First project complete

prezden · 13th January 2009, 07:52 AM

Hi All
Well I've completed the first part of my new Mac based stereo. Thanks to Dave at Planet10 for providing the drivers and the wonderful box design. Thanks also for everyone else who responded to my dumb questions. Next will be a pair of new front channel using some 3" Aurora's and ApexJr tweeters.

Cheers- Preston

Moondog55 · 13th January 2009, 09:33 AM

Details??
Details?
I never saw the initial query so what driver what type of box / tuning / dimensions etc;etc;etc
Nice work BTW. I love the colour. Which way does the vent fire into the room or towards the wall?

Regards
Ted

prezden · 13th January 2009, 10:12 AM

Hey Ted- here's the details
The box is based on a planet10 design. The drivers are a pair of Eastech 7" in push push configuration with a front firing 3" flared tube port. It's built of 3/4" mdf. finished with 9 coats of paint and satin varnish. There are a pair of low pass filters using .15mh inductor and 4.7 cap. I'm not sure of the exact tuning. The dimensions are 24x 6.5x 14"

Cheers- Preston

sreten · 13th January 2009, 10:51 AM

Hi,

Two low pass subwoofer filters with 0.15mH and 4.7(uF?) ???
That does not sound right at all. (~ 2KHz L/R assuming 8R).

/sreten.

prezden · 13th January 2009, 11:40 AM

Hi sreten
The filters are made of components I had at hand. I started a thread about filters:
Loudspeakers >need help with low pass filter
The filters are very much still under development. I don't really know anything about these things. What you you suggest for components? I found an online calculator the specified 10.6mh and 663uf.

Cheers- Preston

badman · 14th January 2009, 06:00 PM

Are you running these with separate amplifiers than the main speakers?

If so, then check out the Harrison Labs line level products as you can get them to achieve the filter functions without giant caps and coils http://www.hlabs.com/

You pick a crossover frequency then get the fmods or other product to match it. It's not perfect, but a lot better than the filter you have now which is totally useless. The calculated values you posted would be much better but proper crossover design requires measurements, or at the very least, a more complex simulation and understanding of crossover issues.

prezden · 14th January 2009, 07:31 PM

Thanks badman- These look like they might do the trick.

PeteMcK · 15th January 2009, 02:05 AM

line level is real cheap to DIY:
http://www.t-linespeakers.org/tech/f...ssiveHLxo.html

SHadOW_666 · 15th January 2009, 10:16 PM

Really nice colors on that speakers.

prezden · 15th January 2009, 11:14 PM

thanks shadow

13th January 2009, 09:33 AM	#2
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Details?? Details? I never saw the initial query so what driver what type of box / tuning / dimensions etc;etc;etc Nice work BTW. I love the colour. Which way does the vent fire into the room or towards the wall? Regards Ted __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

14th January 2009, 06:00 PM	#6
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Are you running these with separate amplifiers than the main speakers? If so, then check out the Harrison Labs line level products as you can get them to achieve the filter functions without giant caps and coils http://www.hlabs.com/ You pick a crossover frequency then get the fmods or other product to match it. It's not perfect, but a lot better than the filter you have now which is totally useless. The calculated values you posted would be much better but proper crossover design requires measurements, or at the very least, a more complex simulation and understanding of crossover issues. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

15th January 2009, 02:05 AM	#8
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	line level is real cheap to DIY: http://www.t-linespeakers.org/tech/f...ssiveHLxo.html __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

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13th January 2009, 10:12 AM	#3
prezden diyAudio Member Join Date: Nov 2008	Hey Ted- here's the details The box is based on a planet10 design. The drivers are a pair of Eastech 7" in push push configuration with a front firing 3" flared tube port. It's built of 3/4" mdf. finished with 9 coats of paint and satin varnish. There are a pair of low pass filters using .15mh inductor and 4.7 cap. I'm not sure of the exact tuning. The dimensions are 24x 6.5x 14" Cheers- Preston

13th January 2009, 10:51 AM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Two low pass subwoofer filters with 0.15mH and 4.7(uF?) ??? That does not sound right at all. (~ 2KHz L/R assuming 8R). /sreten.

13th January 2009, 11:40 AM	#5
prezden diyAudio Member Join Date: Nov 2008	Hi sreten The filters are made of components I had at hand. I started a thread about filters: Loudspeakers >need help with low pass filter The filters are very much still under development. I don't really know anything about these things. What you you suggest for components? I found an online calculator the specified 10.6mh and 663uf. Cheers- Preston

14th January 2009, 07:31 PM	#7
prezden diyAudio Member Join Date: Nov 2008	Thanks badman- These look like they might do the trick.

15th January 2009, 10:16 PM	#9
SHadOW_666 diyAudio Member Join Date: Sep 2006	Really nice colors on that speakers.

15th January 2009, 11:14 PM	#10
prezden diyAudio Member Join Date: Nov 2008	thanks shadow

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