Hello one and all.
My first post here, but i've been a long time reader of the forum. Without you guys I couldn't have built my Gyraf G9 Mic Pre!
Okay, so I'm really pushing my electronics ability hard recently and I'm undertaking a new project. Basically I have designed a studio monitor controller that works in a similar way to the Crane Song Avocet, but i've tweaked it so that is ideal for our studio and has some features we need. The design runs a completely passive audio path, using a relay based attenuator (with precision metal-film resistors). This attenuator runs fully balanced from input to output.
The problem is I need to put some live-room outs and headphone outs that sum with a talkback microphones signal. This requires them to have their own respective volume controls. I need to split off the passive balanced lines into these amplifiers, and I'm wondering the best way to do this without harming the passive lines transparency? If I take a feed through an op amp buffer (essentially drawing 0 current) will this have a negative effect on the passive nature of the main signal path?
Any thoughts or advice is greatly appreciated, and thanks in advance!
Edd.
My first post here, but i've been a long time reader of the forum. Without you guys I couldn't have built my Gyraf G9 Mic Pre!
Okay, so I'm really pushing my electronics ability hard recently and I'm undertaking a new project. Basically I have designed a studio monitor controller that works in a similar way to the Crane Song Avocet, but i've tweaked it so that is ideal for our studio and has some features we need. The design runs a completely passive audio path, using a relay based attenuator (with precision metal-film resistors). This attenuator runs fully balanced from input to output.
The problem is I need to put some live-room outs and headphone outs that sum with a talkback microphones signal. This requires them to have their own respective volume controls. I need to split off the passive balanced lines into these amplifiers, and I'm wondering the best way to do this without harming the passive lines transparency? If I take a feed through an op amp buffer (essentially drawing 0 current) will this have a negative effect on the passive nature of the main signal path?
Any thoughts or advice is greatly appreciated, and thanks in advance!
Edd.