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Old 28th July 2006, 09:36 PM   #11
Jiggity is offline Jiggity  United States
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Your probably right sdc, a tried design would remove alot of headaches down the line, and since this will be my first total construction it will present its share of challenges. One problem though, all of the MTM designs ive seen use 8ohm dayton classic woofer in parallel and some 4 ohm tweeter. My reciever doesnt really like impedances below 8, 6 at the lowest. so I wanted to use two 4 ohm dayton woofers with the 8 ohm silk dome to give me the 8 ohm load that I want.

I dont know how easy it would be to change one of those designs to fit my needs, and if anyone can point one out I would appreciate it.

Thankyou for all your help
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Old 28th July 2006, 09:50 PM   #12
tinitus is offline tinitus  Europe
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Did I read that you like to play loud

I dont know why I like them, as I have never heard any of them

But StudioSeries is damm cheap - could be a good start

http://pispeakers.com/Prices.htm
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Old 28th July 2006, 10:25 PM   #13
soufiej is offline soufiej  United States
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I agree with the last post. As a beginner, use a proven concept and realize it represents what the designer wished for. That doesn't mean it will necessarily suit your tastes. After you've listened to the system to assess its values, both good and bad, try tweaking the curcuit to suit your taste. I think you'll learn more by working with a good base line product and hearing what changes occur when you make alterations. And, you will always have the original design to fall back on and compare to as you learn.
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Old 28th July 2006, 10:35 PM   #14
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Quote:
Originally posted by Jiggity
Your probably right sdc, a tried design would remove alot of headaches down the line, and since this will be my first total construction it will present its share of challenges. One problem though, all of the MTM designs ive seen use 8ohm dayton classic woofer in parallel and some 4 ohm tweeter. My reciever doesnt really like impedances below 8, 6 at the lowest. so I wanted to use two 4 ohm dayton woofers with the 8 ohm silk dome to give me the 8 ohm load that I want.

I dont know how easy it would be to change one of those designs to fit my needs, and if anyone can point one out I would appreciate it.

Thankyou for all your help
TA DAA!! http://www.partsexpress.com/pe/pshow...number=295-308

Just wire in series.
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Old 29th July 2006, 09:09 AM   #15
Jiggity is offline Jiggity  United States
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Yes those were the drivers that I wanted to use, I was just wondering if it was as simple as just using a proven MTM crossover design and running them in series instead of parallel. It seemed almost too simple and I didnt know if I would run into some unforseen problem.

Thankyou
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Old 29th July 2006, 12:17 PM   #16
tinitus is offline tinitus  Europe
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I have to say that if it were that simple, everybody could make good speakers - from time to time I cant help thinking that there often is a pronounced lack of respect when people think its that easy

I have nothing against your urge to design your own, and theres enough people advising against it
Funny how in amp building its the other way round, where a true DIYer is expected to have burned fingers regularly, and kit building is not considered as true DIY - well enough said

The woofers you have chosen are I think not so good with its dips and peaks - allthough it being a papercone I reckon its related to its deep and flat conical cone shape
If you really must do your own, you have to choose a driver that has a smooth frequency that allows fore a simple and high crossover point

And please dont use some standard crossover
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Old 29th July 2006, 02:49 PM   #17
tinitus is offline tinitus  Europe
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I have missed that you have a subwoofer

So why make MTM with double mid, you should have no need for that and it only complicate things

You could make a nice speaker with a widerange driver and maybe a supertweeter with high crossover point

I think you could have fun with that
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Old 29th July 2006, 03:24 PM   #18
tinitus is offline tinitus  Europe
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I think theese look interesting


http://www.tb-speaker.com/detail/1208_03/w6-658a.htm

http://www.tb-speaker.com/detail/1208_03/28-1177s.htm


Or you can make theese for about 100USD a pair

http://www.zaphaudio.com/audio-speaker13.html
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Old 30th July 2006, 12:18 PM   #19
sreten is offline sreten  United Kingdom
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Hi,

Unusual a HT reciever doesn't like anything less than 8 ohm loads.

If a subwoofer is always going to be involved then sealed box
loading is the way to go, the boxes will be ~ 1/2 the size of
the equivalent reflex, and this in the end = better quality.

Personally I prefer MTs over MTMs, especially for music, though
for bombastic (as opposed to subtle) HT MTMs can be somewhat
more immediate (if less accurate).

Note that with most designs once the tweeter is level matched
via a series (and possibly parallel) resistor the impedance in the
treble should not be low, you should only have to worry about
the impedance in the bass area of the speaker.

Loud volumes are a function of the size of your room, amplifier
power and speaker sensitivity. Sensitivity is related to the amount
of bass extension for the box size. If a sub is always involved
then you can swap sensitivity for bass extension.

http://www.zaphaudio.com/audio-speaker19.html

Is a very good 8 ohm speaker for use with a subwoofer, and
also a very good first project. If they end up not being loud
enough you can use them as rears. There is also enough info
in the article to be able to build and compare 3dB BSC and
full BSC (with 3dB IMO you would need near wall mounting).

/sreten.
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Old 31st July 2006, 12:07 AM   #20
Jiggity is offline Jiggity  United States
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Thankyou for all of your input, I will take your advice and build a basic 2-way woofer/tweeter (not MTM). It might not be that exact one but I will base it off a proven design, and if I like them enough Ill just make 4 of them for the surround sound, take my old ones and use them to tinker with to perhaps learn some more.

Thanks again for all of your input, it might be a while before I actually build these, I have to go back to school, but when I do ill let you know how they turned out.
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