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series connection of power audio amplifier

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Hello
I intend to use this IC CM102S, which is a USB audio with built-in amplifier 2W

1651903256526.png



I need more power so I want to use another amplifier , somethink like 10 W - PAM8106

1651903962195.png



My question is : could I connect in series these two amplifiers : the output of CM102 to be connected to the inputs of PAM8106
 

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Hi,

The CM102 darasheet isn't very detailed. I miss a lot of informations.
* like output type (class)
* output offset voltage
* speaker connection
* application note
...

So it's a lot of guessing.
* I'm rather sure it's a classAB or classB output. Thus you should be able to connect an external amplifier.
* it will have DC offset you have to get rid of with a series capacitor
* I recommend to connect the "-In" of the power amplifier to CM102_VRef to avoid loud "plop" on powerON.

Klaus

Added: Don't try to build the power amplifier on a breadboard. You need a proper PCB layout. Read datasheet and application notes.
 

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The output level of the CM102S is only 0.18W into 8 ohms per channel, headphones level.
The output of the PAM8106 amplifier is 6W into 8 ohms per channel with low distortion and a 12V supply.
The PAM8106 has 32 pads that are almost impossible to solder.
 

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Audioguru said:
The output level of the CM102S is only 0.18W into 8 ohms per channel, headphones level.
The output of the PAM8106 amplifier is 6W into 8 ohms per channel with low distortion and a 12V supply.
The PAM8106 has 32 pads that are almost impossible to solder.
Click to expand...
.18w=> 1.2V. Probably enough to drive the PAM8106 (I didn’t look that closely). Might be able to use different load resistor for CM102.

PAM8106 is not ”impossible to solder”. You just the proper tools.
 

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Audioguru said:
The output level of the CM102S is only 0.18W into 8 ohms per channel, headphones level.
The output of the PAM8106 amplifier is 6W into 8 ohms per channel with low distortion and a 12V supply.
The PAM8106 has 32 pads that are almost impossible to solder.
Click to expand...

Soldering it is not an issue for me, but thank you
--- Updated ---

barry said:
.18w=> 1.2V. Probably enough to drive the PAM8106 (I didn’t look that closely). Might be able to use different load resistor for CM102.

PAM8106 is not ”impossible to solder”. You just the proper tools.
Click to expand...
I have found a similar IC, from all mighty TI PCM2704C which also can drive headphones but also can be connected to external power amplifier, they warn about mathcing input impedance of amplifier

1653054857549.png


But PCM output is directly the DAC itself
CM102s output is amplifier

Is my feeling right that it could work?

What could happen if impedances are not matched? How to match them ? If I choose any (not really any) amplifier, can I match the ICs with RLC parts?
I know I have serious knowledge gaps in electronics, so please bear with me :)
 
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