Behringer DCX2496 digital X-over

[byteboy]

Hi Andrea,

I bought mine in a German music equipment webshop called "Musik Produktiv" for € 449,--

I paid with creditcard, had it delivered in 5 day's; fairly quick if I compare it to what other people are posting.



Henry.

[byteboy]

Hi Petter,

What I gather from your post is that your mod's (quite a list..) are aimed at:

- enhanced powersupply quality (noise, decoupling, ripple)
- DAC quality upgrade
- Clock quality / jitter situations
- Analog signal quality

In fact the only things that remain unchanged are the DSP processing part and the ADC's?!


Maybe another option woud be (speaking being not too familiar with the matter however) to leave the thing as is and only bring out the (serial?) digital inputs/clocks to the DAC's (as SPDIF/AES-EBU?) and do an external set of DAC's with your spec power supply, opamps, condensators etc. ??
What about that? (RobM? )

Just a thought, got to have it running as it is now first.....

Henry.

[byteboy]

Petter,

Forgot, you could also (while your at it......) implement your wish for a (digital?) 6 channel volume control on the outboard stuff......?


Henry.

[Petter]

Henry,

Your comments are almost completely correct. What is NOT changed is:

Input receiver
Sample Rate Converter
DSP chip
Control circuitry, display etc.

It is unlikely that the DAC chips are in fact receiving S/PDIF. They are more likely receiving BCLK, L/RCLK and SDATA (each). One of my first thoughts was to bring these out as you suggested. This is definitely a valid way to do things, particularly if you want the unit kept mostly stock, an dif you are able to move the clock out to the DAC chips as well (and feed it back to Behringer, and possibly even transport).

I should be getting mine tomorrow but I don't have anything to play with yet

How do you set your master volume???? I am planning to use Apox (www.dipchipelec.com)

Petter

[slowmotion]

Hi all

This seems to me to be a fairly substantial overhaul of the Behringer , what would a rough estimate of cost for the parts be?


cheers

[RobM]

I guess one could hook up three CS8405s to the 3-wire serial audio data going into the DACs to have 3 SPDIF or AES3 outputs instead of the analog section.

[byteboy]

Costs?

I have no idea.


Petter

For the moment I'll have to go with the analog inputs and accept the extra A/D conversion, feeding it from my Sony TA-E9000ES pre-amp.

After I have finished my active speaker project which I am currently working on, I am going to have a closer look at my transport/pre-amp. (Maybe also do a SPDIF-out on my preamp?...... )

I had a look at the Apox site, good stuff!!

Henry.

[byteboy]

That was my idea as well Rob to maybe do this with some SPDIF encoder "paralel" to inputs to the internal DAC's
(Not sure if this was possible and how to do this though)

That was why I mentioned you

This could indeed be an elegant way to use use some higher quality external (remote) DAC and analog circuitry while keeping the unit mostly original.

Henry

[byteboy]

I bought some XLR-to-RCA plug adapters TODAY AND hooked up my DCX2496 with my CD-player output (analog) and tried a few setups.
It was realy nice to see the peak-/level output on my PC!!!

Thought maybe it would be nice to show you guys a screen capture........

Henry

[Petter]

Costs:
DAC chips at $10-15 each. Need minimum of 3 for 6 channels. I am considering using 4 units (per 2 channels) (but need to verify that it works first.
Power supply mods, $10-300 depending on what you do and how "high end" you go with esoteric parts.
Op-amp replacement, anything from $.5 to $16 per unit -- you need at least 6 pieces.
Power line filtering, anything from zero (steal from old computer parts) to $60. You need one such unit.
Resistors, anything from $.5-$10 per unit (need up to 24 units).
Connectors: These are quite expensive -- can easily get to $10-20 per channel (need 6 ....). Then again, one can use what is already in there.
Clock upgrade -- can cost anywhere from near zero to commercial upgrades at hundreds of dollars. www.lcaudio.com is one such vendor. The highest end clocks are not typically available in the general market.

Most of the cost is your own time.

If you don't have access to PCB manufacturing, that could be troublesome as well. For me, cost there is essentially zero. For you, this might be troublesome. Also SMD work is painful.

Petter