My memory isn't good to start with. Still, I could've sworn I heard substantially more bass coming out of the MartinLogan Expression ESL 13A hybrid electrostatic loudspeakers ($23,500/pair) in Planète Haute-Fidélité's room than during any other visit to the retailer's showroom in past years.
The model's bass should go low—provided by each speaker's two 10" woofers powered by a 300-watt Class-D amplifier; it's rated as being able to go as low as 24Hz. But Stygian low bass? The kind that turns into a rumbling-in-the-floorboards murmur? I…