tmoneygetpaid
Member
- Joined
- Feb 23, 2014
- Messages
- 5
Hey,
I'm working in an audio school, and one of the teachers when introducing mics and pres regularly positions a number of mics on a sound source, and switches between the mics and pres to give a taste of how they color the sound. We saw the Rad*al products that allow easy switching between mics and preamps, and I thought I could put something together a lot cheaper that got close enough.
Here is my initial draft-- I haven't done any real designing before, just repair, so any general feedback or problems anyone points out would be appreciated. It's somewhat unclear here, but the switches are 3P4T (1 pole for LEDs, 2 for the 2 audio-bearing connections; switching between 4 mics and 4 preamps). The phantom switches are 4 individual SPDT switches. The 48V converter is the Fivefish 12-to-48v adapter PCB they sell under the FABModules banner. Or I'd build a 48V PSU from a PCB kit.
I read through the old posts on similar designs, and the one issue I foresee is popping when switching. Will this happen when both preamp output and mic input are switched? Anything else I can do to minimize/ eliminate popping?
Also, is there a benefit to using relays over these switches? Switches just seem simpler and more cost-effective. I also saw mention of an old Analog Devices IC that does popless switching, but it's been discontinued and seems to only switch between two ins/ outs. Is there anything similar that doesn't need logic (over my head).
Thanks.
I'm working in an audio school, and one of the teachers when introducing mics and pres regularly positions a number of mics on a sound source, and switches between the mics and pres to give a taste of how they color the sound. We saw the Rad*al products that allow easy switching between mics and preamps, and I thought I could put something together a lot cheaper that got close enough.
Here is my initial draft-- I haven't done any real designing before, just repair, so any general feedback or problems anyone points out would be appreciated. It's somewhat unclear here, but the switches are 3P4T (1 pole for LEDs, 2 for the 2 audio-bearing connections; switching between 4 mics and 4 preamps). The phantom switches are 4 individual SPDT switches. The 48V converter is the Fivefish 12-to-48v adapter PCB they sell under the FABModules banner. Or I'd build a 48V PSU from a PCB kit.
I read through the old posts on similar designs, and the one issue I foresee is popping when switching. Will this happen when both preamp output and mic input are switched? Anything else I can do to minimize/ eliminate popping?
Also, is there a benefit to using relays over these switches? Switches just seem simpler and more cost-effective. I also saw mention of an old Analog Devices IC that does popless switching, but it's been discontinued and seems to only switch between two ins/ outs. Is there anything similar that doesn't need logic (over my head).
Thanks.