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Old 6th January 2009, 07:56 PM   #1
Hugo82 is offline Hugo82  Netherlands
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Default First DIY - Fullrange on a €100 budget

I'm new to the world of DIY, always found it interesting but never really got into it due to various reasons.
I really would like to get into it and probably the best way is to start small with a complete design rather then starting from scratch designing my own.
What i would like is to start with is a compact design that uses a fullrange driver.

I'm looking for some suggestions keeping the following in mind;

My budget would be around €50 per speaker so +- €100 in total (about $135) for the components (not including cabinet and finish)
I will be using them as replacement for my pc speakers hooked up to a marantz amp that delivers about 35-40w. so they have to be able to take a bit of power.
At first i was looking at this 3" setup at Zaphaudio but something like that is a bit underpowered at 15w
A decent bass would be apreciated but it doesnt need to be earth shattering wich i'm sure would be impossible with fullrange drivers
Not too big, the Cyburg Needle and various like it pop up alot but they are too big/high.

Any suggestions would be much apreciated.
Preferbly complete designs for cabinet and crossover.

Cheers
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Old 6th January 2009, 08:15 PM   #2
Henkjan is offline Henkjan  Netherlands
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ha nog een landgenoot

for near the PC I would advise a FR speaker, but with the small budget and small size I doubt if you can find anything decent that can handle more power... but I don't think you'll need it, just use the volume knob wisely

I have made a TL version of the CT222 design (this is with the Omnes Audio BB3.01, there is a thread here and on zelfbouwaudio.nl ) which will give at close range an amazing bass, also have I seen (on forum.zelfbouwaudio.nl) a desktop TL design with the Tangband W3-871 (called pico tango)

of course the desktop TL I made with the new Markaudio Alpair5 would also be nice, but this goes above your budget
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Old 6th January 2009, 08:19 PM   #3
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So your PC speakers are hooked up to your Maranz.

Is your goal better PC speakers or for more general use such as home theater or the yet more refined disc and record playing systems?

I use my solid state Yamaha RP U100 made for the computer desktop to do all media functions including webcast of music, over the air FM
and media files.

I can't answer the question on power directly. Just my answer to get the crew going here for a new user.

You will be surprised at the amount of sound you will get that comes out of these discussions.
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Old 6th January 2009, 09:43 PM   #4
Hugo82 is offline Hugo82  Netherlands
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My goal atm is to just take my first steps into the world of DIY.

I was originally thinking of making a pair of Paper Hatt's but i think for a first DIY project it's a bit too much.
So i thought building a small FR set of speakers was a nice start and a good excuse to get rid of the shabby 5.1 set i have hooked up to the pc now..... it's decent for games but not for music.
I don't have that 5.1 set hooked up to the old marantz amp but directly to the soundcard on the pc.

Can i hook any speakers i build directly to the soundcard with the apropriate connectors or do they need some external amplifying ?
A lower powered FR speaker would also be good if the soundcard can provide enough juice.

If this little project proves to be fun and rewarding i would like to build a proper HT 5.1 set
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Old 6th January 2009, 11:16 PM   #5
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The soundcard needs an amplification source. The usual setup is
an 1/8 plug to the card and 2 phono plugs at the other end.

For overall improvement and minimal expense there is good advice on here for speaks that come from Europe such as the Monocor. If you have access to Fostex especially the FE127/126 those give good value and are certainly within your budget with enough left over to buy wood.

My experience with 3 inchers like the Tangband were not good. My TB W871s's are on the shelf.

If you can find some 2 ft particle board shelving, a table saw and a hole saw cutter for a drill press, you can make the MLTL design for the Fostex.

As a matter of fact there is a gigantic thread on here which goes through the whole reference design process for the FE127e.

Or on the small and compact, simple end, the Onken style of the Solo 103 from the Paper Hatte guy. The Fonken series on here is a variation of the concept for venting.
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Old 7th January 2009, 05:25 PM   #6
Henkjan is offline Henkjan  Netherlands
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Quote:
Originally posted by Hugo82
Can i hook any speakers i build directly to the soundcard with the apropriate connectors or do they need some external amplifying ?
just use the maranz and be gentle with the volume knob
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Old 7th January 2009, 11:18 PM   #7
Hugo82 is offline Hugo82  Netherlands
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Quote:
Originally posted by Henkjan
just use the maranz and be gentle with the volume knob
The Marantz has not been used for over a year and i just checked if it still worked... only the right channel seems to be operative.
Oh well.... picked it up on a flea market for about 70 bucks a few years ago so not a big loss.

Seems i need a new amp
1 of those T-amp's u linked to on the dutch forum seems perfect for the job for pc use

I think i'm going to order me a pair of those Fostex FE127E, they seem to pretty popular and seem to perform good.
Not decided on a design yet, there are 2 designs on the pdf specsheet for the FE127E ... might start with 1 of those.
The Pico Tango Henkjan linked to looks interesting also.

Another design i find highly interesting is a Fonken design, but looks a bit "complicated" ... don't have much woodworking skill yet

Does the FE127E need a filter/crossover to get rid of the very low's/very high's i read it can't quite reach or does it work perfectly without.
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Old 8th January 2009, 01:05 AM   #8
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I liked 3" Tang Band W3-871 a lot in 1.25 liter plastic bottle "enclosures"!

Tangband W3-871S in a bottle

btw How low bass do you want / need?
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Old 8th January 2009, 01:22 AM   #9
mikje is offline mikje  United States
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I don't know if this is where you found the fonken design, but you might look here for box plans for the FE127:

http://www.planet10-hifi.com/boxes.html

There are different versions of the fonken.

The gentleman who runs this site, Dave, is very knowledgeable and helpful. The word is, his boxes outperform the boxes on the 127 PDF.

There is a lot of info on the FE127 you can find via a Google search.

I just received my first pair in the mail Monday. I think I'm going to try the fonken design.

Here is another site to peruse:
http://www.zillaspeak.com/bib-howtobuild.asp

Best Wishes,
Mike
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Old 8th January 2009, 02:07 AM   #10
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Hugo,

I'm quite partial to the Solo103 design by Tony Gee, another "landgenoot". The purists won't appreciate the filter, I've tried it with and without, depending on the quality of the parts I prefer with... though I do consider myself purist... go figure... The filter parts and units together should fit snugly within your budget.

The FE103E is $38 or so and readily available.

http://www.humblehomemadehifi.com/Solo103.html
http://www.johneekels.nl/websitepagina/solo103.html

Besides this simple design and as some here have mentioned, there are the Fonkens, a superb design.

Hope this helps,

Ron
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