Amplifier as first project

I want to get in electronics and as a first project I want to build an audio system. For the job I require a receiver(amplifier) with simple controls over bass and treble. Because I have a 12V DC adapter I would like that to be my input voltage for the amplifier. It must meet the following specifications:

- 12V Input
- Output: 8ohm 20Watt ~ 100Watt
- Short circuit protection(on the output so I don't blow my amp if the speakers short out)
- Stereo (2 inputs, 2 outputs)
- Bass, Treble and Volume controls(volume will put a simple potentiometer at the output)

So I found a circuit for bass treble control:


Now I have a question. The amplifier circuit should be placed before the input of the bass treble control or should it be situated at the input of the amplifier. Can you provide a circuit that meets the requirements for the amp(12V Input 8ohm 20W~100W Output).

Please no surface mount components. IC chips and other integrated circuits are ok. Just tell me part number so that I can search it at my local electronics shop and see if they have it in stock.

amplifier circuit is placed after pre amplifier circuit and between preamp. and amp. circuit bass and treble control is achieved.

you can also see the link below


https://www.instructables.com/id/32W-Stereo-Audio-Amplifier/

Your desired power output is a lot to expect of a single 12V rail. With a simple amplifier, the most you could get into 8Ω is around 5 watts. With a bridged amplifier, you could get up to about 18 watts. More than that and you will need to use a switching power supply to increase the supply voltage.

Better to use 4Ω speakers which will get you double the above amounts.

Here is a complete project that gives 20W per channel, including tone controls:

http://www.extremecircuits.net/2010/05/compact-high-performance-12v-20w-stereo.html

Or there are many chips, such as the TDA7375A that are designed for use in car amplifiers - the datasheet gives example circuits:

http://www.datasheetcatalog.org/datasheet/stmicroelectronics/6325.pdf