Hi,
I want to make 2 stereo gc amp in one case to drive four speakers in two different room in My house, and to have individual volume control for 2 speakers in My living room , and another individual volume control for the other two speakers located in the dining room
My Plan:
to build 4 monoblicks based on lm3875 (NI configuration) each stereo pair has its own pot for volume control
is it possible to connect these 4 monoblocks to one input source, if it is, how ? with simple parallel connection of the inputs of gc amp ? have I need to increase the input resistor of those monoblocks ?
I want to make 2 stereo gc amp in one case to drive four speakers in two different room in My house, and to have individual volume control for 2 speakers in My living room , and another individual volume control for the other two speakers located in the dining room
My Plan:
to build 4 monoblicks based on lm3875 (NI configuration) each stereo pair has its own pot for volume control
is it possible to connect these 4 monoblocks to one input source, if it is, how ? with simple parallel connection of the inputs of gc amp ? have I need to increase the input resistor of those monoblocks ?
this is a plain buffer,just add a resistor from + signal input to ground.
http://webpages.ursinus.edu/lriley/ref/circuits/node5.html fig26
With the Lm3875 at a gain of 10 add some gain. A gain of 3 would do.
fig.26
http://webpages.ursinus.edu/lriley/ref/circuits/node5.html fig26
With the Lm3875 at a gain of 10 add some gain. A gain of 3 would do.
fig.26
If it not cost, why not use two separate boxes. You can use the buffer before the pot in the amp located in main listening area. Split each output in two, one (L+R) goes to pot of main amp and the other (L+R) output at the back of the main amp. This way each amp has its own volume control. Change volume without going from room to room.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.