I want to share the amplifier schematic designed by Mr. Iwan Kamil. Hopefully, you like it 🙏.
According to Mr. Iwan Kamil, this schematic shows a "Stereo Amp Full Range 80 Hz—5.5 KHz" equipped with a bandpass and bias control set. Those who follow Mr. Iwan Kamil on social media (Facebook) must be familiar with the functions of these components. See the schematic in pdf no. 1.
Maybe some people think that this schematic is simple, just an ordinary OCL. However, for me, this schematic is very authentic. Each circuit has its own uniqueness. Please share with your friends to be creative with this schematic.
For the op-amp supply, you can refer to Mr. Iwan Kamil's tutorial on "Super Low Noise DC Supply" or use the references I have attached. see picture No. 5.
For capacitors C1 and C3, it is better to use tantalum or other types of good quality so that the signal is more linear. Resistors R15, R16, R27, and R28 can be replaced with 220 Ohm if using a 24 VAC CT supply.
Let's use this group as a place to discuss and share knowledge about DIY Audio.
Thank you.
According to Mr. Iwan Kamil, this schematic shows a "Stereo Amp Full Range 80 Hz—5.5 KHz" equipped with a bandpass and bias control set. Those who follow Mr. Iwan Kamil on social media (Facebook) must be familiar with the functions of these components. See the schematic in pdf no. 1.
Maybe some people think that this schematic is simple, just an ordinary OCL. However, for me, this schematic is very authentic. Each circuit has its own uniqueness. Please share with your friends to be creative with this schematic.
For the op-amp supply, you can refer to Mr. Iwan Kamil's tutorial on "Super Low Noise DC Supply" or use the references I have attached. see picture No. 5.
For capacitors C1 and C3, it is better to use tantalum or other types of good quality so that the signal is more linear. Resistors R15, R16, R27, and R28 can be replaced with 220 Ohm if using a 24 VAC CT supply.
Let's use this group as a place to discuss and share knowledge about DIY Audio.
Thank you.
Attachments
Translation:
If you want to see an explanation of this amplifier video, you can check the video here
If you want to see an explanation of this amplifier video, you can check the video here!
Post in thread 'Stereo Amp Full Range Sch by Mr. Iwan Kamil' https://www.diyaudio.com/community/...ange-sch-by-mr-iwan-kamil.424124/post-7935311
Post in thread 'Stereo Amp Full Range Sch by Mr. Iwan Kamil' https://www.diyaudio.com/community/...ange-sch-by-mr-iwan-kamil.424124/post-7935311
thanks for the suggestion, if you think it's unsuitable that's okay. you can open the explanation on the YouTube link that I provided. this scheme is only half of the overall design. the design is made for design 2.1. and why did I write 80hz-5.5khz? because the creator of this scheme said so, I respect the designer or creator of this scheme even though I'm not sure that this really works in the 80-5.5khz range. thanks
hello Amplitude nice to meet you. if you think this is Perfect amp for voice only that's okay. i will send the progress video in my thread that this can be used to play music, just wait. thank you for sharing your opinion here 🙏
yes I agree with your opinion, if we look at the frequency range that I wrote. actually this scheme has been tried by many people in my country and I have heard the sound recording, and it sounds good. in our country there are many local DIY Audio groups, although actually I am not fully sure whether the circuit really works at 80-5.5khz because I have not done actual measurements with proper measuring instruments.
I would be interested why the designer deliberately limited the frequency range to roughly voice only.
There is filtering in the amp to obtain this. If you remove the filtering you have a nice wideband audio amplifier useable for hifi.
So why would the designer do this? He is obviously not stupid so what was his aim?
Jan
There is filtering in the amp to obtain this. If you remove the filtering you have a nice wideband audio amplifier useable for hifi.
So why would the designer do this? He is obviously not stupid so what was his aim?
Jan
Hello Mr. Jan
Based on the video from the designer, the frequency range of 80-5.5KHz is the range of sound that can be naturally heard by the human ear. For example, sounds like wind blowing, waves, or other natural sounds have frequency ranges that are not far from this range. Frequencies that are too high or too piercing can sound unnatural and unpleasant. This is just one opinion, and I recommend asking the designer directly for more information. The video link has been shared in this thread. YT Mr. Iwan Kamil
It is worth noting that this schema represents a half-schema of the complete 2.1 system.
Based on the video from the designer, the frequency range of 80-5.5KHz is the range of sound that can be naturally heard by the human ear. For example, sounds like wind blowing, waves, or other natural sounds have frequency ranges that are not far from this range. Frequencies that are too high or too piercing can sound unnatural and unpleasant. This is just one opinion, and I recommend asking the designer directly for more information. The video link has been shared in this thread. YT Mr. Iwan Kamil
It is worth noting that this schema represents a half-schema of the complete 2.1 system.
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It is "full range" only if you exclusively listen to AM radio, but then, why stereo?
A pretty standard opamp based power amp combined with a bandpass filter and an absurd title. And some little added weirdness like electrolytic caps bypassed with equal value non polar caps or the extreme voltage gain.
A PA amp perhaps?
A pretty standard opamp based power amp combined with a bandpass filter and an absurd title. And some little added weirdness like electrolytic caps bypassed with equal value non polar caps or the extreme voltage gain.
A PA amp perhaps?
What do you think? Do you agree?
Do you think that 'bandpass' and 'full range' in the same sentence makes any sense?
Jan
I actually don't fully agree, because the scheme has been simulated by our friends in the local group, but we will never know before trying it directly and listening to it directly. I will update the progress and I will inform you here as it is according to what I practice.