
Bass port tuned at 42hz
Crossover: 2nd order linkwitz riley crossed at 3700hz

2nd order phase change: 180 degrees (reverse polarity)
Zobel circuit (between crossover and driver)

Are we missing anything?
Any advice/modifications?

awesome

http://www.zaphaudio.com/smalltest/

http://www.zaphaudio.com/tweetermishmash/

post #23 of 24
Thread Starter 
post #24 of 24

My new speaker and amplifier that i got used..monitor audio m2 and marantz pm5004,also planning to get NAD C320BEE and monitor audio radius 90 used

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