[Superman]

There is plenty of mythology in sound reproduction.

Yes, speakers are arguably the most important single hifi component.

Tube juke boxes tended to have remarkable LF response. This should answer anyone's concerns about whether tubes have adequate LF response. Of all my stereo gear, my amps with EL84 output tubes clobber the rest in their robust LF response.

Mega-Watt SS setups often, IMHO, overdo the low frequencies. Some folks prefer to hear low frequencies that are many times louder than 'normal.' Louder than actual live performances. Subwoofers are entertaining to some folks. I don't use them.

Back to speakers: Some folks want compact size, high sensitivity/efficiency and great LF response, and you can only have two of the three. My speakers are physically large (not compact) and have high sensitivity and good LF response. 103db sensitivity, which means that with a single Watt of power, they are nearly as loud as lawn mowers. My power amp makes no more than 8 WPC.

Others prefer high-watt systems feeding low-sensitivity speakers. Pick your poison, but don't be assuming that tubes have poor LF performance, since this is just not true. I am a bass player, and my two favorite gigging amplifiers are tube amps. Overall, the most popular bass amp head over the last sixty years is a tube amp called the Ampeg SVT. In a league of its own.