This is rather a jumble and does not make much sense- sorry. The calculations are much simpler than you thinkI am still learning the electronics, but using the calculator to decide the impedance for these speakers don't makes any sense to this project without knowing which to start the appropriate amplifier.
In Series, the calculator says for 10W, it will be 5W each at 6.4 ohm together.
In Parallel, the calculator says for 10W, it will be 5W each at 1.6 ohm on the same channel.
Yes you will need to build two amplifiers but just one power supply. One amplifier is for the left stereo signals and the other amplifier is for the right stereo signals.There are sources that says making the stereo will takes two sets of the same circuit. ( Heck, I am not sure if this apply to my project. )
You will need two amplifiers. Each amplifier must be capable of driving the 3.2 Ohm speakers at the power that you want. No resistors are needed.Does this means I need 8 ohm amplifier and pair a set of resistors to each speakers?
Yes, there are litterly hundreds of suitable circuits.This comes down to last question, so I thank you very much for going through the troubles with my mind.
Is there any circuit that I can use to build an amplifier to work with these speakers I mentioned?
Ah yes- you have an interest in electronics, just like all of us on ETO.I am looking to make from scratch if its possible to be better than schematics found online.
Beside I learn better when I do this way, but yes, I know its cheapest and higher quality to buy the smaller and premade boards.
This is why I came here hoping to pick up a circuit that is better than those 4/8ohm amplifiers that can power my 3.2 ohm speaker.
The original reason of my post is to endeavor my learning experience with electronic. Telling me to buy the premade boards for my electronic projects just don't make me feels good knowing I did learn something first before this project.
If it helps, I did built regulators and I did learned something from it. I have also built the motor controller, SSTC, HVT Driver to make jacob's ladder, and a plenty of power supplies.
Recently I recovered an abused microwave near the restaurant, and I just uncovered few awesome parts from it, especially with microwave oven transformer.
I learns new things everyday, not just from internet circuits but from you, but not just you, but from everyone. (Yes I purposed the "But" three times on purposes, lol) However, into audio field is something I have not gone into yet.
Now, please, help me with the circuit so I can build the amplifier.
Am I correct in understanding that you want a mono (Single channel ) ampifier and NOT a stereo (Two channel.) amplifier ? Using the TDA2030 IC that you have (I am asuming you will be happy to use that as you did not say it had to be built from individual transistors or even valves.) To use the TDA2030 with the two speakers they would have to be connected in series so you would be driving a 6.4 ohm load. for 10 watts into a 6.4 ohm load you would require the square root of 10 x 6.4 = the square root of 64 = 8 volts rms. 8 volts RMS would have peak voltages of +/- 1.414 x 8 = +/- 11.3 volts
You would need to allow a couple of extra volts so the output transistors did not sturate. So I would aim for +/- 13 to 14 volts. Using standard mains transformers 9 volts would be about right (9 x 1.414 = 12.7 V) So you could use a 9 - 0 - 9 transformer for both a single supply or split supply version. An 18 volt transformer could be used for the single supply version. I assume the circuits you found on the internet are the ones on the TDA2030 data sheet. What is it that you find wrong with them ? I have built amplifiers in the past using audio amplifier ICs using the circuits from manufacturers data sheets and have not had any problems.
Les.
With audio amplifiers you do not match impedances in the same way as you do a radio frequencies. An audio amplifier will have a very low outpur impedance. (Much less than 1 ohm.) All you need to wory about is not exceeding the ratings of the components in the amplifier. The TDA2030 has a maximum supply voltage of 36 volts. (You would normally aim to make sure it was a few volts below this value.) The TDA2030 also has a peak current rating of 3,5 amps so you would not want to use a load with such a low impedance that this value was exceeded. (The TDA2030 has built in limiting for this so it would not damage the chip but it would cause severe distorsion.). The question of mono or stereo depends on the source of the audio signal that you plan to amplify. Most equipment these days is at least stereo.Speaker to Amplifier at 3.2 ohm impedance matching is my problem.
... The TDA2030 also has a peak current rating of 3,5 amps so you would not want to use a load with such a low impedance that this value was exceeded. (The TDA2030 has built in limiting for this so it would not damage the chip but it would cause severe distorsion.)...
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?