I have a pair of JBL XPL 200 and want to use bi-amping with an active crossover. I can't find the dx-1 and am looking for an alternative. I found an answer to the question in another forum, but I can't register there.
- in post #4 "pos" says, "I investigated the voltage curves published here some time ago, and ended up with the following:
Low-pass: 2nd order, fc=300Hz, Q=0.4
High-pass: 2nd order, fc=350Hz, Q=0.67
This can be achieved quite easily with DSP crossovers, or by building specific Sallen-Key circuits if you want to stay analog."
- in post #10 says:
"The 2nd order filters I listed a few posts above cannot be directly executed with a DCX as the unit does not have variable Q second order filters.
You can get pretty close using available filters together with an EQ point though :
Low-pass: 2nd order, fc=300Hz, Q=0.4
becomes:
Low-pass: "L-R 12", fc=303Hz (closest available frequency step)
EQ: -1.9dB, Q=0.5, fc=303Hz
High-pass: 2nd order, fc=350Hz, Q=0.67
becomes:
High-pass: "Butt 12", fc=352Hz (closest available frequency step)
EQ: -0.5dB, Q=0.71, fc=352Hz".
My question is how does he find that 303Hz and 352Hz when the picture from where he says he found the values, shows a crossover at around 260Hz?
Someone told me that with DCX2496 crossover i will get bad results and i am better off using analog active crossover. What is your opinion on analog crossover vs DSP?
- in post #4 "pos" says, "I investigated the voltage curves published here some time ago, and ended up with the following:
Low-pass: 2nd order, fc=300Hz, Q=0.4
High-pass: 2nd order, fc=350Hz, Q=0.67
This can be achieved quite easily with DSP crossovers, or by building specific Sallen-Key circuits if you want to stay analog."
- in post #10 says:
"The 2nd order filters I listed a few posts above cannot be directly executed with a DCX as the unit does not have variable Q second order filters.
You can get pretty close using available filters together with an EQ point though :
Low-pass: 2nd order, fc=300Hz, Q=0.4
becomes:
Low-pass: "L-R 12", fc=303Hz (closest available frequency step)
EQ: -1.9dB, Q=0.5, fc=303Hz
High-pass: 2nd order, fc=350Hz, Q=0.67
becomes:
High-pass: "Butt 12", fc=352Hz (closest available frequency step)
EQ: -0.5dB, Q=0.71, fc=352Hz".
My question is how does he find that 303Hz and 352Hz when the picture from where he says he found the values, shows a crossover at around 260Hz?
Someone told me that with DCX2496 crossover i will get bad results and i am better off using analog active crossover. What is your opinion on analog crossover vs DSP?