Put together several pcbs operational amplifiers

[AndresTC]

Hello! Could you connect several of these to achieve greater power per channel? If so, how would I do it?

Coro 48 NE5532 * 24 ultra baja distorsion 24W Amplificador Board para auriculares estereo | eBay


I also have two of these ... could I use the 24 operational amplifiers as a single block?:

NE5532 * 24 ultra baja distorsion 12W*2 Auriculares Estereo Amplificador Board Para Estereo | eBay

Greetings and thank you very much in advance

 

[Osvaldo de Banfield]

12W for headphone is too excessive, my dear.

12W es una bestialidad, loco, te vas a quedar sordo!

 

[AndresTC]

it is to attack specifically sensitive speakers a beyma tpl 150 and beyma 6mcf200
Regards

 

[Osvaldo de Banfield]

Sensitive or INsensitive? With pair of headphones of the standard quality, 1W is more than sufficient.

 

[AndresTC]

don't mention headphones at any time jeje

they are speakers It is an active system

https://i.imgur.com/11favaJ.jpg

 

[Osvaldo de Banfield]

The first link posted says clearly:

Coro 48 NE5532 * 24 ultra baja distorsion 24W Amplificador Board para auriculares estereo | eBay

STEREO HEADPHONES. 24W for a headphone is catastrophic for your ears.

 

[AndresTC]

Regardless of that, you know if what was mentioned in the first post could be done

 

[Osvaldo de Banfield]

For assure you it, we need the data sheets with specifications of the circuitry involved.

 

[Mark Tillotson]

Firstly you ideally need 64 NE5532 opamp stages (32 packages) to drive 8 ohms with low distortion, and you can't get 24W from it, perhaps 15W.

If you wanted to bridge you'd need to double the number of stages in each half (256 opamps, 128 packages total) in order to drive 4 ohms from each half of the bridge (8 ohms bridged looks like 4 ohms to each amp) - you'd get 60W in theory. I don't think its very practical.

The opamp array amplifier doesn't scale easily due to the power rail voltage limits.

Each half of an NE5532 can drive about 500 ohms with good fidelity, but will struggle at lower impedances. This is why 64 halves are needed to drive 8 ohms.

 

[AndresTC]

Of all the amplifiers I've tried, it sounds the best, with my beyma tpl150 of 100 db 0 background noise and much less aggressive and more details and barely heats up

that's why he was thinking of increasing his power ...


So I could not join two plates of 24 to achieve at least 48 per channel?

 

[abraxalito]

Given the supply rails set the voltage limit, the only way to increase the power is to increase the current drawn - meaning you'll need a lower load impedance. You could use an output transformer to implement a voltage step-up, effectively reducing the impedance of your existing load.