Hi Ergo,
re your proto schematic;- the two transistor circuits appear to be shunt regulators. Are the driver transistors transposed?
You have three passive lopass RC filters in the opamp version of the circuit. Before you complete your sound quality analysis, would you care to tease us with the RC time constants while we await the outcome and final schematic?
re your proto schematic;- the two transistor circuits appear to be shunt regulators. Are the driver transistors transposed?
You have three passive lopass RC filters in the opamp version of the circuit. Before you complete your sound quality analysis, would you care to tease us with the RC time constants while we await the outcome and final schematic?
This is the actual measured output response from channels
1 and 2 - blue for bass C1= 47uF SilmicII
3 and 4 - red for mid C1=2,2uF film
5 and 6 - green for tweeter C1=2,2uF film
Note that the vertical division is 2dB total so actually @
20kHz the response is down only -0.2dB
Ergo
1 and 2 - blue for bass C1= 47uF SilmicII
3 and 4 - red for mid C1=2,2uF film
5 and 6 - green for tweeter C1=2,2uF film
Note that the vertical division is 2dB total so actually @
20kHz the response is down only -0.2dB
Ergo
Attachments
Thmartin said:Hi Stefano,
Unfortunately I haven't the schematics of the DSP8024, although I owned one in the past (replaced with a DEQ2496 now).
I reckon it should be a lot different from the DCX as is doesn't share the same DACs at all.
Now, back to the DCX2496 : I am working on a separate power supply for the analog stage of the DACs (5v analog) because I really do not like what Behringer has implemented there
Have a look at this : Power supply
(sorry about the french, when I have time I'll translate the whole site) :
Good luck,
Thierry
.
http://thierry-martin.9online.fr/tweakdcx/5Vdcx.gif
4.3v Zener and Vbe drop dont make 5V , it would make more like 3,6v...
From rectifier on the left side...... base voltage on NPN transistor with emitter output. the base voltage is higher than the emitter voltage
I meant you should change the Zener NOT the transistor. The program you are using; i think its time to change that as well as reading som tek stuff.
Maybee the rest of drawings need a check as well.
Maybee the rest of drawings need a check as well.
Re: DCX2496 availability
You'll have to scoop them off ebay.
They may never be in production again. I've heard delivery dates change....at least 4 times now. How long has it been since they were easily available? well over 6 months now, more like a year.
I've tried to get a straight answer from Behringer (multiple times), and was told by the guy who is responsibe for answering that question..that he gets about 4-6 phone calls a day on the DCX2496. No straight answers and no delivery date. People ran out of anger on this one, long ago. We are now simply burnt out from the wait.
The product was ahead of it's time.
mbroyles said:
You'll have to scoop them off ebay.
They may never be in production again. I've heard delivery dates change....at least 4 times now. How long has it been since they were easily available? well over 6 months now, more like a year.
I've tried to get a straight answer from Behringer (multiple times), and was told by the guy who is responsibe for answering that question..that he gets about 4-6 phone calls a day on the DCX2496. No straight answers and no delivery date. People ran out of anger on this one, long ago. We are now simply burnt out from the wait.
The product was ahead of it's time.
DriveRack PA
No digital in, twice the price, and, doesn't sound quite as good. I sold mine when I got my DCX.
No digital in, twice the price, and, doesn't sound quite as good. I sold mine when I got my DCX.
Hi,
maybe I should auction my DCX off at twice the price.
Then they are nearly equivalent, except that no digital in and worse maybe not so good sound wise.
maybe I should auction my DCX off at twice the price.
Then they are nearly equivalent, except that no digital in and worse maybe not so good sound wise.
Re: DriveRack PA
Please do not forget the DriverackPA essentially has (except for the digital in) features of the DCX and DEQ combined. I love the auto eq feature which flattens in room response. That's better value than the DCX alone.
sendler said:
Please do not forget the DriverackPA essentially has (except for the digital in) features of the DCX and DEQ combined. I love the auto eq feature which flattens in room response. That's better value than the DCX alone.
"That's better value than the DCX alone."
Not if you need 6 outputs for stereo 3-way or 3-ch 2-way
Not if you need 6 outputs for stereo 3-way or 3-ch 2-way
The DCX has 3 inputs and 6 outputs to do as I described; you'd have to buy multiple Driverracks to get that.
I'm using Pass BZLS to drive the input. I still get to power my 3 way speaker in full active mode. What's the issue ?
http://www.dbxpro.com/PA/PA.htm
http://www.dbxpro.com/PA/PA.htm
Thanks for the link.
I see that the Driverack will do 2x3, but I don't see that it does 3X2, which is what I want to biamp L/C/R's.
The DCX has a third input to allow that.
I see that the Driverack will do 2x3, but I don't see that it does 3X2, which is what I want to biamp L/C/R's.
The DCX has a third input to allow that.
The DCX2496 is still available in Japan
"universal voltage" Model, you'll have to download the Owners manual from the Behringer site, but otherwise "plug and play"
Email me if you want to followup
Graham Ware
gware@eudoramail.com
Tokyo
"universal voltage" Model, you'll have to download the Owners manual from the Behringer site, but otherwise "plug and play"
Email me if you want to followup
Graham Ware
gware@eudoramail.com
Tokyo