Behringer DCX2496 digital X-over

DCX2496 seems to be sold out everywhere and nobody knows when/if Behringer is going to deliver DCX2496 again. Behringer hasn't informed anything about a new substitutive product.

Does anyone know any other processor which could compete with Behringer.

Behringer is 2x3 channel processor, with ONLY 1 ms delay and it costs only 250 euros.

I have found processors with better quality (burrbrown DAC etc.) but they cost twice as much or they only have 2x2 channels and worst thing about them is long processing delay (DBX DriveRack PA 10ms delay!)
 
wiring the 220ohms resistor

The purpose of this resistor is to make impedance matching whith the coax cable normalized to 75 Ohms and the input of the dcx normalised a 110 ohms ('proffessional standard and twisted pair) . My firts connection with the cd by spdif interface was a twisted pair, result was good.I' change by the solution of the coax cable and i get parasite ex when switch on or off tuner and also sound whas not so clean then i' return to the simple twisted pair !
The best is to try the both solution.

JC BALTHAZARD
 
DIAR said:
DCX2496 seems to be sold out everywhere and nobody knows when/if Behringer is going to deliver DCX2496 again. Behringer hasn't informed anything about a new substitutive product.
with Behringer.




http://www.theplanetofsound.co.uk/homepage.asp?p=3 are still showing stock at 250euro, I bought mine from them last week.
Several websites are showing expected delivery from Behringer from as early as December to as late as Jan06, so if this is accurate just wait a few weeks, or buy from the UK 😉

Kev
 
DIAR said:
Short delay is very important for me because I intend to use a processor for bass unit only (XO frequency, low frequency gain, EQ to get rid of standing wave peaks).


My purchase decision was taken with the same thought of using it to xover and eq the bass only, but in practice there is so little degrading of the sound that I'll end up using it over the whole spectrum. You can't use the LeCleach settings using it to eq the bass only.

I'd like to buy the unit from Finland because of warranty issues.

I'd do the same, but maybe the wait won't be too long 😀

Kev
 
KevinTams said:


My purchase decision was taken with the same thought of using it to xover and eq the bass only, but in practice there is so little degrading of the sound that I'll end up using it over the whole spectrum. You can't use the LeCleach settings using it to eq the bass only.


This is what people keep telling me 😀

I have a possibility to buy a used DCX here in Finland. It's rather expencive but it's quite new and with warranty. Maybe I should go for it :bigeyes:

I've heard about LeCleach settings but I don't know any details. Are they for Behringer only or can they be used with any digital XO?
 
DIAR said:


I've heard about LeCleach settings but I don't know any details. Are they for Behringer only or can they be used with any digital XO?


http://www.diyaudio.com/forums/showthread.php?postid=683896#post683896

Could be wrong (what's new) but I suspect this has been optimised for the DCX as it uses the DCX's auto alignment feature during the setup. I've not used this yet as I'm still not using the DCX to it's full potential, I still need another stereo amp to drive my tweeters, so far I'm bi-amped. :bawling: Next project is another amp then we'll see.

Kev
 
KevinTams said:



http://www.diyaudio.com/forums/showthread.php?postid=683896#post683896

Could be wrong (what's new) but I suspect this has been optimised for the DCX as it uses the DCX's auto alignment feature during the setup. I've not used this yet as I'm still not using the DCX to it's full potential, I still need another stereo amp to drive my tweeters, so far I'm bi-amped. :bawling: Next project is another amp then we'll see.

Kev

Hi Kevin

No, that's wrong, Jean Michel Le Cleach's calculations have nothing to do with the DCX itself. They have been elaborated for simulation of the "ideal" crossover from a phase point of view.

They will work with ANY digital crossover (RANE, BSS and the like) as far as specific slopes, crossover points and delays are set up properly. Of course the crossover must allow driver alignment. This technique also works for 2 way systems. It will allow you to adjust roughly your xover without the need of a microphone and time alignment measuring software. You won't need to use the DCX2496 auto-align facility, and I even think that doing so would impair the result. Let's remind the basic principles of his method to all the peeps in here (we are talking about adjusting a 3 ways system) :


- choose Butterworth 3rd order filter type (i.e. 24db/oct)

- set DCX2496 xover mode to FREE (this is VERY important, if you choose LINK instead, whole procedure is pointless)

- woofer xover point with midrange must be multiplied by 0.87 to obtain new xover frequency.

- midrange xover point with woofer must be multiplied by 1.14 to obtain new xover frequency.

- midrange xover point with tweeter must be multiplied by 0.87 to obtain new xover frequency.

- tweeter xover frequency must be multiplied by 1.14

- Now whe shall calculate woofer offset relatively to midrange driver : it must be 0.22 times the crossover frequency, e.g. if woofer's xover point is 320Hz, woofer should be "set forward" by [344meters second / 320Hz * 0.22 *1000] = 236mm .

This is where the beauty of the Behringer is : it's so easy to enter the delay in millimiters in the xover parameters !


Enjoy !


Now, if you want to measure and verify what you are doing you may buy an ECM8000 microphone, plug it into your PC through a preamp and use Adobe Audtion 1.5 along with Aurora plugins, and then try to fine-tune drivers alignment relatively to each other to obtain a perfectly consistent wave front from your speakers.

I've seen Jean Michel Le Cleac'h performing this task for us in Paris (last March) on the 4 way Onken/JBL/TAD system : you can believe me, it definitely takes a nice bit of experiment if you want to succeed 😱


Thierry




.
 
i have a quick question ..

Are we able to connect this unit ( input)
from digital consumer SPDIF signal ?

is there a way to do so ?

cause i believe that the sound card i am looking at,
don't output AES/EBU professional signals ...

will i have a problem with that ?




And then, is there a way to do DRC with this unit or not?
cause i can remember that some of you discussed this somehwere withing this thread ( i'm lost here haha )

thanks again
 
1) Yes you can do so by building a cable with an XLR termination at one end and an RCA connector at the other. Use a 75ohms cable (video cable is ok). XLR pins connections are described in the manual. The only thing is to keep the cable pretty short, i.e. less than 3ft.

Look here what Behringer says about SPDIF to AES


2) And no, you can't do DRC with the DCX2496. Use the DEQ2496 instead, brilliant tool for this purpose, although the DCX2496 offers parametric equalization functions.



Cheers
 
This RCA/XLR-Question pops up from time to time. I am curious that so much is written about the DCX, but there is no agreement in a primitive question, i.e how to connect this thing to a CD player using Digital connection?

I have asked this couple of times, so maybe some of you getting tired of my repeated question (sorry for that).

Here are example of different advise that I noted on various Forums regarding DCX2496 XLR digital input from RCA from CD/DVD.

Example-1:
-------------
No specific issue regarding XLR digital in for DCX. Just connect XLR/RCA pins acccording to Behringer manual.


Example-2: (Kuei)
--------------
The RCA connector is not 75 Ohm Charateristic impedance,
reflections will increase jitter.
The input of the DEQ/DCX2496 is 110 Ohm load, this is a mismatch
with the S/P-DIF cable which will increase jitter, yes, you will get
a "lock" on the signal, but sound quality will suffer.

Both DEQ8024 and DEQ2496 accept S/P-DIF Data, but you have an impedance mismatch. You need to make up a cable with an RCA Plug on one side in coax and an XLR on the other side.

Pin on RCA connects to Pin 2 XLR, Sleeve on RCA connects to Pin 1 & Pin 3 together. Connect a resistor of 220 Ohm across Pin 1 & 2. Voila, S/P-DIF in.


Example-3: (Kuei - in this thread earlier p.42)
---------------------------------------------------------
"RCA-XLR. Simply attach your coax cable to pin 2 & 3 of the XLR plug and solder a 220R resistor across the pins as well."


Example-4:
--------------
Some people strongly suggests some kind of tranformer/adapter.


By the way, I have heard several person use the Thoretsen Mod (Example-2) with good result. But again, Thorsten (Kuei) here in this thread suggests another connection in Example-3 above? Is it the same thing?



LageB
 
Konnichiwa,

LageB said:
By the way, I have heard several person use the Thoretsen Mod (Example-2) with good result. But again, Thorsten (Kuei) here in this thread suggests another connection in Example-3 above? Is it the same thing?

It is the same thing, except the second suggestion with pin 1 unconnected leaves the input floating. I found this better in many cases as often both DCX/DEQ and the transport have "earth".

I guess the guideline is that if your transport uses a 3-Pole mains cable do not connect 1 & 3, if it uses a 2-Pole mains cable do connect them.

A transformer adaptor is not bad idea either but quality can be an issue.

Sayonara
 
mmm ok thanks i understand now for the spidf and aes match ..

The DEQ seems to accept optical spdif?
do you think that i could use the optical IN
and use the AES(XLR) out to the DCX ?

do you recommend using the 2 item in serie ?

i guess that having full digi crossover/EQ and DRC would be awsome ..

is there some avantage on the DEQ EQ versus the one on the DCX?


Could you provide a link on how to DRC with the DEQ ?
just wanna get an idea of how it works ..

🙂
 
Konnichiwa

JinMTVT said:
The DEQ seems to accept optical spdif?

It does.

JinMTVT said:
do you think that i could use the optical IN
and use the AES(XLR) out to the DCX ?

Sure.

JinMTVT said:
do you recommend using the 2 item in serie ?

If you have use for both, sure.

JinMTVT said:
is there some avantage on the DEQ EQ versus the one on the DCX?

The DEQ is a mastering/remastering equaliser, the DCX is a Crossover with the addition of equalisation to correct for driver imperfection. So, they have very different purposes and are complementary in purpose.

JinMTVT said:
Could you provide a link on how to DRC with the DEQ ?

There is a little article on my yahoo group:

Suggested target curves and setup techniques for Pro Audio Digital Equalisers in home systems for Room correction and general system EQ

Yahoo groups requires you to register before you can access this, nothing to do with me. When Yahoo allowed non-members to access files they where open to all.

There are also a number of other articles by a variety of authors in the Files section of this group, may be worth snooping around a little.

Sayonara