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T O P I C    R E V I E W
wasssup1990 Posted - Apr 23 2009 : 04:12:24 AM
Hello everybody,
I want to get more involved into audio. You can assume that I am a newbie. The goal of this project is to make a "Home Made Digital Surround Sound Speaker System" "Home Made Advanced Digital Home Theater System" I will be posting my progress on this project as time time goes by. Sometimes I may need your valued and experienced opinions on certain things, so therefore I will base this thread as the hub of this project. Feel free to post your own resources, I will add them to this first post if they are relevant.

This first post will contain resources I will be referring to. I will add important info to this first post. If I refer to a particular resource you can always find it in this post.

Features and Specifications (There are still uncertainties with this):

  • Highly configurable sound system.


  • Wireless surround speakers have their own Class D amplifiers. Note: Another approach is being devised.


  • Surround speaker units are 3-way and bi-amped (maybe). Passive crossover between mid-range and tweeter if bi-amped.


  • The ability to use audio DSP to enhance the audio and adjust delays and frequency spectrum amplitudes etc.


  • Use a modified low-profile x86 architecture processing platform for processing of sound and to provide media playback facilities.


  • Digital Inputs:
    Four pairs of S/PDIF audio inputs, both RCA and Optical data links per pair.

  • Analog Inputs:
    Four pairs of RCA audio inputs. Assignable. for: FL FR SL SR RL RR CENTER SUBWOOFER per set


  • Power requirements to head unit:
    100VAC to 250VAC, 50-60Hz with a fused C14 chassis socket.
    *-Head unit should pass less than 50W.

  • Power requirements to subwoofer:
    100VAC to 250VAC, 50-60Hz with a fused C14 chassis socket.

  • Power requirements to surround speakers:
    100VAC to 250VAC, 50-60Hz with a fused Unpolarized C7 Line Connector.

  • Surround sound speaker units and subwoofer unit(s) are expected to be far away from the head unit. Each surround sound speaker unit contains a small efficient SMPS, subwoofer unit(s) as well. Surround sound speaker units and subwoofer unit(s) acquire their sound data via a digital link RCA connector on the back face of the unit which connects to the head unit. This method means that theoretically unlimited numbers of speakers can easily be assigned to a each channel for boosted loudness for large rooms.



Resources/Research:
http://www.smps.com/Knowledge/MOSFET_Switching/FETsw_p1.shtml
http://www.epanorama.net/documents/audio/spdif.html
http://sound.westhost.com/articles/pwm.htm
spdif.zip 13.33 KB
subwoofer_big.jpg 42.3 KB
images-details-truesubwoofereqsigpr.jpg 107.62 KB
Alpine_Swx_1242d_12_3000w_Dual_4_ohm_Subwoofer.jpg 17.73 KB
Polk_Audio_PSW10_subwoofer.jpg 35.34 KB
subwoofer-Pioneer-TS-WX301.jpg 38.33 KB
15   L A T E S T    R E P L I E S    (Newest First)
wasssup1990 Posted - Sep 26 2009 : 08:34:33 AM
wasssup1990 Posted - Sep 24 2009 : 5:45:21 PM
Ah I see. I noticed the huffy puffy thing with my 5.1 Logitech bass speaker which has a port on the front.
audioguru Posted - Sep 24 2009 : 1:35:42 PM
quote:
Originally posted by wasssup1990

Question,
Is it generally better for sound reproduction to have a port on the back-side of the speaker enclosure?

A port makes huffing and puffing noises when the power level is high. The noise is muffled when the port is on the back side of the speaker.
wasssup1990 Posted - Sep 23 2009 : 11:12:38 PM
Question,
Is it generally better for sound reproduction to have a port on the back-side of the speaker enclosure?
wasssup1990 Posted - Sep 23 2009 : 05:35:32 AM


Download Attachment: My Work 23.09.2009.jpg
202.11 KB
wasssup1990 Posted - Sep 23 2009 : 04:50:10 AM
The latest pictures seem to be offline. Hopefully the server problem can be fixed soon (out of my control).

I have updated the first post. Features and Specifications have been modified.
wasssup1990 Posted - Sep 20 2009 : 12:41:32 AM
wasssup1990 Posted - Sep 19 2009 : 05:49:30 AM
wasssup1990 Posted - Sep 18 2009 : 9:27:33 PM
What? Works fine on my computer. I'll re-link my last picture to another server.

Edit:
Ah I see.
audioguru Posted - Sep 18 2009 : 2:22:16 PM
Today's picture doesn't work.
wasssup1990 Posted - Sep 18 2009 : 11:32:15 AM
wasssup1990 Posted - Sep 14 2009 : 12:27:46 PM


Download Attachment: NameReleased15.09.09.jpg
134.6 KB
wasssup1990 Posted - Sep 14 2009 : 10:15:08 AM


Download Attachment: Foot.jpg
167.26 KB
wasssup1990 Posted - Sep 14 2009 : 10:06:27 AM


Download Attachment: WholewithfeetReleased15.09.09.jpg
191.21 KB
wasssup1990 Posted - Sep 14 2009 : 08:41:46 AM


Download Attachment: WholeReleased14.09.09.jpg
169.88 KB

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