DIY 2.1 amp from parts as a beginner: bad idea?

[wwwill]

Hello everyone,
Here is the situation in a few words :

• I just want to have a slightly better sound when watching TV and being able to listen casually some music in Bluetooth
• I have been given 2 small speakers Yamaha NS-E7900 (40W - 6ohms) and a subwoofer Sony SS-WS53 (??W - 1.5ohm)
• I am not an audiophile, I just don't want pops and hisses
• I don't want to listen to music or TV loud, I don't particularly hate my neighbors and they don't particularly hate me either, so I would like this to continue
• I studied electronics, I have some equipment, but I have never played with audio before
• I live in Taiwan and I have easy access to Aliexpress, Taobao (equivalent to Aliexpress but for China only), Alibaba, etc

So putting all together, I have been searching for a solution for a 2.1 amp that would be compatible with my 1.5 ohm sub. Not easy.
According to my research, the TPA3116D2 and TPA3118D2 can drive a speaker of 1.6ohm in PBLT.

I have a few options :

• Sure/Wondom JAB2V2+JAB3 (+FreeUSBi if needed) = 62 USD with cables
• Sure/Wondom DSP board+Extension board + 1 stereo amp + 1 mono amp + 1 BT receiver (+FreeUSBi) = 40-50 USD
• Midiworx ADAU1701 with BT + 1 stereo amp + 1 mono amp (+FreeUSBi) = 30-40 USD
• Arylic Up2Stream 2.1 amp (+their software at 20USD ?) (but given for 2 ohms min) = 119 USD
• Tinysine TSA7500 (but no way to set the get an equalizer) = 65 USD

For the mono amplifiers, I have seen quite a few in TPA3116D2, such as :

• XH-M542 (100W mono) for 3 USD ?
• XH-M544 (150W mono) for 4.1 USD ? (no impedance noted)
• Unisian (150W mono) for 15 USD (4 ohm impedance min ?)
• Sanwu 2x50W that can be set in PBTL 100W for 12 USD

It is about the same for stereo amplifiers.

So here are my questions :

1. Which route would you go for ?
2. Is it as simple as putting the elements together ? I don't mind soldering etc, but if there is any passive components, I don't know how to pick them.

Thank you very much for reading all of it. Sorry if these questions look stupid, but I have already spent countless hours on this forum and others, reading everything that may be relevant including cryptic datasheets (some in Chinese for BT modules...) and I am still not sure of how to approach this.

 

[wwwill]

I forgot one option :

• Tinysine TSA1701 Audio DSP Board + 1 stereo amp + 1 mono amp + 1 BT receiver (+FreeUSBi) = 40-50 USD

(Is it not possible to edit my original message ?)

 

[NareshBrd]

See Indian sites, 2.1 kit from TDA 2030 (fake / good quality Chinese chips), populated PCB starts about $2.
All you need is a transformer, and a few pots.
FM module is $1.25 or so.
And of course the cabinet for all this.
Assembly is less than two hours, minimal soldering needed.

$10 tops, without shipping.