Hello friends, I have acquired a music center which has 3 LM 1875/TDA 2030, one for the sub and the two satellites. It has volume, bass( sub level) and treble ( that comes handy for certain records...err..streams ) plus a 2 mics&echo control ( yes, the karaoke feature).
The subs that I built this summer come handy too. The little satellites that I built purposely for my BT thingy are 16 Ω ( they are useful for the tube amp, though they lack bass ) and with the class D amps of the BT thingy they perform ok (the BT thingy doesn't do highpass for the sats).
Now...I have acquired a Sony portable radio/CD/cassette player that incorporates those convex speakers.
I have two ex-speaker membranes from which I made two 8 waveguides.
The convex speakers are 3.2 Ω
The midwoofers are 6 Ω
I have some coils & caps laying around, so a series filter was made. 6.8uF + 2 mH ...sounds good.
Ok, to be finished...but don't have time! Jocking...just deciding what to do ( throw everything in the garbage! No, that's where it comes from...!)
The subs that I built this summer come handy too. The little satellites that I built purposely for my BT thingy are 16 Ω ( they are useful for the tube amp, though they lack bass ) and with the class D amps of the BT thingy they perform ok (the BT thingy doesn't do highpass for the sats).
Now...I have acquired a Sony portable radio/CD/cassette player that incorporates those convex speakers.
I have two ex-speaker membranes from which I made two 8 waveguides.
The convex speakers are 3.2 Ω
The midwoofers are 6 Ω
I have some coils & caps laying around, so a series filter was made. 6.8uF + 2 mH ...sounds good.
Ok, to be finished...but don't have time! Jocking...just deciding what to do ( throw everything in the garbage! No, that's where it comes from...!)
The best thing of this 'music center' is that it has: remote control; lights!
It has low pass, high pass (+treble control) and two dedicated chips for volume control of the 3 channels.
It's a pleasure to have a one-in+all medium- lofi consolette.
But let's talk about the speakers...because speakers...you know ( they're gonna get you!)
Those ' wide dispersion convex cones' are most flattish, the magnet is inside the basket. Today I found one that emitted strange sounds, yes it resonated badly, so I put two felt pads (1x0.5 cm) between the basket and the cone, so to block any insurgent vibration...and it worked!
It has low pass, high pass (+treble control) and two dedicated chips for volume control of the 3 channels.
It's a pleasure to have a one-in+all medium- lofi consolette.
But let's talk about the speakers...because speakers...you know ( they're gonna get you!)
Those ' wide dispersion convex cones' are most flattish, the magnet is inside the basket. Today I found one that emitted strange sounds, yes it resonated badly, so I put two felt pads (1x0.5 cm) between the basket and the cone, so to block any insurgent vibration...and it worked!
Yeah, that I was saying from ten years...however...look in the back! The metal die cast horn of those tweeters is very nice.
Those are the 16 Ω satellites...now resting.
And here's the beautiful consolette! ( I like the name, it sudden came to my mind yesterday)
Found a scan that I did one week ago while investigating on the thingy. The big black chip has another one just just aside ( they must be the analog multiplexer switches ) . On top the 7805 and 7809 regs. In the bottom, two of the 3 chip amps. A transistor mutes them ...you see the little critter just before pin 1 of each chip. Ok, this is where my expertise stops, because the PCB is very little and flimsy ( the traces) , so by simply adding speaker outputs instead of RCA's ( yes, it got RCA outputs) I was risking of making a mess. Guess if I want to make preamp outputs, I would destroy the thing-
the power chips don't have standby so I should move 'em out but, no, I think I mantain the thing as is ( finger crossed...)
Those are the 16 Ω satellites...now resting.
And here's the beautiful consolette! ( I like the name, it sudden came to my mind yesterday)
Found a scan that I did one week ago while investigating on the thingy. The big black chip has another one just just aside ( they must be the analog multiplexer switches ) . On top the 7805 and 7809 regs. In the bottom, two of the 3 chip amps. A transistor mutes them ...you see the little critter just before pin 1 of each chip. Ok, this is where my expertise stops, because the PCB is very little and flimsy ( the traces) , so by simply adding speaker outputs instead of RCA's ( yes, it got RCA outputs) I was risking of making a mess. Guess if I want to make preamp outputs, I would destroy the thing-
the power chips don't have standby so I should move 'em out but, no, I think I mantain the thing as is ( finger crossed...)