Hello, here is my problem without going into great detail, my subwoofer signal comes from a crossover which i cannot control and is set too low, somewhere around 50 Hz. I want to take that signal and sum it with the front signal which is a band pass signal from around 50Hz to 2kHz. I would now have a signal with everything from 2k Hz on down. I can then run this into my subwoofer amp and use its low pass crossover set to whatever i want, which is around 100Hz. Buying a unit that sums audio signals is stupid expensive so i looked into building something myself. everything i find on summing points to this simple circuit using op amps so i get the same level signal out as goes in. will this work for what i need it to do? I have never dealt with combining or summing so i wanted to get a second opinion before building and installing this circuit.
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Without going into a very complicated setup, the quick answer to your question is i dont have a full range signal i can send to the subwoofer.
i have the following 4 signals:
- 1 Hz to 50 Hz
- 50 Hz to 3k Hz
- 150 Hz to 20k Hz
- 12k Hz to 20K Hz
Those are approximations. Its odd i know but trust me, this is what i have to work with and in order to get that sub signal past 50 Hz, i need to sum it with the next one to gain that extra 50-70 Hz range needed to make my subwoofer sound right with stuff like rock music.
i have the following 4 signals:
- 1 Hz to 50 Hz
- 50 Hz to 3k Hz
- 150 Hz to 20k Hz
- 12k Hz to 20K Hz
Those are approximations. Its odd i know but trust me, this is what i have to work with and in order to get that sub signal past 50 Hz, i need to sum it with the next one to gain that extra 50-70 Hz range needed to make my subwoofer sound right with stuff like rock music.
it does have adjustable gain. Can you draw up something quick and post it here so i fully understand how to implement your suggestion. i am good with modifying things and that sounds like what you had in mind so a quick drawing then take a pic of it and post it here would work i believe.
Hi,
Simply connect say 10K in series with each output and
common them, with a 100K resistor to common ground.
Input impedance will parallel the 100K resistor.
If you need to use the 50Hz to 3KHz output you
need to split off the 10K feed, keeping it direct.
rgds, sreten.
Simply connect say 10K in series with each output and
common them, with a 100K resistor to common ground.
Input impedance will parallel the 100K resistor.
If you need to use the 50Hz to 3KHz output you
need to split off the 10K feed, keeping it direct.
rgds, sreten.
i will do that. Thank you very much for your help. i had no idea it was this easy. why in the world is a module that does this same thing like 300 bucks or more? they make it sound like they are splitting atoms and charge you like they were. anyways, enough of my rant, i have a modification to attend to.
thank you!
thank you!
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