Cal said:

While modern subwoofers go lower than the K-horn, they don't go as
high, putting the crossover at a place where it is audible and not
providing the natural low-midbass nothing but large horns can.

They're not supposed to go that high. One reason is that with a 12-15"
driver, an xover of 400HZ induces beaming.

SPECIFICATIONS Of LaScala Speakers:

FREQUENCY RESPONSE:53Hz-17kHz=B1 3dB
SENSITIVITY: 104dB @ 1watt/1meter
POWER HANDLING: 100 watts maximum continuous (400 watts peak)
MAX ACOUSTIC OUTPUT: 121dB SPL
NOMINAL IMPEDANCE: 8 ohms
ENCLOSURE TYPE: Fully horn-loaded
DRIVE COMPONENTS: Three-way fully horn loaded system using one 1"
(2.5cm) phenolic diaphragm compression driver and one 2" (5.08cm)
phenolic diaphragm compression driver with an exponential horn and one
15" (38.1cm) fiber-composite cone woofer with an exponential folded
horn.
TWEETER: K-77-F 1" (2.54cm) Phenolic diaphragm compression driver
HF CROSSOVER: 4500Hz
MIDRANGE: K-55-X 2" (5.08cm) Phenolic diaphragm compression driver
MID FREQUENCY HORN: Exponential Horn
MF CROSSOVER: 400Hz
WOOFER: K-33-E 15" (38.1cm) Fiber-composite cone / folded horn-loaded
DIMENSIONS: 35.5" (90.17cm) x 23.75" (60.33cm) x 24.5" (62.23cm)
WEIGHT: 123 lbs. (55.84kg)
ENCLOSURE MATERIAL: Birch Plywood FINISHES: Unfinished Birch, Birch
Lacquer, Black Lacquer
YEARS BUILT: 1963 -

And I do not prefer tube amps "at any price". I do prefer them in my
price range though.

The only possible way tube amps in the lower price ranges can sound
decent, is with the ear splitters like LaScala's, which are
104db@1w/1M. If you used better more accurate loudseakers, you could
drive them with better, more accurate, and more powerful amps, which
would easily play loud enough to match what I assume are the levels you
probably employ.

If you get off your ass and build one of Nelson
Pass' excellent designs from his website or from magazine articles you
will find them-andd a few other solid state amps-competitive in sonic
quality with tube amps. Not QSC's or Peaveys.

That would depend on which amps you are referring to.

They are still inferior to any decently built SS amp.

The QSX amp that Arny uses is a model no longer made by them and does
not use a fan.

Peavey build their amps in the same way as any other consumer amp, sans
heat sinks.
They can hold their own against any other SS amp and blow the doors off
most tube gear.