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Think of it this way:
The SET Amplifier is like a singer / vocalist without a microphone, and the Loudspeaker is like a space or venue in which the singer / vocalist is singing.
In a modest sized venue - the sound will be sweet because the performer can sing at their singing volume and everyone can enjoy. However, if the venue is too big - the performer has to try to sing louder - affecting tone and still not fulfilling the desired performance.
So, what you will have is a SET Amplifier that is not giving you 100% SET sound. It will be best if budget permits to get a compatible Loudspeaker.
Think of it this way:
The SET Amplifier is like a singer / vocalist without a microphone, and the Loudspeaker is like a space or venue in which the singer / vocalist is singing.
In a modest sized venue - the sound will be sweet because the performer can sing at their singing volume and everyone can enjoy. However, if the venue is too big - the performer has to try to sing louder - affecting tone and still not fulfilling the desired performance.
So, what you will have is a SET Amplifier that is not giving you 100% SET sound. It will be best if budget permits to get a compatible Loudspeaker.