But the trouble with the Yacht Boy specifically is the bass control is a simple switch which cuts the bass far too aggressively.
All the other sets of that size that I've seen have a variable bass control, luckily.
My mod involves shorting out one capacitor, which leaves it with a maximally flat response, but a pot could be used to get variable bass lift. I'm already experimenting with that...
To be honest, the sharp roll-off at 10kHz is more of a problem. I don't think the speaker has much left to give, based on a test with my Clarke Teknik EQ, so it's looking like a different speaker or a tweeter - neither option is easy or appealing right now. Still, I won't care about 10kHz in a few years time