My Experiment in Making a Driver from Scratch
This experiment is done as part as my study to understand in depth in building a loudspeaker's driver.
The magnet used is a neodymium with diameter = 1.5" and thickness = 0,5".
This magnet is just a regular neodymium magnet that was sold in Ebay.
The cooper wire I used is taken from a short broken cable and tied several times.
The coiled copper wire is taped as shown above
The red cable is just a 1/4" TRS cable cut half.
Without any amplification, my first experiment was sticking the magnet to a used peanut can.
Without amplification, the sound was very low, but can be heard clearly.
No recording was made on this experiment, but it's inaudible if my ear isn't covered by the can.
The next experiment I had was putting the coiled magnet to a used Godiva ice cream cup.
I hooked this straight from my Ipod without any amplification.
As seen on the picture above, the magnet is sitting on a foam and taped so it doesn't move.
The foam is cut so that the magnet is sticking out a little bit from the cup's opening.
As shown above, I attached a foam plate to the magnet and taped tightly to the cup's opening.
The foam plate is pressing the magnet to make the coupling better.
Different type of papers were used to make horns to enlarge the vibrating surface area.
No recording was made for this experiment.
The volume was still very soft, but louder compared to the peanut can before.
Different papers had different sounds.
At the end, I took all the horns away and cut the foam plate as shown above.
I used two bend paperclips to tightening the plate to the magnet.
Straight from the Ipod without amplification, the volume was still very low.
The paperclips vibrate and some midrange weird frequency can be heard.
Since I like the compactness of everything, I recorded it.
Hooked up to M-audio 410 audio interface -- Benchmark DAC-1 Digital to Analog Converter
-- ART SLA 2 power amp and recorded with a NT-5 microphone, two recordings were made.
My Tannoy Reveal 6P which is connected to a same signal flow was also recorded for comparison.
EQ was used to compensate for the room "sound" for the Tannoy recording since it was placed on the corner.
My driver sounded muddy because of the proximity effect of the microphone (as you can see at the picture),
but no EQ was used on my driver recording.