I am planning to make a dipole speaker similar to the one on the linkwitz website, but I would like to make mine for a lot less money. My current idea is to have a 4 or 5 foot by 2 foot baffle with 5 speakers.
1 stryke audio SA071 driver with a tweeter (to be determined), passivly crossed over between the two, driven with one amp. The stryke drivers can be purchased for $10 in quanities of 10 or more. http://www.aespeakers.com/store.php
1 stryke audio driver with a active low pass cross over at around 200 to 250 Hz with its own amp. This is to compensate for the 6dB roll off of the open baffle down to 125Hz or so.
2 Baja Profile Subs with one amp, low pass crossed over at 125Hz or so with its own amp. Again to compensate the 6db roll off of the baffle down to 60Hz or so. My brother got these drivers for free with some other speakers and gave them to me. Apparently, he is not the only one who didn't want them, because there are tons on ebay for dirt cheap. http://www.profileusa.com/manuals/BX12.pdf
I was planning to use the national LM4780 for each of my amplifiers which I can build. However, I would like to buy my active crossovers and power supplies.
The only active crossovers that I have found for home audio are on http://www.bmm-electronics.com/ but they are not adjustable and I think they are across the atlantic, so shipping probably won't be worth it. There are also tons of car audio active crossovers, but the adjustable ones tend to have way more features than I need, so I would think there is something cheaper. I just need some active adjustable low pass crossovers. Anybody know where I can find cheap premade adjustable active crossovers? Anybody got experience with car audio crossovers in a home setup? Maybe they are the cheapest thing I can get without degrading sound quality.
As for power supplies. I would like to get a switch mode power supply with +-30V (or +-40V or something) output and plenty of current output for at least 3 of those chip amps. I don't really care about the ripple on the power supply for 2 reasons. 1. The lm4780 has good power supply rejection, and 2. If the supply is switch mode, it should have a switching frequecy higher than 35kHz, so I won't hear it anyway. (If I get a dog, it could be ****ed). I haven't been able to find any cheap power supplies that can do all this. (under $100). I would think I can get this because a 500W +-30V power supply shouldn't be too technically different than a 500W ATX power supply which are not that hard to find for $100 even with power factor correction. Does anybody know where I can get one cheap?
Thanks for any info.
1 stryke audio SA071 driver with a tweeter (to be determined), passivly crossed over between the two, driven with one amp. The stryke drivers can be purchased for $10 in quanities of 10 or more. http://www.aespeakers.com/store.php
1 stryke audio driver with a active low pass cross over at around 200 to 250 Hz with its own amp. This is to compensate for the 6dB roll off of the open baffle down to 125Hz or so.
2 Baja Profile Subs with one amp, low pass crossed over at 125Hz or so with its own amp. Again to compensate the 6db roll off of the baffle down to 60Hz or so. My brother got these drivers for free with some other speakers and gave them to me. Apparently, he is not the only one who didn't want them, because there are tons on ebay for dirt cheap. http://www.profileusa.com/manuals/BX12.pdf
I was planning to use the national LM4780 for each of my amplifiers which I can build. However, I would like to buy my active crossovers and power supplies.
The only active crossovers that I have found for home audio are on http://www.bmm-electronics.com/ but they are not adjustable and I think they are across the atlantic, so shipping probably won't be worth it. There are also tons of car audio active crossovers, but the adjustable ones tend to have way more features than I need, so I would think there is something cheaper. I just need some active adjustable low pass crossovers. Anybody know where I can find cheap premade adjustable active crossovers? Anybody got experience with car audio crossovers in a home setup? Maybe they are the cheapest thing I can get without degrading sound quality.
As for power supplies. I would like to get a switch mode power supply with +-30V (or +-40V or something) output and plenty of current output for at least 3 of those chip amps. I don't really care about the ripple on the power supply for 2 reasons. 1. The lm4780 has good power supply rejection, and 2. If the supply is switch mode, it should have a switching frequecy higher than 35kHz, so I won't hear it anyway. (If I get a dog, it could be ****ed). I haven't been able to find any cheap power supplies that can do all this. (under $100). I would think I can get this because a 500W +-30V power supply shouldn't be too technically different than a 500W ATX power supply which are not that hard to find for $100 even with power factor correction. Does anybody know where I can get one cheap?
Thanks for any info.
Look at www.marchandelec.com
sound.au.com (ESP Project 09)
and at www.behringer.com
I don't have any direct experience with either but living for a couple of years with a Behringer EQ unit I have a pretty good opinion especiailly if I wanted something right out of the box - no DIY.
On the other hand Marchand units are available complete, as DIY kits or even just PCBs and potentially could cost less.
ESP is even more DIY and my experience with them is also very good.
sound.au.com (ESP Project 09)
and at www.behringer.com
I don't have any direct experience with either but living for a couple of years with a Behringer EQ unit I have a pretty good opinion especiailly if I wanted something right out of the box - no DIY.
On the other hand Marchand units are available complete, as DIY kits or even just PCBs and potentially could cost less.
ESP is even more DIY and my experience with them is also very good.
Thanks for the info.
The marchandelec boards may work, but the premade ones are pretty expensive compaired to a car version of the same thing. It seems like 8 times as much. The behringer stuff is also more expensive than a car version of the same thing. It seems like the home versions are just always marked up more. Some of the ESP boards could also work for a cross over.
Any power supply places you know of?
Thanks
The marchandelec boards may work, but the premade ones are pretty expensive compaired to a car version of the same thing. It seems like 8 times as much. The behringer stuff is also more expensive than a car version of the same thing. It seems like the home versions are just always marked up more. Some of the ESP boards could also work for a cross over.
Any power supply places you know of?
Thanks
spkerguy
Swtching PSUs of the kind you want are not easy to get, and not cheap when you do find them. They have a tiny market in comparison with computer components, and are usually built as custom items for specific products, and therefore have no economies of scale. You are much better off going with a standard type tranformer/capacitor psu.
As for the Behringer, I doubt you understand what it actually does. i very much doubt that there is a in-car unit that does as much as a third of what the Behringer is capable of.
Swtching PSUs of the kind you want are not easy to get, and not cheap when you do find them. They have a tiny market in comparison with computer components, and are usually built as custom items for specific products, and therefore have no economies of scale. You are much better off going with a standard type tranformer/capacitor psu.
As for the Behringer, I doubt you understand what it actually does. i very much doubt that there is a in-car unit that does as much as a third of what the Behringer is capable of.
pinkmouse,
As far as the psu, you're probably right. I don't know of any psu's out there with the economy of scale that the atx power supply has, but that is what I was looking for. I hope somebody knows of something I don't. I design power factor correction ic's, but I don't design the applications, and I don't do the marketing. (Please buy some http://www.onsemi.com/site/products/summary/0,4450,NCP1601,00.html). I am still hoping someone knows of a product out there with the economy of scale of the atx supplies (or close) with +-30V rails or something similar. I know we sell the lots and lots of the power IC's, but the applications normally are not for my home speakers. I do know switch mode power supplies require smaller transformers and smaller caps than similar standard psu's and that can potentially give considerable cost savings.
As for not knowing what the behringer eqs do, as I said, I just need a low pass filter, active, and adjustable, not the extras. As an electrical engineer with a behringer eurorack mx602a sitting beside my computer I am a little offended that you don't think I know what behringer anything can do. 2/3 extra does nothing for me.
I am just looking for some adjustable low pass filters, for the cheapest price I can find them.
Also, I am looking for some power supplies that get the job done for as cheap as possible.
Does anybody know of some cheap active low pass filters and some cheap power supplies?
P.S. Thanks again sam9 for your post. I had never seen those websites, and I may use one or two of their boards as those are the only linkwitz/reilly crossovers I have seen for purchase in the US.
PPS. Sorry for my poorer than poor spelling.
As far as the psu, you're probably right. I don't know of any psu's out there with the economy of scale that the atx power supply has, but that is what I was looking for. I hope somebody knows of something I don't. I design power factor correction ic's, but I don't design the applications, and I don't do the marketing. (Please buy some http://www.onsemi.com/site/products/summary/0,4450,NCP1601,00.html). I am still hoping someone knows of a product out there with the economy of scale of the atx supplies (or close) with +-30V rails or something similar. I know we sell the lots and lots of the power IC's, but the applications normally are not for my home speakers. I do know switch mode power supplies require smaller transformers and smaller caps than similar standard psu's and that can potentially give considerable cost savings.
As for not knowing what the behringer eqs do, as I said, I just need a low pass filter, active, and adjustable, not the extras. As an electrical engineer with a behringer eurorack mx602a sitting beside my computer I am a little offended that you don't think I know what behringer anything can do. 2/3 extra does nothing for me.
I am just looking for some adjustable low pass filters, for the cheapest price I can find them.
Also, I am looking for some power supplies that get the job done for as cheap as possible.
Does anybody know of some cheap active low pass filters and some cheap power supplies?
P.S. Thanks again sam9 for your post. I had never seen those websites, and I may use one or two of their boards as those are the only linkwitz/reilly crossovers I have seen for purchase in the US.
PPS. Sorry for my poorer than poor spelling.
spkerguy said:
spkerguy said:
Sorry if I offended you, but if you read the quote above it does suggest that you don't know that much about the functions of the Behringer if you compare it's functioning to an in-car unit.
From re-reading your post, it sounds like a sub plate amp might be the best thing for you. They have usually have adjustable frequency, and some even have a tunable eq. Then you can concentrate on putting your best into the other amps that need it the most, as the sub just needs lots of power, not finesse.
Good luck
Re: Re: Where can I buy active crossovers and cheap power supplies?
I looked on ebay, and there was 1 Behringer 2310 about $85. There are lots of car crossovers on ebay for less than $30. Some even have adjustable slopes in addition to variable frequencies. For some reason in a car they call them electronic crossovers instead of active crossovers.
It is pretty bad, but if you click somewhere in the store frame (white background), and hold down your mouse button while moving the mouse up and down you can get to what you need.
keyser said:my eye fell on a Behringer 2310.
(its cheap too! especially on e-bay)
I looked on ebay, and there was 1 Behringer 2310 about $85. There are lots of car crossovers on ebay for less than $30. Some even have adjustable slopes in addition to variable frequencies. For some reason in a car they call them electronic crossovers instead of active crossovers.
Bill Fitzpatrick said:
It is pretty bad, but if you click somewhere in the store frame (white background), and hold down your mouse button while moving the mouse up and down you can get to what you need.
I decided to get 2 legacy lxr4 electronic crossovers from ebay. They were only $20 a piece, and the seller has 48 more if anybody else wants to go this way.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5745253984
The specs on its data sheet looked good, but who knows how accuratly they speced it.
Also, I thought I would mention that AudioControl makes some car crossovers that use the linkwitz-riley method. I got the legacy, because it is continuously adjustable frequecy, and the AudioControl crossovers can only be adjusted by changing resistors. They may be cheaper than buying a linkwitz-riley crossover designed for home audio if you are going for bi or tri-amping, but you have to wait to see them on ebay.
John
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5745253984
The specs on its data sheet looked good, but who knows how accuratly they speced it.
Also, I thought I would mention that AudioControl makes some car crossovers that use the linkwitz-riley method. I got the legacy, because it is continuously adjustable frequecy, and the AudioControl crossovers can only be adjusted by changing resistors. They may be cheaper than buying a linkwitz-riley crossover designed for home audio if you are going for bi or tri-amping, but you have to wait to see them on ebay.
John
Re: Re: Re: Where can I buy active crossovers and cheap power supplies?
Thanks for the tip. I downloaded Firefox and guess what? The site still doesn't display correctly although some of the things that didn't work before now do. That's 4 of the top browsers. What a joke. I emailed them but I'm sure there are deaf ears at the other end.
demogorgon said:
Thanks for the tip. I downloaded Firefox and guess what? The site still doesn't display correctly although some of the things that didn't work before now do. That's 4 of the top browsers. What a joke. I emailed them but I'm sure there are deaf ears at the other end.
Re: Re: Where can I buy active crossovers and cheap power supplies?
I complained to John about that -- his web guy got the job patrly done & them abandoned him. He is looking for someone (the stuff he wants done is too fancy for me). I have his email address if you want to contact him.
Car XOs tend to be made very much with minimum cost in mind....
If you want real simple XOs you should consider PLLXOs. On the other hand a simple active XO is easier to build than a 4870 amp.
As to switching supplies for analog gear, i wouldn't even consider it... unless incrediably well done (ie VERY expensive), they inject huge amonts of garbage into the system.
dave
Bill Fitzpatrick said:
I complained to John about that -- his web guy got the job patrly done & them abandoned him. He is looking for someone (the stuff he wants done is too fancy for me). I have his email address if you want to contact him.
Car XOs tend to be made very much with minimum cost in mind....
If you want real simple XOs you should consider PLLXOs. On the other hand a simple active XO is easier to build than a 4870 amp.
As to switching supplies for analog gear, i wouldn't even consider it... unless incrediably well done (ie VERY expensive), they inject huge amonts of garbage into the system.
dave
Re: Re: Re: Where can I buy active crossovers and cheap power supplies?
here's what you need:
if you don't mind extremely good build quality with a definite industrial appearance consider the Krohn-Hite Active Filters which are showing up with increasing frequency on EBay -- I bought a bunch from a big yellow research lab in Rochester NY. they're fun just to look at.
I don't believe that it is out of the realm for a DIYr to build a very quiet switching supply -- while an SG3525 SMPS built on a piece of vectorboard will radiate like the dickens, an LT3439 supply could be used in ultrasound equipment -- and it's not terribly expensive.
planet10 said:
here's what you need:
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An externally hosted image should be here but it was not working when we last tested it.
if you don't mind extremely good build quality with a definite industrial appearance consider the Krohn-Hite Active Filters which are showing up with increasing frequency on EBay -- I bought a bunch from a big yellow research lab in Rochester NY. they're fun just to look at.
I don't believe that it is out of the realm for a DIYr to build a very quiet switching supply -- while an SG3525 SMPS built on a piece of vectorboard will radiate like the dickens, an LT3439 supply could be used in ultrasound equipment -- and it's not terribly expensive.
I went with this power supply:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3867741142
I know it is switching, but I'll let you know if that gives problems.
It seems there were a few of them on ebay, and I guess there will be more in the future.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3867741142
I know it is switching, but I'll let you know if that gives problems.
It seems there were a few of them on ebay, and I guess there will be more in the future.
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