phishman13
Well-known member
Hello everyone.
I am attempting to do a little R&D for a simple mixer type thing. For recording, it would be used as basically a collection of channel strips with direct outs with routing for a cue mix. For mixing, it will be used as a normal mixer.
My question is about the input circuitry for the channel.
I want a simple line input with a pad, polarity reverse, and a line trim. I would like to use the THAT 1200 line reciever for this situation. Since the input will be fed from either a mic preamp or an audio interface, what are the odds that I will ever need a pad? (even for killing a preamp for distortion purposes and then cut the level to not kill my converters, since i will probably never need a pad for an output from my interface) And if I do want one, will I want it to be before the THAT1200, or after?
As of now, the order I have come up with is
TRS--->PAD--->Polarity Reverse---->THAT1200---->Line Trim of some sort.
Does that make sense?
And the next question.
I don't really mind how much the pad attenuates as long as it is inbetween 12 and 20db. I have tried using the H pad calculator here:
http://www.mcsquared.com/dbframe.htm
I would probably want an input Z of 10k or higher correct? And what about output Z to feed the 1200 (assuming it will follow the pad).
The values that I tried didn't really get useful until I had a pad of 20db. the input Z was a minimum of 10K, and that forced the output impedance to end up around 600ohms. Is that an acceptable value to feed the 1200 with?
I ideally want a pad of closer to 12db, and to make the impedances happy for a line input into the 1200. SO i guess I would like to know what max output impedence of the pad would still be cool feeding the 1200. And just to make sure, is the 10K input impedance high enough for a wide range of sources?
I'd appreciate any guidance in this matter.
I am attempting to do a little R&D for a simple mixer type thing. For recording, it would be used as basically a collection of channel strips with direct outs with routing for a cue mix. For mixing, it will be used as a normal mixer.
My question is about the input circuitry for the channel.
I want a simple line input with a pad, polarity reverse, and a line trim. I would like to use the THAT 1200 line reciever for this situation. Since the input will be fed from either a mic preamp or an audio interface, what are the odds that I will ever need a pad? (even for killing a preamp for distortion purposes and then cut the level to not kill my converters, since i will probably never need a pad for an output from my interface) And if I do want one, will I want it to be before the THAT1200, or after?
As of now, the order I have come up with is
TRS--->PAD--->Polarity Reverse---->THAT1200---->Line Trim of some sort.
Does that make sense?
And the next question.
I don't really mind how much the pad attenuates as long as it is inbetween 12 and 20db. I have tried using the H pad calculator here:
http://www.mcsquared.com/dbframe.htm
I would probably want an input Z of 10k or higher correct? And what about output Z to feed the 1200 (assuming it will follow the pad).
The values that I tried didn't really get useful until I had a pad of 20db. the input Z was a minimum of 10K, and that forced the output impedance to end up around 600ohms. Is that an acceptable value to feed the 1200 with?
I ideally want a pad of closer to 12db, and to make the impedances happy for a line input into the 1200. SO i guess I would like to know what max output impedence of the pad would still be cool feeding the 1200. And just to make sure, is the 10K input impedance high enough for a wide range of sources?
I'd appreciate any guidance in this matter.