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post #901 of 1130 Old 03-27-2011, 07:00 AM
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some more projects
from left 1,Holographic covered, rebuild new design lighter etc
2,Rebuild using 23 um Mylar A.
3,Showing membrane with foil in place.
4,Right channel of 2.
5,Rear view.
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post #902 of 1130 Old 03-27-2011, 07:14 AM
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These are rebuilds of some of the ferrites I built 20 years ago. Apart from the last one, this is a underfloor loaded design I built even earlier. Used with others for watching dvd's in 5.1. infinite baffles, centre speaker and transmission lines
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post #903 of 1130 Old 03-27-2011, 07:24 AM
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A few more
The first 2 I use for sub woofers
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post #904 of 1130 Old 03-29-2011, 09:26 AM
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I've attached a picture of my HT speakers, of which I currently have six built and two more to go. They're quasi-line arrays using nine 3.5" full range drivers per speaker (these are the $8.00 closeout Aurasound copies that Parts Express was selling recently). The enclosures are basically a 5" CPVC pipe and the bases are solid walnut. Even though nine identical Aurasound type drivers are used, there is a frequency shaping network/xover also in each enclosure. The outer six drivers are rolled off to compensate for baffle step, and only the center driver handles HF info above about 5khz (which is accordingly boosted to match the lower frequency efficiency). So these speakers work more like vertically elongated point sources than conventional line arrays.

Due to the addition of activated charcoal in the enclosure and a "Vas reducing" polypropylene coupling capacitor at the input (600uF), my Audyssey MultEQ system measures these as responding down to 40-50 hz in my HT environment without any external EQ, no mean feat for an array of 3.5 inch drivers in a non-ported enclosure. And with the Audyssey EQ applied, it sounds like they make it down to near 20hz flat without any subwoofer in the system.

I suspect this approach has an inherent advantage over separate subwoofers because the bass for each channel originates at the same location as all the higher frequencies, hence there should be no imaging or delay problems caused by subwoofers that are located in only one or two places.

I've found that if I point the side channels at the walls, they effectively act as bipoles. MultEQ does a pretty good job of equalizing out the resulting response aberrations.

So, these speakers have exceeded my expectations for them. They can be placed almost anywhere without a stand, are not very obtrusive, work as either conventional direct radiators or bipoles, basically cover the whole 20 hz-20 Khz range when used with MultEQ, are very articulate and natural sounding and have decent dynamic range due to having 9 3 1/2 drivers per each with a healthy 4mm Xmax. Plus, I made them for a total material cost per speaker of about $150.00. Eventually I will get around to making perforated metal grilles to protect the speaker cones.
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post #905 of 1130 Old 03-29-2011, 09:51 AM
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Just finished up a pair of Overnight Sensations. It was my first DIY speaker project and I thought it turned out fairly well. I made them a little taller and less deep so they wouldn't stick out too far on my desk, and moved the port to the front so I could put them directly against the wall.

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post #906 of 1130 Old 04-14-2011, 03:17 AM
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My latest build.
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post #907 of 1130 Old 04-14-2011, 03:24 AM
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And the center channel:
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post #908 of 1130 Old 04-14-2011, 10:51 AM
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Quote:
Originally Posted by scomed99 View Post

And the center channel:

Very interesting.


Any details about this center channel? Driver mfrs, Xover freq, 2, or 2.5 way, horn/waveguide type/mfr?

------------------------------------
Flat, Deep, Clean, Linear, and Loud
------------------------------------
Active 16.8kw, 7.3 system
(3)Seaton Cat12C up front, (4)QSC K8 sides/rears
(2)Seaton SubM-HP, (4)18" IB
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post #909 of 1130 Old 04-14-2011, 05:12 PM
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Quote:
Originally Posted by FOH View Post

Very interesting.


Any details about this center channel? Driver mfrs, Xover freq, 2, or 2.5 way, horn/waveguide type/mfr?

+1

Looks pretty darn cool.
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post #910 of 1130 Old 04-14-2011, 11:02 PM
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2 way bass-reflex active system

xover 800hz
2x high efficiency pro 8" driver
1x 1" compression driver paired with 200mm exponential horn

in attachement you find the FR
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post #911 of 1130 Old 04-15-2011, 07:13 AM
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Quote:
Originally Posted by scomed99 View Post

2 way bass-reflex active system

xover 800hz
2x high efficiency pro 8" driver
1x 1" compression driver paired with 200mm exponential horn

in attachement you find the FR

Thanks, I wouldn't have thought they were reflex. If you could, I am interested in driver mfrs/models etc. That response is phenomenally flat...but at 50db? Hell, that's barely above the noise floor in my media room. With 3 custom PCs(w/fans), pro amps, kitchen fridge etc, there are quieter areas of our home What would you estimate the resulting sensitivity to be?

Does that amp possess dsp signal shaping/manipulation? I'm interested because what you have there is very similar to one of my shelved designs, however mine was 2.5 way...rolling off one LF driver at the top end. How would you characterize the sound?


Thanks

------------------------------------
Flat, Deep, Clean, Linear, and Loud
------------------------------------
Active 16.8kw, 7.3 system
(3)Seaton Cat12C up front, (4)QSC K8 sides/rears
(2)Seaton SubM-HP, (4)18" IB
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post #912 of 1130 Old 04-15-2011, 07:36 AM
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Quote:
Originally Posted by FOH View Post

Thanks, I wouldn't have thought they were reflex. If you could, I am interested in driver mfrs/models etc. That response is phenomenally flat...but at 50db? Hell, that's barely above the noise floor in my media room. With 3 custom PCs(w/fans), pro amps, kitchen fridge etc, there are quieter areas of our home What would you estimate the resulting sensitivity to be?

Does that amp possess dsp signal shaping/manipulation? I'm interested because what you have there is very similar to one of my shelved designs, however mine was 2.5 way...rolling off one LF driver at the top end. How would you characterize the sound?


Thanks

The woofer are Beyma 8G40.
The sens. of the speaker is 101,5db without room gain.
Mine is a dedicated room and is abolutely silent (no fan!)
The amp have on board a powerfull DSP with xover, delay, gain and 16PEQ per channel.
The plate amp have 500w for woofer and 250w for tweeter on 4ohm.
http://www.digmoda.com/

In my opinion the speaker sound great, with a very open sound, the voice are very good, always present and balanced.
With HT music they make the best, you know the "live" feeling?
Last but not least this center channel play loud, very loud. (as the front speakers )

Sorry for my bad english (I'm italian), but I think you understand.
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post #913 of 1130 Old 04-20-2011, 10:30 PM
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This thread is pure awsomeness!!!
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post #914 of 1130 Old 04-20-2011, 10:32 PM
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I just had 2 hours sleeping (night sleep) and still can't go to sleep (as normal persons)! I'm addicted already :O!
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post #915 of 1130 Old 05-06-2011, 01:27 PM
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Those are gorgeous. Good Job.
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post #916 of 1130 Old 06-12-2011, 01:42 PM
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post #917 of 1130 Old 06-12-2011, 03:24 PM
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Dont know why I've never looked at this thread before. These are the standouts for me (well done to all!):


















Peter the Greek

Downunder Theatre MkII
Redefining snail pace construction
"what is worth knowing is difficult to learn"

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post #918 of 1130 Old 06-13-2011, 08:28 AM
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Just put the finishing touches on these this weekend. The photo doesn't show the drivers with the proper allen bolts in them though. This was my first from scratch design. It's a very easy to build speaker that cost me under $200 including veneer



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post #919 of 1130 Old 06-19-2011, 01:12 PM
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Ok I may be out of my element here, but I would like to make a pair of my own subs. I do a lot of woodworking and "making" the cabinet is the least of my concerns. Besides I want my cabinets in cherry and there are not too many offerings in that wood.

I want to use a pair of the TC 5100's but what I don't know is how to design a cabinet for optimal performance. Just how does one get started in the design stage. I don't really want to do a lot of trial and error stuff as I don't have a lot of time on my hands, so maybe building is out of the question. I've seen books on "speaker design" (i.e. "Designing, Building, and Testing Your Own Speaker Systems" by David Weems) software like Bass Box Pro, but after awhile it all becomes a blur.

So like my opening statement says, am I out of my element here?
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post #920 of 1130 Old 06-20-2011, 05:27 AM
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Quote:
Originally Posted by DeBill View Post

Ok I may be out of my element here, but I would like to make a pair of my own subs. I do a lot of woodworking and "making" the cabinet is the least of my concerns. Besides I want my cabinets in cherry and there are not too many offerings in that wood.

I want to use a pair of the TC 5100's but what I don't know is how to design a cabinet for optimal performance. Just how does one get started in the design stage. I don't really want to do a lot of trial and error stuff as I don't have a lot of time on my hands, so maybe building is out of the question. I've seen books on "speaker design" (i.e. "Designing, Building, and Testing Your Own Speaker Systems" by David Weems) software like Bass Box Pro, but after awhile it all becomes a blur.

So like my opening statement says, am I out of my element here?

Suggest you start new thread with your stated goals, as this is the pic. gallery. I'm sure members will offer their help.
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post #921 of 1130 Old 06-24-2011, 09:43 AM
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Here's my Dayton TMWWs:




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post #922 of 1130 Old 06-24-2011, 10:14 AM
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Those are outstanding lcolbur1.

Do you have a build thread for these?

"Half the world is looking for Jesus, and the other half is looking for more bass..."
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post #923 of 1130 Old 06-24-2011, 11:42 AM
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Quote:


Do you have a build thread for these?

Thanks for the comment! I do actually:

http://www.htguide.com/forum/showthread.php4?t=38007
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post #924 of 1130 Old 06-29-2011, 12:27 PM
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Quote:
Originally Posted by Stinky Dragon View Post

Just finished up a pair of Overnight Sensations. It was my first DIY speaker project and I thought it turned out fairly well. I made them a little taller and less deep so they wouldn't stick out too far on my desk, and moved the port to the front so I could put them directly against the wall.


those look pretty good especially for your first time
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post #925 of 1130 Old 06-29-2011, 12:30 PM
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Quote:
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Dont know why I've never looked at this thread before. These are the standouts for me (well done to all!):





what veneer is that?
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post #926 of 1130 Old 06-30-2011, 07:24 PM
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what veneer is that?
Waterfall bubinga with medium figuring.
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post #927 of 1130 Old 07-05-2011, 02:41 AM
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New to AVS but i like it here

Haven't seen any tapped horn subwoofer pictures in this thread during my quick skim through. So I thought I'd share my monster




In my rather small bedroom for my completely overkill PC audio setup!


Could fit my head in there but not recommended during heavy bass


$50 Dayton SD315-88 12" driver.


Right at home.


~105db+ at listening position (126db at the horn opening!) with ~30watts. Fills my whole room (and house) with nice low bass down to 19hz. Great for movies and such but is still musical enough for well music. Very low distortion compared to my previous ported enclosure.

Didn't really bother making it pretty since it is nicely hidden away from sight.
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post #928 of 1130 Old 07-08-2011, 05:43 PM
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Thanks for the comment! I do actually:

http://www.htguide.com/forum/showthread.php4?t=38007

Awesome stuff.
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post #929 of 1130 Old 07-22-2011, 08:07 AM
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Quote:
Originally Posted by killa12222 View Post

New to AVS but i like it here

Haven't seen any tapped horn subwoofer pictures in this thread during my quick skim through. So I thought I'd share my monster




In my rather small bedroom for my completely overkill PC audio setup!


Could fit my head in there but not recommended during heavy bass


$50 Dayton SD315-88 12" driver.


Right at home.


~105db+ at listening position (126db at the horn opening!) with ~30watts. Fills my whole room (and house) with nice low bass down to 19hz. Great for movies and such but is still musical enough for well music. Very low distortion compared to my previous ported enclosure.

Didn't really bother making it pretty since it is nicely hidden away from sight.

thats a sick build but cant believe you did all that for a 12" sub?..lol..should have sprung for 15-18"....how does it sound? Post up a video on youtube and show it off dude..
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post #930 of 1130 Old 07-26-2011, 08:18 AM
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My new bedroom speakers. Active dipoles based on my Linkwitz inspired mains. Baffle is folded perspex, drivers are Seas W22 and 27TDFC. Crossover is a MiniDSP. They cross to a sub at 70Hz and sound as transparent as they look.
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