Hello,
I'm a total newbie in the audio pro DIY world, my first project was a monitoring section as transparent as possible to really hear what I did in my mixes. For this purpose I made a full passive one with the added functionalities I need in my work.
Running some A/B tests, I found my module to not be so transparent...
Here's the setup :
Outputs of the Digidesign 192I/O to custom monitoring section to Dynaudio BM15A
To run tests, I connect directly the outputs of the monitoring sections to the inputs of the 192
The custom monitoring section include a "DACT" stepped attenuator (10K) and some switches to allow mutes, mono, L-R swapped, and phase reverse listening.
Here's a picture of the module (please don't laugh)
The suspects for me are :
1) Wires nature : I'm not sure to use the best appropriate wires, those are Cu oxygen free teflon isolated, but only one conductor...
2) Wires arrangement : Is it better to run the wires together
3) Ground connections : I'm not sure of what I done, I connect all the Pin 1 of XLRs to their own XLR chassis connector, connect the two ground pins of the attenuator to the pin 1 of the Left input, and because this is unbalance, I connect the pin 3 of the output XLR to their Pin 1.
4) Switches quality : I'm wondering about, because when I shortpass the signal path with the nearest attenuator switch (so I just go through 1 switch opposed to 5 for the normal signal path) the sound seems to loose some definition...
5) Impedance adaptation : I'm conscient that my realisation don't meet the impedance adaptation rules, I thought it was better for transparency to avoid buffer stages, to keep full passive, but maybe I'm wrong...
I apologise for my english which is about as good as my electronic knowledge, I hope to be clear enough.
Thanks by advance for answers, I hope my problem could be solve, do not be afraid to tell me the truth about my faults, I post here to learn...
I'm a total newbie in the audio pro DIY world, my first project was a monitoring section as transparent as possible to really hear what I did in my mixes. For this purpose I made a full passive one with the added functionalities I need in my work.
Running some A/B tests, I found my module to not be so transparent...
Here's the setup :
Outputs of the Digidesign 192I/O to custom monitoring section to Dynaudio BM15A
To run tests, I connect directly the outputs of the monitoring sections to the inputs of the 192
The custom monitoring section include a "DACT" stepped attenuator (10K) and some switches to allow mutes, mono, L-R swapped, and phase reverse listening.
Here's a picture of the module (please don't laugh)
The suspects for me are :
1) Wires nature : I'm not sure to use the best appropriate wires, those are Cu oxygen free teflon isolated, but only one conductor...
2) Wires arrangement : Is it better to run the wires together
3) Ground connections : I'm not sure of what I done, I connect all the Pin 1 of XLRs to their own XLR chassis connector, connect the two ground pins of the attenuator to the pin 1 of the Left input, and because this is unbalance, I connect the pin 3 of the output XLR to their Pin 1.
4) Switches quality : I'm wondering about, because when I shortpass the signal path with the nearest attenuator switch (so I just go through 1 switch opposed to 5 for the normal signal path) the sound seems to loose some definition...
5) Impedance adaptation : I'm conscient that my realisation don't meet the impedance adaptation rules, I thought it was better for transparency to avoid buffer stages, to keep full passive, but maybe I'm wrong...
I apologise for my english which is about as good as my electronic knowledge, I hope to be clear enough.
Thanks by advance for answers, I hope my problem could be solve, do not be afraid to tell me the truth about my faults, I post here to learn...