| thoronx |
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 ? |
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| jaudio |
| quote: | Originally posted by thoronx
Hi,
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 ? |
You can put a dual op amp buffer in front of or use two dual (one quad op amp) buffer after the pots. If using buffers after pots,least 20k pots should be used.
Use at least one power transformers per stereo pair. |
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| thoronx |
| jaudio - can You suggest some schematic for this buffer ? |
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| jaudio |
| 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. |
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