Hello! I'm not sure where this should go, projects or homework or whatever else could fit,so I put it here.
I sort-of inherited a pair of old stereo-speakers originally belonging to a Denver MCA-50 unit from the late 90's (I believe) from my parents. Each unit has three drivers, with one being a "dedicated" tweeter (40mm dia, ish. ~1cm deep), as well as one 'sub' (80mm, ~1,5cm deep) and one mini-drive (20mm, ~0,5cm deep). Despite their age they all seem to work when given an adequate voltage.
However, there's a catch. I want to hook these into my external soundcard/mixer, which only has professional-level lineouts (+4dB) that require a high impedance load, in the area of 10-100k ohm.
I've included a sketch of the loudspeaker setup below. This is the info I have about the components
I believe that these are intended to operate at 2W (all 5 models that came after ours had 2W outputs -- ours isn't marked) However, the L1 driver is marked as 3-5W. I've never worked with drivers before, so I've got no clue how to approach that. If anyone knows anything about these markings I'd be in eternal debt.
From this info (with a more certain wattage for the loudspeaker), is there any way to correctly estimate (incorrectly guess?) the 'black box' characteristics such that I can gain the output from the mixer to a good level?
My though on the amp is that I use two linked inverters, one to load the lineout properly, and then one to invert again and drive the speakers. I've done a sketch of what this might look like (EC2) -- the gain for the second amp is merely a guess, and probably wildly above what is needed. Would this be a working solution? Anything I should think of?
I sort-of inherited a pair of old stereo-speakers originally belonging to a Denver MCA-50 unit from the late 90's (I believe) from my parents. Each unit has three drivers, with one being a "dedicated" tweeter (40mm dia, ish. ~1cm deep), as well as one 'sub' (80mm, ~1,5cm deep) and one mini-drive (20mm, ~0,5cm deep). Despite their age they all seem to work when given an adequate voltage.
However, there's a catch. I want to hook these into my external soundcard/mixer, which only has professional-level lineouts (+4dB) that require a high impedance load, in the area of 10-100k ohm.
I've included a sketch of the loudspeaker setup below. This is the info I have about the components
- L1: 80mm, marked as dynamic 4 ohm, 3-5W
- L2: 20mm, no marking
- L3: 40mm, no marks.
- C: 47uF, Umax=16V
I believe that these are intended to operate at 2W (all 5 models that came after ours had 2W outputs -- ours isn't marked) However, the L1 driver is marked as 3-5W. I've never worked with drivers before, so I've got no clue how to approach that. If anyone knows anything about these markings I'd be in eternal debt.
From this info (with a more certain wattage for the loudspeaker), is there any way to correctly estimate (incorrectly guess?) the 'black box' characteristics such that I can gain the output from the mixer to a good level?
My though on the amp is that I use two linked inverters, one to load the lineout properly, and then one to invert again and drive the speakers. I've done a sketch of what this might look like (EC2) -- the gain for the second amp is merely a guess, and probably wildly above what is needed. Would this be a working solution? Anything I should think of?
