Modify behringer DEQ2496?

[densen2002]

DEQ2496 inside

http://rapidshare.de/files/29569280/eos.rar 10M

[FLECOM]

So I drifted over to the Slim Devices website, and they are coming out with a new device http://www.slimdevices.com/pi_transporter.html called the transporter... which they claim uses the "Miracle DAC" - AK4396

ok, so, I have played with AKM dacs before, since my behringer has an AK4393... so i head over to AKM's website... and it looks like a really nice chip... and it looks like its pin-per-pin compatable with the 4393, 4394, and 4395!

but the best part, it needs NO output caps! none at all!!!



I am definately going to see about trying to find some of these IC's and try swapping out the DAC in my DEQ2496 and making a new, capacitor-less, LPF and see what happens

[Nature B0y]

I've got a SRC2496, which supposedly uses the same 4393 DAC, and I was looking to do that DAC swap as well, or at least bumping up to the 4395. Have you found a source for small quantities of the AKM DACs? The only place I've found so far is DIP international in the UK, and their minimum quantity seems to be 50...

One thing to think about is that those filter caps *are* in your signal path, even though there's no DC blocking caps required. Obviously, it's easy enough to get high quality caps in there, but I was thinking of going passive with a transformer, say a Lundahl line-level or somesuch.

[FLECOM]

well, they are not really directly in the signal path dc blocking, just part of the filter... so some nice caps and you should be good to go... or you can just omit the filter entirely I guess...

I have not been able to source them in small quantities yet... working on it

[wastl]

Originally posted by densen2002
DEQ2496 inside

http://rapidshare.de/files/29569280/eos.rar 10M

densen2002, the file has gone. May I ask for a repost (or email)?

Thanks!

[janneman]

Originally posted by FLECOM
[snip]but the best part, it needs NO output caps! none at all!!!
[snip]

Neither does the '93, if you use the balanced to se converter you showed and which is shown in the data sheet. Both the '93 and the '96 need coupling caps if used balanced (their outputs sit on 2.5V DC).

Jan Didden

[kepa1]

Originally posted by FLECOM
i was just wondering about output transformers, instead of the $200 dac output transformers that were linked to two pages ago couldent you use these sowter transformers and still get a balanced line out?

http://www.sowter.co.uk/specs/3603.htm

Here is what Sowter answered when asked about it:

Hello Alain

3603 would be ideal provided the output impedance of the DAC is 1000
ohms or less. The load should be as high as possible so your high
impedance amp will be ideal.

http://www.sowter.co.uk/acatalog/SOW...CERS_2.html#a9


Best regards

Brian Sowter
SOWTER AUDIO TRANSFORMERS (E A Sowter Ltd)

This transformer will handle the balanced/unbalanced conversion as well. That must be a good candidate but I definitely don't have the knowledge to really recommend it

[Spartacus]

The higher priced 5069 just below it will provide lower distortion in the bass.

Dan

[FLECOM]

Originally posted by janneman



Neither does the '93, if you use the balanced to se converter you showed and which is shown in the data sheet. Both the '93 and the '96 need coupling caps if used balanced (their outputs sit on 2.5V DC).

Jan Didden

according to the datasheet the 96 dosent need any dc blocking on the output at all...

[Spartacus]

Originally posted by FLECOM


according to the datasheet the 96 dosent need any dc blocking on the output at all...

It will need a cap if you use only one of the outputs from the chip e.g. the + OR the -, in singled ended fashion.

Dan