Also to update, The endler mod states "[FONT=Arial,Helvetica,sans-serif] If you want to try it yourself, the wires that you need starting from the red are 7,8,10,11,L+,L-,R+,R- for the DEQ." Im just looking for wiring directions.
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Those chips are very small and fragile to heat. Not a good place to practice.
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The signal for the direct out mod is sent to the caps by cutting open the ribbon cable. If you start counting at the red wire, (which is the opposite way of counting compared to the schematics) L+ is the 7 wire, L- is 8, R+ is 10, R- is 11. The 4395 requires lifting leg 2 to supply a 5v instead of the 3.3v which the 4393/ 4396 use.
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Behringer 2496 direct out mods
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Those chips are very small and fragile to heat. Not a good place to practice.
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The signal for the direct out mod is sent to the caps by cutting open the ribbon cable. If you start counting at the red wire, (which is the opposite way of counting compared to the schematics) L+ is the 7 wire, L- is 8, R+ is 10, R- is 11. The 4395 requires lifting leg 2 to supply a 5v instead of the 3.3v which the 4393/ 4396 use.
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Behringer 2496 direct out mods
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I thought there was more than 7,8,10 and 11? Also how do they connect to the caps? And what size caps, keeping in mind this is a deq not dcx. The link above has tiny pictures and no schematics. 🙁 is there any way we can clarify where the wires actually connect? Thanks so much for the help!
simple
The direct out for a DEQ is about as simple as a mod gets. Just cut the appropriate wires from the ribbon as mentioned above and send the signal from the dac board (in the middle of the DEQ) side through a cap to the appropriate output pins after cutting them and bending the part of the pin conductor that comes up from the board to make pins 3 and 2 of the connector open. Don't bend the part of the metal that is connected to the output connector as it will snap off way up inside. Bend only the board side.
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Any cap 2uf or larger will do. Better caps sound better. I like 3uf of the Dayton foil caps.
The direct out for a DEQ is about as simple as a mod gets. Just cut the appropriate wires from the ribbon as mentioned above and send the signal from the dac board (in the middle of the DEQ) side through a cap to the appropriate output pins after cutting them and bending the part of the pin conductor that comes up from the board to make pins 3 and 2 of the connector open. Don't bend the part of the metal that is connected to the output connector as it will snap off way up inside. Bend only the board side.
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Any cap 2uf or larger will do. Better caps sound better. I like 3uf of the Dayton foil caps.
20
That is actually 20. Because I couldn't fit 24.😀
That makes 2.5uf per leg of the paralleled .47uf Dayton foils.
That is actually 20. Because I couldn't fit 24.😀
That makes 2.5uf per leg of the paralleled .47uf Dayton foils.
Oh wow! So could I just fit 4x4uf or 4x3uf caps in there? Is there any reason you never did that? Thanks!
Single ended?
Do you use balanced connections or XLR to RCA adapters? If you don't need balanced you can just leave pin 3 open and only use two caps.
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I use the Dayton foils because they are by far the best sounding cap out of tens of other caps that I have tried. They are huge though and the largest size is .47uf so I have to parallel.
Do you use balanced connections or XLR to RCA adapters? If you don't need balanced you can just leave pin 3 open and only use two caps.
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I use the Dayton foils because they are by far the best sounding cap out of tens of other caps that I have tried. They are huge though and the largest size is .47uf so I have to parallel.
Im balanced into a QSC CX404 amp. Looks like I will be getting 20 of these too heh. Speaking of that, for the ground on the XLR's, you are using caps on that? Will I have to tap into 1 or 2 more wires on the ribbon?
Thanks so much for the help, now to find somewhere that will ship these to canada at a reasonable rate!
Can someone tell me the value of the capacitors and resistors used to bypass the output stage. I have a deq2496 on order that should arrive this week.
Thanks for any help
Thanks for any help
I will be using the output through RCA connector so I guess I only need one cap per channel. What do you suggest?
My DEQ Modification experience was :
1. Remove spdif input transformer, change to mkp capacitor 10 nf, by pass by digital cable belden datatwist 1701a to input receiver.
2. Change dac to ak 4395, more detail and laid back ( make additional 5 volt ps ).
3. Change capacitor in digital ps and analog by pass to silmic or cerafine.
4. Output modification :
a. W op amp, change bypass capacitor from standard to better. Perchannel XLR if memory serve me, has 3 dual op amp NJR 4558, you can convert from balance to unbalanced, by joint cold pin to ground ( see user manual). Another modification is change op amp to better quality, or reduce from 3 op amp per channel to 1 op amp perchannel.
b. Wo op amp. AK 4393 4395 has V out, you can feed to RCA connector through foil capactior, or make simple B1 buffer. Don't connect cable to dac leg, very fragile.
Sorry to poor english.
1. Remove spdif input transformer, change to mkp capacitor 10 nf, by pass by digital cable belden datatwist 1701a to input receiver.
2. Change dac to ak 4395, more detail and laid back ( make additional 5 volt ps ).
3. Change capacitor in digital ps and analog by pass to silmic or cerafine.
4. Output modification :
a. W op amp, change bypass capacitor from standard to better. Perchannel XLR if memory serve me, has 3 dual op amp NJR 4558, you can convert from balance to unbalanced, by joint cold pin to ground ( see user manual). Another modification is change op amp to better quality, or reduce from 3 op amp per channel to 1 op amp perchannel.
b. Wo op amp. AK 4393 4395 has V out, you can feed to RCA connector through foil capactior, or make simple B1 buffer. Don't connect cable to dac leg, very fragile.
Sorry to poor english.
I would suggest carefully reading Jan Didden's article on modifying the DCX 2496 (AudioXpress, but there are copies online). It has the same issues. BTW are you using a pre-amp with this?
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Thanks for the reference. I will look it up. I am going directly into an amplifier that has a step attenuator on the imput.
Okay, the reason I asked about the pre-amp was due to considerations of gain. The DEQ if you you use the + and - legs will have an output voltage of about 1.75 V rms. If you only use 1 leg and a ground, then the voltage drops in half and you lose 6dB.
You mentioned only blocking DC on one leg. You might want to re-consider this depending on your gain structure. You may need both legs to get a sufficient signal.
BTW, Jan's approach is a good one, an alternative would be a transformer coupled output. This would block the DC and also (perhaps) provide some low pass anti-aliasing filtering. Unfortunately, you get what you pay for. Transformers will range in price from $10 to $200 per channel.
Many threads to read on that topic, but replacing the analog output section is certainly a good idea, IMO
You mentioned only blocking DC on one leg. You might want to re-consider this depending on your gain structure. You may need both legs to get a sufficient signal.
BTW, Jan's approach is a good one, an alternative would be a transformer coupled output. This would block the DC and also (perhaps) provide some low pass anti-aliasing filtering. Unfortunately, you get what you pay for. Transformers will range in price from $10 to $200 per channel.
Many threads to read on that topic, but replacing the analog output section is certainly a good idea, IMO
Hey guys I have a few questions...
My system sounds great, currently consists of DEQ2496, hk3490 as preamp, QSC CX404 as amp and paradigm S8's.
The one problem I have is some of my 24 bit flac's have much more dynamic range than my mp3's (of course) therefore the 24 bit flacs sound much more quiet alot of the time.
I understand that I should be boosting my digital level for my flacs to get maximum resolution. But for my mp3s they will clip at a digital level on the DEQ then. I'm always tweaking my computer volume to get it to not clip for different types of media.
The AEQ in the 2496 found a 10db gap around 120hz in my room and is correcting for it, This is of course the cause of the issue.
If im lazy I can attenuate on my DEQ to reduce the level in, but I lose my extra resolution with 24 bit stuff.
Any suggestions on what to do? =/
My system sounds great, currently consists of DEQ2496, hk3490 as preamp, QSC CX404 as amp and paradigm S8's.
The one problem I have is some of my 24 bit flac's have much more dynamic range than my mp3's (of course) therefore the 24 bit flacs sound much more quiet alot of the time.
I understand that I should be boosting my digital level for my flacs to get maximum resolution. But for my mp3s they will clip at a digital level on the DEQ then. I'm always tweaking my computer volume to get it to not clip for different types of media.
The AEQ in the 2496 found a 10db gap around 120hz in my room and is correcting for it, This is of course the cause of the issue.
If im lazy I can attenuate on my DEQ to reduce the level in, but I lose my extra resolution with 24 bit stuff.
Any suggestions on what to do? =/
Found the article:
http://www.linearaudio.nl/Documents/dcx passive article.pdf
I used Figure 2 without the munting relais.