If you go the PC route, do you need to have it connected to the PC & PC running whilst playing music?
I love soldering.
I wouldn't mind to build some amps as long as there a fairly easy build, you know, join the dot's.
Doesn't all of this complex circuitry degrade the sound?
Once the digital signals are broken up into the seperate frequencies, you would then need to do DA conversion, which means 6 DA converters
etc
wait a minute.. you never mentioned budget before..
The AE drivers shouldn't be more expensive than the BMS drivers you were looking at. (..which btw, others have reported as being considerably less efficient than stated on their website.)
If you want something simple.. well, you are looking at the wrong design. A good dipole design isn't going to be truly simple, and a passive implementation will significantly increase complexity.
Suggestion: Do what I did for one of my designs.. just get some midbass drivers that are suitable with a bit of resistance from a large cored inductor (in series with the two paralleled drivers), and don't worry about lower freq.s.. Here are some:
Dayton PA255-8 10" Pro Woofer | Parts-Express.com
Ah yes, theres always a budget, the BMS drivers turned out to be more than I have been lead to believe by false advertising. Unless a bundle of money falls in my lap, 4 drivers that expensive wont be on the list.
I think I am hooked & convinced that I will probably need to be active, I dont want to make things difficult for myself
Think, that way I can build the speakers & the amps, fun ,fun, fun
There are a lot of amp-modules discussed here that is with a bit soldering easy to do. Or like I do with class-d modules they are more expensive then a module.Ah yes, theres always a budget, the BMS drivers turned out to be more than I have been lead to believe by false advertising. Unless a bundle of money falls in my lap, 4 drivers that expensive wont be on the list.
I think I am hooked & convinced that I will probably need to be active, I dont want to make things difficult for myself
Think, that way I can build the speakers & the amps, fun ,fun, fun
Or search the second hand market for some qaulity low price amplifiers pioneer or so, with source direct switch.
Or just buy new yamaha ax 397 95W 4ohm (australian market is exspensive i see in netherlands the ax397 cost only 232 australian dollar).
yammi Yamaha Music Australia - Audio Visual - Hi-Fi Components - AX-397 and AX-497
Prices uk http://www.pricerunner.co.uk/sp/yamaha-ax-397.html
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It look promising this driver high Q for pa with fs 55Hz I would like to simulate these two in series, only poor data.
12-Inch Paper Cone PA Driver - Jaycar Electronics
Back to back and make a dipole.
http://www.jaycar.com.au/productView.asp?ID=CT2023&CATID=15&form=CAT&SUBCATID=645
http://www.jaycar.com.au/productView.asp?ID=KC5150&CATID=25&form=CAT&SUBCATID=557
12-Inch Paper Cone PA Driver - Jaycar Electronics
An externally hosted image should be here but it was not working when we last tested it.
Back to back and make a dipole.
An externally hosted image should be here but it was not working when we last tested it.
http://www.jaycar.com.au/productView.asp?ID=CT2023&CATID=15&form=CAT&SUBCATID=645
An externally hosted image should be here but it was not working when we last tested it.
http://www.jaycar.com.au/productView.asp?ID=KC5150&CATID=25&form=CAT&SUBCATID=557
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Today's DSP modules are normally of useful quality. But even if it feels bad today you will very soon forget about it when you are listening to a pair constant/controlled directivity speakers, one of which a decently executed OB speaker is.
Yes you are right the Australian market is expensive, small population & a long way to bring goods I guess.
I have a 7:1 AV reciever that has enough channels, I wonder if that could be used somehow? The movie makers manange to get different sound coming out of different speakers.
You can't use the sound control features of the AV receiver. But if it features a DVD multichannel input, you can use the 6 built-in amplifiers at your will and get a 6 channel volume control for free - just where it works best.
Rudolf
Efficency and xmax tend to be inversely correlated so you'll have a hard time with that. Beyma 12G40 could be worth a look but, like the 12PW5, its Fs is on the high side and modifying the spider is probably more than you want to get into here.
Is this the sort of input you where thinking of? If it is what would I use, to get the signal split up into its component frequencies.
This is getting exciting
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Yes, exactly. It looks suspiciously like my own Onkyo receiver
. Behind the input you get a 6 channel volume control and the option to give each channel an individual attenuation. And 6 amplifiers of course.The means for splitting up the frequencies are multiple: A PC with a 7.1 soundcard, a DBX driverack, Alto maxidrive, Behringer DCX2496 or some miniDSP boards.
Yes, exactly. It looks suspiciously like my own Onkyo receiver
The means for splitting up the frequencies are multiple: A PC with a 7.1 soundcard, a DBX driverack, Alto maxidrive, Behringer DCX2496 or some miniDSP boards.
It probably looks like your Onkyo becauses it's an Integra which is made by Onkyo
. I will spend some time researching the option before I dive in, the exciting thing is I already have my OB connected to the reciever, all I need is one of the controller/equalisers a couple of extra cables, change a few connections & off I go, oh and a lot more knowledge.
thanks for the help
Thanks everybody & a special mention to Helmuth who has been a tireless supplier of help, thanks.
AE Speakers
John_E_Janowitz
Who I assume is from AE Speakers has suggested I go for the Diploe15's Acoustic Elegance • View topic - Dipole10, Dipole12, Dipole15 parameters
they are not as efficent as I was looking for, but if I'm going active & it looks like I am, a single pair of these may be the way to go. Only need to buy two, only need to ship two.
What do you think?
John_E_Janowitz
Who I assume is from AE Speakers has suggested I go for the Diploe15's Acoustic Elegance • View topic - Dipole10, Dipole12, Dipole15 parameters
they are not as efficent as I was looking for, but if I'm going active & it looks like I am, a single pair of these may be the way to go. Only need to buy two, only need to ship two.
What do you think?
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1X 12" is 16ohm parralel a other makes 8ohm. Simulation (0,5W) show very poor efficiency, this means problems with matching with mid and high efficiency in a passive configuration. When you parallel two ad 6dB to efficiency.
With 1W it is 70dB at 40Hz with two driver at a side it is very nice.
I want to make a passive OB in the near future so at has my attention to. Nice to see that the amplifier is already there only connect the DSP to the dvd 7.1 input. You have to make a passive preamp to connect the souces so you can switch and use the onkyo only as endstage.
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How to use horn response for OB. It is a great tool fast and easy thanks to David J mcBean.
At combined response with R I mean half diameter of the used driver. Or more if the distance from front to back is bigger.
The series resistance can also be the Re of the driver witch is in series with your simulated driver.
At combined response with R I mean half diameter of the used driver. Or more if the distance from front to back is bigger.
The series resistance can also be the Re of the driver witch is in series with your simulated driver.
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Maybe you misread my post, John was recommending 1x Dipole15, I think, not 12"?
Why are you thinking about going passive, after all I have read & been told about active being, easier & superior?
I also have a Audio Note preamp (dont really know what a passive preamp is?) that I bought cheap from Lithuania. Would it do?
I notice the Behringer has balanced plugs, I assume I will need to get a plug with balanced on one end & RCA or Coaxil on the other. I want to play the music from my Logitech Squeezebox.
I'm using a single Dipole 15 per side in these and am having no output shortage yet. Eq'ing them flat to 30Hz and then a rolloff below to prevent excessive excursion.
Greg
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OkMaybe you misread my post, John was recommending 1x Dipole15, I think, not 12"?
Why are you thinking about going passive, after all I have read & been told about active being, easier & superior?.
A passive preamp isn't a amp only potentiometer and switch. Sometimes there is a audio transformer involved
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