SONKRAP 161 is a Home Brew Tone Control made by an Indonesian audiophiler since 2016. The tone control kit consists of 7 potentiometers, 6 of them are for tone processing.
Function of the potentiometers:
- Potentiometer for HIGH
- GAIN of HIGH-MID
- Freq of HI-MID
- GAIN of LOW MID
- Freq of LOW-MID
- Potensiometer for LOW
There is no explanation whether this is similar to a clone of the SOUNDCFART Mixer because the name of the PCB is similar to this famous mixer brand.
APPEARANCE OF PCB WITH NO COMPONENT
I got the PCB from LAZADA and there is a clear photo of the PCB LIKE THIS.
In the PCB printed name SONKRAP 161 but not SOUNDCRAFT. I think this PCB was a clone from one of the SOUNDCRAFT’s MIXER and the homebrew’s designer make some edit and give them name with this.
How to get this PCB’s?
You can check the link to purchase the PCB you need at these online shop:
MHL ELEKTRONIK ( CHECK PRICE),
IMAM TECH INNOVATION (CHECK PRICE),
JAYA TECH ELECTRONIC (CHECK PRICE),
AZKA JAYA ELECTRO (CHECK PRICE),
KHALIFII STORE (CHECK PRICE),
SCHEMATIC TRACING TONE CONTROL SONKRAP 161
I need about 2 hour to making the schematic diagram of this PCB by looking in the above PCB’s image.
And the result of drawing is look like this:
CLICK TO ENLARGE 2560 Px
In the schematic, this circuit uses a 4-level OPAMP, which starts from the controller HIGH tone and ends at the LOW tone.
The second OPAMP there are 2 potentiometers that serve as GAIN for LOW-HI and FREQ sweep tones respectively.
The same thing happened to the third OPAMP except that the difference was in the value of the frequency filter capacitor.
The last OPAMP works similarly to the first OPAMP, but that it works to filter out low tones only.
NOTE
The circuit uses simmetrical power supply 15VDC.
You can change the OPAMP with other low noise OPAMP such as NE5532, TL072 etc. for best result of your audio.
OTHER AUDIO SCHEMATIC DIAGRAM ON BLOGSPOT OF YOHAN CHECK THIS LINK.
ANOTHER AUDIO AND DIY / OMBRO SCHEMATIC INDONESIAN PCB OR KIT TRY THIS LINK.