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
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
angeloitacare said:
At $1200 I'd suggest
http://www.diyaudio.com/forums/showthread.php?s=&threadid=122318
But at $1000 it will be tough.
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
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
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.
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.
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?
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?
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
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
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.
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.
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.
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/showthread.php4?p=398202&posted=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/index.php?topic=54161.0
Here is a high efficiency design we have been working on recently:
http://www.aespeakers.com/phpbb2/viewtopic.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
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/showthread.php4?p=398202&posted=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/index.php?topic=54161.0
Here is a high efficiency design we have been working on recently:
http://www.aespeakers.com/phpbb2/viewtopic.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
hi John
your 10" Neo woofer looks interesting . I would like to have more data of the driver, since i have not found anything on your homepage.
i have drawn a design idea, using a Radian 508 coax, and a
TANG BAND W8-740C to use below 100hz.
http://www.alteraudiousa.com/ProductInfo.aspx?productid=TANG BAND W8-740C
any comments ?
http://www.flickr.com/photos/12312992@N07/page1/
your 10" Neo woofer looks interesting . I would like to have more data of the driver, since i have not found anything on your homepage.
i have drawn a design idea, using a Radian 508 coax, and a
TANG BAND W8-740C to use below 100hz.
http://www.alteraudiousa.com/ProductInfo.aspx?productid=TANG BAND W8-740C
any comments ?
http://www.flickr.com/photos/12312992@N07/page1/
Attachments
Hawthorne audio silver iris coaxials (10" or 15") are about $150/each (not the sterling silver iris). 96dB/w/m for 15", 94dB/w/m for 10"
I built a pair of speakers with these for about $600, including drivers. Sounds nice, check out audiocircle for more info and reviews on them.
I built a pair of speakers with these for about $600, including drivers. Sounds nice, check out audiocircle for more info and reviews on them.
Try Madisound
http://www.madisound.com/catalog/index.php?manufacturers_id=131&sort=3a&filter_id=158
Fostex System
http://www.madisound.com/catalog/index.php?manufacturers_id=131&sort=3a&filter_id=158
Fostex System
I have the W8-740C and it needs lots of power!
I like the Fostex 207 plus tweeter suggestion. Use in a BIB enclosure for best results or stick them into a simple 35L ported box.
I also like the Radian suggestion and many of the others but am not familiar enough with the drivers to make a recommendation. Can't go wrong with Fostex IMO.
Godzilla
I like the Fostex 207 plus tweeter suggestion. Use in a BIB enclosure for best results or stick them into a simple 35L ported box.
I also like the Radian suggestion and many of the others but am not familiar enough with the drivers to make a recommendation. Can't go wrong with Fostex IMO.
Godzilla
A very different recommendation would be to tackle a clone of a Klipsch Jubilee.
These were conceived of as a two way system with the top crossed over at about 700-800Hz. The trick is in the bass bin. An article by Delgado & Klipsch (JAES, 2000) provide the key points on the plans. The bass bins are a bifurcated folded exponential horns with a pair of 12 in woofers (Pioneer makes drivers with the proper T/S that retail for about $50 apiece (US).
They honestly dig down to about 38Hz, do not require corner placement and have low distortion. The top section could be accomplished a number of ways (the Klipsch suggested version is out of your price range). Perhaps some used altec horns (511 or 811) and a Great Plains Audio version of a 902 driver. You would need Aluminum diagrams and EQ to get the bandwidth (high end). There are probably B&C drivers that could be used (I think there stuff is a real deal).
They are certainly highly efficient. There is much discussion and construction tips at the Klipsch forum.
Just a thought,
-Tom
These were conceived of as a two way system with the top crossed over at about 700-800Hz. The trick is in the bass bin. An article by Delgado & Klipsch (JAES, 2000) provide the key points on the plans. The bass bins are a bifurcated folded exponential horns with a pair of 12 in woofers (Pioneer makes drivers with the proper T/S that retail for about $50 apiece (US).
They honestly dig down to about 38Hz, do not require corner placement and have low distortion. The top section could be accomplished a number of ways (the Klipsch suggested version is out of your price range). Perhaps some used altec horns (511 or 811) and a Great Plains Audio version of a 902 driver. You would need Aluminum diagrams and EQ to get the bandwidth (high end). There are probably B&C drivers that could be used (I think there stuff is a real deal).
They are certainly highly efficient. There is much discussion and construction tips at the Klipsch forum.
Just a thought,
-Tom
The speakers should not be larger than 17".
The Lambda 10" woofers look very interesting. I have not found any data on the manufacturer homepage. Can you post the spec's here, John ?
thanks Angelo
The Lambda 10" woofers look very interesting. I have not found any data on the manufacturer homepage. Can you post the spec's here, John ?
thanks Angelo
angeloitacare said:
Hello Angelo,
We haven't had time to get much info up on the site. Keeping busy making drivers and not having enough time for website work. Here is an old archive page to the lambda site talking about the woofers:
http://web.archive.org/web/20040307225940/lambdacoustics.com/drivers/TD10M.html
Unfortunately the parameters are mainly missing. These are a close approximation.
Fs: 40hz
Qms: 2.8
Vas: 59L
Cms: .35
Mms: 45g
Rms: 4kg/s
Xmax: 6mm (70% based on BL curve)
Xmech: 10mm
Sd: 345sqcm
Qes: .26
Re: 6.6
Le: .2ohm
Z: 8ohm
Bl: 17Tm
Qts: .24
1wSPL: 93.7dB
John
What do you mean? Selenium is not made in Brazil?
Selenium is made in Rio Grande do Sul, South of brazil. Unfortunately the price of national speakers here in brazil is not as low, as it could be, because of high taxes charged for each product . That does not make Selenium too much attractive.
The 10" Lambda looks indeed interesting. Will think about that one.
Angelo
Selenium is made in Rio Grande do Sul, South of brazil. Unfortunately the price of national speakers here in brazil is not as low, as it could be, because of high taxes charged for each product . That does not make Selenium too much attractive.
The 10" Lambda looks indeed interesting. Will think about that one.
Angelo
http://www.troelsgravesen.dk/JA8008.htm
These should be just within your budget (the Cross-cap version). I am surprised that no one has suggested them. There are few compromises and Troel's designs are well thought of.
96dB?
These should be just within your budget (the Cross-cap version). I am surprised that no one has suggested them. There are few compromises and Troel's designs are well thought of.
96dB?
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