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Sparky661:
Hello everyone. Complete rookie here. I am attempting my first project and am struggling to find some answers. I want to take the guts of an alarm clock and put them into a cool looking tin box to make a customized radio. This means upsizing the speakers.
My question is, what in the already completed PCB must also be upsized?
I am putting in a bigger pot and adding a 7W PA. Anything else?
Oh, do I match the pot size with speaker size in ohms?

w2aew:
Assuming that you are referring to the volume control pot, you probably don't need to change it. Volume controls are typically designed before the final amplification stages, so they are not subject to the high power the speakers see.  If you are adding a separate power amplifier, you can likely still use the existing volume control to adjust the radio's output in order to control the volume coming from the new PA.

james_s:
I would probably try to pick off the audio signal from the existing volume control. You might even find that the original amplifier is adequately powerful with reasonably efficient speakers anyway though. Larger speakers can be more sensitive than smaller ones and actually require less power to make more sound. A lot of speakers designed to handle a lot of power are not very sensitive at all though. If you can find the specs it will normally be in dB/W.

Audioguru again:
My clock radio had a tinny-sounding 3" speaker. It produced no bass sounds and its screech was loud but most music and voices were not loud.
I increased the value of its output coupling capacitor and connected it to a speaker I bought that had a 6.5" woofer in a sealed enclosure and a poor quality tweeter.

I calculated then added a port on the enclosure for the woofer and I added a hifi tweeter. I added a good crossover network.
Now it sounds louder and clearer with good bass and treble.

Sparky661:
Thank you for the reply.

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