hello, I am in the process of tweaking my dcx2496 crossover but I have some lacks and doubts about the mods. I would be very happy to hear some audio specialists' advice:
- AES input: I would like to transform it to SSI only.
*I can remove the transformer and connect it to the CS8420 directly with a 75Ohms parallel resistor and small cap on RXN (don't like it)
*I can use an RCA to XLR adapter (don't like it)
*I can do nothing and it "may" work (don't like it)
I was wondering if I could keep the original transformer (PE65612) and simply change the 110 for a 75Ohms resistor to keep the security of the transformer. Is there something to be done on the CS8420 to work smoothly with spdif signal? (I read in the datasheet about the CS8420 hardware mode which should be "1" for AES and "2" with SSI)
- JRC4580 IN and OUT: I have a stock of OPA2604AU
I was planning to change all inputs OPA's and only last stage of Outputs with the OPA2604 because they have a fast response and are very low noise. I have some fears about a power consumtion raise drained on the power supply.
- All 47uF decoupling capacitors: replaced with 100uF Elna silmic2
I am not sure that sound will be improved. I have a few 100uF/25V instead of 47uF/25V, I was thinking to put the 100uF with a 100nF in parallel, I have no idea if it will improve or decrease quality. I think it will as 100uF have a bit lower esr than the 47uF but they have a lower frequency cut in return.
- All JRC supply capacitors with low esr Tantalum capacitors 22uF/16V with 100nF Y7R in parallel instead of the chemical 10uF/25V. again I am not sure that increasing the capacitor value will affect the dcx in good or bad.
- Changing 7815 & 7915 power supply, 2x7805 Dsp board regulators with LDO's
- Install a USB to RS485 module in the chassis for an easyer connection on the laptop.
- Install a small 3 wire fan and PWM controller on the power supply side
- Changing the clock for low jitter XO, when I will be wealthy...
- I am waiting for some DIT4096 samples to build a pcb to drive 3 SPDIF transeivers on the 3 outputs. this is a project to drive digital amplifiers with a DAC conversion on the ultimate stage, see the power stage (or no conversion at all using D class amps).
thank you for your help.
- AES input: I would like to transform it to SSI only.
*I can remove the transformer and connect it to the CS8420 directly with a 75Ohms parallel resistor and small cap on RXN (don't like it)
*I can use an RCA to XLR adapter (don't like it)
*I can do nothing and it "may" work (don't like it)
I was wondering if I could keep the original transformer (PE65612) and simply change the 110 for a 75Ohms resistor to keep the security of the transformer. Is there something to be done on the CS8420 to work smoothly with spdif signal? (I read in the datasheet about the CS8420 hardware mode which should be "1" for AES and "2" with SSI)
- JRC4580 IN and OUT: I have a stock of OPA2604AU
I was planning to change all inputs OPA's and only last stage of Outputs with the OPA2604 because they have a fast response and are very low noise. I have some fears about a power consumtion raise drained on the power supply.
- All 47uF decoupling capacitors: replaced with 100uF Elna silmic2
I am not sure that sound will be improved. I have a few 100uF/25V instead of 47uF/25V, I was thinking to put the 100uF with a 100nF in parallel, I have no idea if it will improve or decrease quality. I think it will as 100uF have a bit lower esr than the 47uF but they have a lower frequency cut in return.
- All JRC supply capacitors with low esr Tantalum capacitors 22uF/16V with 100nF Y7R in parallel instead of the chemical 10uF/25V. again I am not sure that increasing the capacitor value will affect the dcx in good or bad.
- Changing 7815 & 7915 power supply, 2x7805 Dsp board regulators with LDO's
- Install a USB to RS485 module in the chassis for an easyer connection on the laptop.
- Install a small 3 wire fan and PWM controller on the power supply side
- Changing the clock for low jitter XO, when I will be wealthy...
- I am waiting for some DIT4096 samples to build a pcb to drive 3 SPDIF transeivers on the 3 outputs. this is a project to drive digital amplifiers with a DAC conversion on the ultimate stage, see the power stage (or no conversion at all using D class amps).
thank you for your help.