Circuit Stereo Preamplifier With IC TDA1524A – Tone Control Unit

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Stereo preamplifier circuit based on the Integrated Circuit TDA1524A. Contains components for amplification and pre Tone controlling. The signal processing is done by the voltage controlled TDA1524A. This manufactured by Philips IC (NXP) Semiconductors, allows for tone control voltage and can be used in more complex designs using microcontrollers. Here we use linear potentiometers to control tone, volume and balance. The circuit is completed with the source and the suggestion of the printed circuit board, to facilitate assembly. Ideal circuit to be complemented by the power amplifier circuit posted here on the blog.

Description of pre tonal circuit with IC TDA1524A Stereo – With adjustment Bass, Treble, Balance,  Volume and Loudness

The circuit TDA 1524 has a 20DB gain and control tone +-15dB, if you prefer to mount it in a DIP socket 18 to facilitate maintenance.

The power supply uses a transformer 12V/250mA to regulate the voltage at 12 volts using a IC 7812T (any prefix). If using on a project that already has amplifier and a power supply, you can omit the transformer, diodes and replace by the 4700μF capacitor by a 470 or 1000μF . The LED used to indicate the active state of the circuit can also be omitted if you prefer.

S1 in the connector is to be connected to key loudness, and works well with the key turned to the R2 circuit is disabled, if you want to use this feature, simply connect a jumper in place so that the resistor R2 (2.2K) stay connected to the circuit.

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Schematic of the preamplifier with tone control and Volume

Preamplifier Stereo Tda1524A Bass Treble Schematic
Preamplifier Stereo Tda1524A Bass Treble Schematic

Suggested of the printed circuit board for the preamp with IC TDA1524 – Bass, Treble, Balance and Volume

Preamplifier Stereo Tda1524A Bass Treble Pcb Layout
Preamplifier Stereo Tda1524A Bass Treble Pcb Layout
Preamplifier Stereo Tda1524A Bass Treble Pcb Layout
Preamplifier Stereo Tda1524A Bass Treble Pcb Layout
Preamplifier Stereo Tda1524A Bass Treble Pcb Silk
Preamplifier Stereo Tda1524A Bass Treble Pcb Silk

List of components for assembly circuit TDA1524A tone control with Bass and Treble

Parts Value
Resistor’s 1/4 Watt 5%
R1 1.2K – Brown, Red, Red, Gold
R2 2.2K – Red, Red, Red, Gold
R3, R4 4.7K – Yellow, Violet, Red, Gold
R5, R6 220 – Red, Red, brown, gold
C1 4700µF/35V – Electrolytic Capacitor
C2, C4, C5, C6, C7, C8, C20 100nF – Polyester Capacitor
C3, C13, C14, C15, C16 10µF/25V – Electrolytic Capacitor
C9, C17 47nF – Polyester Capacitor
C10,C18 15nF – Polyester Capacitor
C11, C12 10nF – Polyester Capacitor
C19 100µF/25V – Electrolytic Capacitor
D1, D2, D3, D4 1N4004 or equivalent – rectifier diode
IC1 7812T – Positive voltage regulator 15 Volts
IC2 TDA1524A – Integrated circuit with volume and tone control Philips (NXP) Semiconductors
IN Input Connector Stereo Audio
AC Connector to the transformer
OUT Connector for Stereo Audio Output
J1 J12MM – Jumper 12 mm piece of wire.
Trafo Transformer 12 Volt
P1, P2, P3, P4 50K or 47K Linear Pot-
S1 Switch for Loudness
Welding, Wire, Cash for housing circuit, printed circuit board, the IC socket, fuse, etc..

Download PDF files for this project: PCB, Silk, Layout, Layout components, Datasheet TDA1524A, TDA1524A Eagle Library.

Download PDF

See Amplifier circuits

Buy TDA1524A IC from Aliexpress

Buy Tda1524 Tda1524A Original Preamp Tone Control
Buy Tda1524 Tda1524A Original Preamp Tone Control

Download BBox – crossover filter calculation, and more

Download E-book CMOS Logic Data – ON Semiconductor


55 thoughts on “Circuit Stereo Preamplifier With IC TDA1524A – Tone Control Unit”

  1. Hi,
    Is this circuit compatible with your TDA7293 Power amp? Do i need preamplifier berwen them? (Input And output resistences)
    Thanks in advanced.

  2. Hello I was just wondering what are the dimensions for the PCB? Also would this pre amp work well with the 200 watt power audio amplifier using the TDA 7293?

  3. Circuit Stereo Preamplifier With IC TDA1524A – Tone Control Unit
    Works very fine for one hour and then IC blown off what may be the problem. I can not figure it out I purchased two IC and those are blown after working perfectly for two hous what may be problem I am Confused please help

  4. Hi tony, iam sunand from India..I don’t know English fluently please adjust my language…. I love electronics. your circuits are very helpful for all…iam a cancer surviver. Now I wish to open an electronics shop mainly deales with audio related items.. Such as 5.1 home theaters with simple prologic effect by using 2399 op amp ic in surround speakers inputs and make small delay effect by producing with sterio input signals. Mainly tda2030 ic is used in 5 channel for each channels with the power supply of 12-0-12 transformer.and tda 7294bridge circuit for subwoofer with 24-0-24 transformer and bass- treble circuits using lm324 12inch sub using 240 and 9240 MOSFET circuit using 27-0-27 transformer…this is the basic circuits used in 5.1 systems with the coordinates of switching board for change the input modes like TV ,USB and DVD and an additional switch for DTS and prologic mode changing.and control board for controlling the volume for each channels and bass treble and subwoofers. This system is more complicated for production.. How I can make this system easyly end defectively?? And another product is automotive amplifiers here we are make car sterios with using 4440ic and 7377bridged mode with the preamp using lm324 for b-t can make car sterios with high performance with bass treble control.??? With another methods?? Next item is car subwoofer amplifier.. Sir how to make the car subwoofer amplifier like bass tube comfortable type cheaply?? With any 12v ic or any transistors?? And an another product is karaoke systems. Sir how to make a good karokke system ?? For this system contains a pre amplifier with bass treble control, volume,echo and delay controls for common mic and music input adjustments..please suggest a pre amplifier circuit for me??? And this portable karaoke system is using in amp section by using TIP127 AND TiP 122 please suggest another method you have?? Sir kindly help me …I hope you help me to indroduce the new electronic technologies and your ideas for me..please help me consider as like your brother to cach up my dreams.. The Chinese cheap products are control our electronic market..I wish to produce this items own..please help

    • Hi,
      I assembled your tone controlller circuit but the volume does not controls also the balance control does not work properly
      Can you clear it out for me ?

    • Hi Kenj
      100nF = 104 or 0.1
      15nF = 153 or 0.015
      47nF = 473 or 0.047
      10nF = 103 or 0.01
      If you do not find polyester, try with ceramic capacitors

  5. This is exactly the kit I was looking for.
    I used a stereo transmitter out of a second hand
    Sennheiser cordless headset and the receiver out of the headset in a small plastic cabinet included a 2 x 5 watt
    amp and 2 coomunication-speakers for my almost deff
    father. Now he can hear the television without problems
    with our neighbours. He sits in between the speakers.
    But I had to make a volume control connected by a cable
    of about 4 meters. A voltage-controlled pre-amp is then
    the solution to avoid hum.
    But where to buy the kit???
    I already downloaded the layouts ans I have the parts here.
    But I am not able to make the print.Who can and will help me . Just the print will do. I can drill the holes.
    I saw an shop in South Africa but the charce 40 dollar ans 9 for postage. Here in holland is no shop who sells the kit
    even not in Germany. Please help me.
    Cor den Hollander
    Rotterdam Holland


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