now i just need to figure out the best way to control 3 stereo lines, both independantly, and as a master volume (will be running a full active setup, so I need control over each set of speakers).
right now the only way i can figure to do this would be to use 6 of the jl units, 3 of them coupled togather for master volume, and the another 3 for idependant adjustment... any other ideas?
I'm running active 2-way's to 4 corners of my car...there is just no easy way to control the output with a 2-channel volume control.
I imagine a 2-channel, S/PDIF output going to a DAC (or a 2-channel analog output from a seperate soundcard?), from the DAC to the volume control, then back to the Line-In of the sound card, DSP, then analog output from the sound card jacks to the amps...
Would it be possible to use a stepped attenuator on the sound card output? I've done this in home audio setups but, I don't know how the fidelity would fare with the decrease in line voltage at lower volumes.
after thinking about it for a while, i really think that the jl unit is the best peice to use overall-- simply becasue it has a 5volt preamp, and a volume control.
i am not very familiar with stepped attenuators, but like you said, without a preamp, there is not very much voltage behind sound card outputs, so for any other solution to work, you would need a preamp, and then the volume control, which will get you up to the same price as the jl unit (roughly $50 each-depending on purchasing location)
for one, i wouldn't mind the $50 price tag, but i need 3-6, depending on how i decide i want to set it up(one vol control-need 3-i have a 3way active setup, and/or independant vol control for each speaker pair-would need another 3), and $50 adds up pretty quickly (my wallet checked into therapy after the original carputer build). although i really havent seen anything that compares, so, it might be one of the only active setup options under $100...