SC, I am not certain that I really understand you, but I will attempt to answer your questions.
It sounds to me like you need a bandpass for your midwoofer, high pass for the treble, and lowpass for the ".1". I don't know if this is a stereo ".1" (stereo subs) or mono, but with four boards, you could handle either. You would need four channels of amplification for the mains, plus the ".1" channel.
"Order" refers to the electrical slope of the crossover. It is not easy to design crossovers, if you do not understand the basics, then this project may be too advanced for you. I don't say this to scare you off, only to warn you that you may need to do some research to learn how to properly implement a good sounding speaker design.
It sounds to me like you need a bandpass for your midwoofer, high pass for the treble, and lowpass for the ".1". I don't know if this is a stereo ".1" (stereo subs) or mono, but with four boards, you could handle either. You would need four channels of amplification for the mains, plus the ".1" channel.
"Order" refers to the electrical slope of the crossover. It is not easy to design crossovers, if you do not understand the basics, then this project may be too advanced for you. I don't say this to scare you off, only to warn you that you may need to do some research to learn how to properly implement a good sounding speaker design.
Hi,
For whoever will ship the stuff to germany:
When will you start shipping?
Can you fill the value field on the shipping form with a value of max $20?
thanks 😀
For whoever will ship the stuff to germany:
When will you start shipping?
Can you fill the value field on the shipping form with a value of max $20?
thanks 😀
Ok, Basically crossover is only handling frequency seperation which is the same as the one inside the speaker. Then how reciever/preamplifier/DAC got mutiple channels? Do they have an existed crossover inside / some other stuffs to do all these?
So is it one PCB handle mono only, I understand 2 PCBs for stereo to my two front speakers, but what about the extra 2 PCBs for? Sub? Center? And is this crossover an external crossover which will place outside of the speakers? Then What do I do with the exsisting crossover which installed inside of the speaker carbinet?
So is it one PCB handle mono only, I understand 2 PCBs for stereo to my two front speakers, but what about the extra 2 PCBs for? Sub? Center? And is this crossover an external crossover which will place outside of the speakers? Then What do I do with the exsisting crossover which installed inside of the speaker carbinet?
roibm,
There was some discussion about about pooling German orders, but it never got off the ground. I am placing the board order Monday morning (the 10th), 4 week turn, and will ship your order out myself, hopefully the day after I receive the boards. I have already begun addressing packages.
There was some discussion about about pooling German orders, but it never got off the ground. I am placing the board order Monday morning (the 10th), 4 week turn, and will ship your order out myself, hopefully the day after I receive the boards. I have already begun addressing packages.
Yes.S.C said:
This is generally done digitally, and is not really related to this project.
Yes. If you just need high pass and low pass, then two boards are enough. But if you want to bandpass your 2-way's woofer and especially if you need a low pass for the sub that you control, as opposed to the ".1" output, then you need four boards.
You would have to remove it! Alhough worthwhile, this is not a trivial project.
Hehe😀 Nice, then I can have a better crossover for my Awia Bookshief speakers in order to make the replacement woofer more compatible, and eliminate the unwanted treble sound on my woofer. And add a sub..... Nice What do you think about the opamp board buffer? is it 2 for 1 crossover board or 4 and I need 8 or 16 boards total, right? I have some OPA2132 around, can I use those?
The simplest way to think about it is 1 set of opamps per mox board. So if you order four boards, order four sets of opamps.
OPA2132 should work great. You don't need any opamp boards at all if you are using IC opamps.
OPA2132 should work great. You don't need any opamp boards at all if you are using IC opamps.
Well, the deadline has past. The response has been great! If you missed the deadline but still want to order, I'll continue to accept orders that come in until I place the order Monday morning.
Once I place the order and "sell out" of any excess, I'll update the order form, so if the form is up, you can order.
http://www.anidian.com/audio/construct/mox_order.shtml
Once I place the order and "sell out" of any excess, I'll update the order form, so if the form is up, you can order.
http://www.anidian.com/audio/construct/mox_order.shtml
Attention Steve M (skjg): could you please submit a payment for shipping? My email to you was returned as "user unknown." I need a valid email address so that I can keep you updated on the order status.
Thanks.
Thanks.
Just made payment, I hope the order still fits in.
Found out a little late about this group buy.
I don't know the function of the 2SK389 yet, but ordered two sets. Is that sufficient for stereopair 2 way 2nd order?
Found out a little late about this group buy.
I don't know the function of the 2SK389 yet, but ordered two sets. Is that sufficient for stereopair 2 way 2nd order?
indoubt,
The 2SK389 are the input diff. pair for the discrete opamps. I'm providing them for your convenience, but you can source them elsewhere if you aren't certain of your need.
I would say that you need 3 sets (not 2) for your setup, 4 if you wanted both the regular and volume control buffers.
The 2SK389 are the input diff. pair for the discrete opamps. I'm providing them for your convenience, but you can source them elsewhere if you aren't certain of your need.
I would say that you need 3 sets (not 2) for your setup, 4 if you wanted both the regular and volume control buffers.
The production order is in! Everyone has paid in full and there are no outstanding issues with shipping, payments, etc. (indoubt-will send you mail re your request)
I am sending a generic confirm email to the bulk of the persons in the buy. If you made multiple orders, you should receive an individual email to confirm that I properly combined your orders--please let me know if you do not.
The final total was 431 mox boards! Because the response has been so great, I have ordered additional boards and 2SK389 above the number requested. I will continue to supply these until I run out. There will also be a sizable donation made to support this forum. Thank you to everyone who ordered, and especially to moamps and Jens.
I will keep everyone updated as to the order status. The boards are due to ship to me June 10th, but my experience is that they are often faster than this.
I am sending a generic confirm email to the bulk of the persons in the buy. If you made multiple orders, you should receive an individual email to confirm that I properly combined your orders--please let me know if you do not.
The final total was 431 mox boards! Because the response has been so great, I have ordered additional boards and 2SK389 above the number requested. I will continue to supply these until I run out. There will also be a sizable donation made to support this forum. Thank you to everyone who ordered, and especially to moamps and Jens.
I will keep everyone updated as to the order status. The boards are due to ship to me June 10th, but my experience is that they are often faster than this.
oops, i think i messed up too. i need to add another set of 2SK389.
hopefully this wont confuse things. i assume i dont need to add another shipping, they will go on the same order.
hopefully this wont confuse things. i assume i dont need to add another shipping, they will go on the same order.
cowanrg, I have your additional order, no need to pay shipping twice. 🙂
I have just sent a confirmation email to everyone in the buy. You should receive them shortly. Those who had multiple orders or special requests should have received a second email confirming them.
The following persons had permanent fatal errors, and I could not send a confirmation. I do have your order in and paid.
cowanrg
Peter Daniel
Steve M (skjg)
I have just sent a confirmation email to everyone in the buy. You should receive them shortly. Those who had multiple orders or special requests should have received a second email confirming them.
The following persons had permanent fatal errors, and I could not send a confirmation. I do have your order in and paid.
cowanrg
Peter Daniel
Steve M (skjg)
i am UNABLE to change my email with paypal... i have my second email address on their, but it refuses to recognize it, so unless i cancel the account and re-open it, the email address remains.
so, my real address is:
cowanrg at mesanetworks dot com.
so, my real address is:
cowanrg at mesanetworks dot com.
tiroth said:
Hi Tyler,
I have just testet a PROTO board, and have found NO problem in the HP section regarding the x100 multiplier cap of 1 nF.
I still need to fully populate the board to test the different Q settings. When I have results I'll post them.
\Jens
Jens, This is not strictly about active cross overs and slightly "off topic" but I just thought it was the right time to congratulate your fine country on the forth coming marriage of Crown Prince Frederick of Denmark to his wonderful Aussie bride Ms. Mary Donaldson. Jonathan Bright (Australia)
Board options
I'm wondering if one of the options I'll have with the boards is to evaluate various brand/composition components side by side.
Will I be able to put the same value of Riken or Mills resistor in the board and listen to the qualities of each by changing a jumper? Is the same true for capacitors?
If so, this project will provide me with a "test bench" to choose those components that suit my ear. Those components that until now I've only heard others comment on.
I'm wondering if one of the options I'll have with the boards is to evaluate various brand/composition components side by side.
Will I be able to put the same value of Riken or Mills resistor in the board and listen to the qualities of each by changing a jumper? Is the same true for capacitors?
If so, this project will provide me with a "test bench" to choose those components that suit my ear. Those components that until now I've only heard others comment on.
Compensation capacitors?
Hello,
I am struggling to find a reasonably cheap source for the compensation capacitors (68 pF) used in the opamp modules... (polystyrene or mica or ..?).. but the 68 pF value seems to be among the less used ones... can this value be changed a bit?
Any suggestions appreciated
Cheers
Andrea
Hello,
I am struggling to find a reasonably cheap source for the compensation capacitors (68 pF) used in the opamp modules... (polystyrene or mica or ..?).. but the 68 pF value seems to be among the less used ones... can this value be changed a bit?
Any suggestions appreciated
Cheers
Andrea
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