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Old 4th May 2008, 10:04 PM   #1
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Default high efficiency speaker with a budget of us$1000,00

hi all

i want to build a high-efficiency speaker with at least 95db. I have a budget of us$ 1.000,00 for a pair.

any ideas ?

Angelo
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Old 4th May 2008, 10:10 PM   #2
gedlee is offline gedlee  United States
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Default Re: high efficiency speaker with a budget of us$1000,00

Quote:
Originally posted by angeloitacare
hi all

i want to build a high-efficiency speaker with at least 95db. I have a budget of us$ 1.000,00 for a pair.

any ideas ?

Angelo

At $1200 I'd suggest

DIY Waveguide loudspeaker kit

But at $1000 it will be tough.
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Old 4th May 2008, 10:59 PM   #3
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Default more specific

hi Earl

i might have to be more specific.
In this price needs to be included shipping of the speakers and parts to brazil. Cabinets and horns i will build by myself.

Angelo
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Old 4th May 2008, 11:19 PM   #4
gedlee is offline gedlee  United States
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Default Re: more specific

Quote:
Originally posted by angeloitacare
hi Earl

i might have to be more specific.
In this price needs to be included shipping of the speakers and parts to brazil. Cabinets and horns i will build by myself.

Angelo

Good luck.
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Old 5th May 2008, 06:12 AM   #5
OzMikeH is offline OzMikeH  Australia
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Fostex FE207E.
Fostex FT17-H
PIO 0.47uF capacitor
8 ohm resistor of your choice. (to pad down the 98.5dB tweeter)
Phase plugs.
Some paint for some funny little dots if you wish.

Should be about US $500 for the pair not including freight. Leaves you plenty for the cabinets.

Efficiency 95dB/W.
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Old 5th May 2008, 07:17 AM   #6
FrankWW is offline FrankWW  Canada
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Hi Angelo,

You can't get a satisfactory woofer from Selenium? (Or do they charge an arm and leg?) If you can, then you've cut down your freight cost considerably.

But if you can't, B&C makes some very nice light weight Neo woofers which would cut down on your freight cost

You can see some examples at Parts Express in the pro sound drivers section

http://www.partsexpress.com/speakers.cfm

How bad are your customs fees?
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Old 5th May 2008, 11:30 AM   #7
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Default selenium

hi Mike

Fostex FE207E.
Fostex FT17-H
PIO 0.47uF capacitor

interesting. I'll check it out.


hi Frank

Selenium is expensive in brazil, because of high taxes. Custom duty is 75%, but sometimes, the parcels go through, without beeing charged.
Is there a particulare 8" or 10" woofer or subwoofer, that could be recommended ? I was thinking about a 8" coax, and a subwoofer.
Like a Radian508, plus a Tang Band sub.

Angelo
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Old 5th May 2008, 12:14 PM   #8
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Hi,
Angelo you can look at a Morel MDM55 with a horn loaded at 300Hz. That would give an interesting 3-way >90dB. I like the idea of chosing first your main driver: cone, dome/CD; ribbons for HFs, etc.
On the other side, since you have a project at hands, you can look at a two way design upgradable to a 3-way, in a later date, with two main drivers from Selenium 15WS600/D220Ti.
Also another driver (for measuring) is the COAX from Bravox-Pro BC 15P/169.
Keep us posted.
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Old 5th May 2008, 02:31 PM   #9
OzMikeH is offline OzMikeH  Australia
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Angelo, Many use 1uF with no resistor. I find it hurts my ears. 8 ohms with 0.47 is much smoother to me, but I might be missing something around 15kHz.
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Old 5th May 2008, 02:45 PM   #10
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Hello Angelo,

There has been a lot of talk on the various forums about high efficiency designs lately. Several of these are using our woofers. There are multiple ways to go about the high efficiency design depending on what you want to do for the high frequency and what kind of power response you want in the room. Of course horns are the first option and will give the greatest efficiency and output capability with a compression driver. Several ribbons are also a viable option as well.

I figured I would give you a few links to start out with. They may not reach your goals or price range but you can see experience with some other drivers out there. The first is very recent and in response to a speaker Jim Salk displayed at the InDIYana DIY show and audiokarma show.
http://www.htguide.com/forum/showthr...d=1#post398202

This uses one of our Lambda woofers with the PHL mid and a morel tweeter, although the tweeter in this case will be the limiting factor. Here is a link to more on the Jim Salk design. http://www.audiocircle.com/circles/i...?topic=54161.0

Here is a high efficiency design we have been working on recently:
http://www.aespeakers.com/phpbb2/vie...php?f=1&t=1620
and here is the thread that started it. lots of discussion about high efficiency designs:
http://www.avsforum.com/avs-vb/showthread.php?t=982428

Here is a thread discussing high efficiency midranges:
http://www.avsforum.com/avs-vb/showthread.php?t=1016646

Then, here is a link to William Cowan's DIY unity horn project. This may be of great interest to you as the drivers are not that expensive and you can get extreme efficiency. http://www.cowanaudio.com/unity.html

John
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