Schematic for preamplifier for sabwufer
Hi
I need a diagram and PCB for an active filter for the subwoofer amplifier: "Quasi amplifier for beginners" (of APEX Audio).
Regulated frequency of 40...120 Hz with a slope of 12...18dB.
This preamplifier that can directly to be connected to output to my stereo amplifier.
Thanks for your help
Hi
I need a diagram and PCB for an active filter for the subwoofer amplifier: "Quasi amplifier for beginners" (of APEX Audio).
Regulated frequency of 40...120 Hz with a slope of 12...18dB.
This preamplifier that can directly to be connected to output to my stereo amplifier.
Thanks for your help
Last edited:
Hi apex. I have made apex ml3 pcb. This is the result. Quality is good enough. But i had a little hum, but when i touched the casing of my amp, hum was disappear. Can you give me any advice for it. How to wiring apex ml3 correctly? I just used simple regulated power supply. Thank you very much.
Attachments
Last edited:
Hi apex. I have made apex ml3 pcb. This is the result. Quality is good enough. But i had a little hum, but when i touched the casing of my amp, hum was disappear. Can you give me any advice for it. How to wiring apex ml3 correctly? I just used simple regulated power supply. Thank you very much.
You must grounded your case (gnd from regulated psu connect to amp case)
You must grounded your case (gnd from regulated psu connect to amp case)
Thank you very much for your quick reply
In this thread I will post preamps, EQ, active x-overs, VU...
ML3 is Mic/Line XLR preamp with three band EQ +/-20dB
PCB size 100x40mm
Regards
Mr Mile,
Can you share pcb lay out in pdf format?
How to make this preamp to 4 adjustable potensio (high, mid, freq and low)?
regards
Endik
Thank you Mr. Mile,
This is my ml3 sound ok but i will add 1 potensio for mid low freq,
can some one help me?
Thank you
ImageShack® - Online Photo and Video Hosting
This is my ml3 sound ok but i will add 1 potensio for mid low freq,
can some one help me?
Thank you
ImageShack® - Online Photo and Video Hosting
An externally hosted image should be here but it was not working when we last tested it.
Thank you Mr. Mile,
This is my ml3 sound ok but i will add 1 potensio for mid low freq,
can some one help me?
Thank you
ImageShack® - Online Photo and Video Hosting
An externally hosted image should be here but it was not working when we last tested it.
Nice work sir
Dear Mile,
Is this correct Sir??
How much current it needs??
Regards
No, there is several mistakes.
Regards
Mixer
Dear Mile...
I was make a new layout of Your tone control with add a XLR con for mic input...I got a plan to make 4 ch mixer with 2 mono input and 1 stereo input but I don't know how to add effect and another block like master and balanced output...
Can You help me to make my simple mixer??
Regards
Dear Mile...
I was make a new layout of Your tone control with add a XLR con for mic input...I got a plan to make 4 ch mixer with 2 mono input and 1 stereo input but I don't know how to add effect and another block like master and balanced output...
Can You help me to make my simple mixer??
Regards
Attachments
Portable version
Mile,
Thanks for this thread!
I'm looking at this for use as a belt pack unit for a friend who plays accordion.
Two channels with all controls. Balanced input and output.
Is there a way to get this functionality with only a 9volt battery? I'm also curious how long it will work if I use two 9 volts?
Many thanks for sharing your knowledge with us.
Chris
Mile,
Thanks for this thread!
I'm looking at this for use as a belt pack unit for a friend who plays accordion.
Two channels with all controls. Balanced input and output.
Is there a way to get this functionality with only a 9volt battery? I'm also curious how long it will work if I use two 9 volts?
Many thanks for sharing your knowledge with us.
Chris
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