Historically, I'd argue that British speakers did have a "house sound" relative to typical US speakers. At least they did back in the '70s when Kef, B&W, Celestion et. al first appeared on the US scene. JBL and a few other large US firms had popular products with deep bass and hot treble that were attention getters on first listen. They'd "pop" at audition, but wren't necessarily particularly neutral tonally.
The Brit speakers were mostly monitors, had less bass extension (and often a corresponding treble roll-off) than a typical US design, and were prized for mid range performance (possibly because there was less deep bass). British (and European) rooms are generally smaller than US rooms, so this probably made sense at the time.
Then two things began to happen:
Several US manufacturers - Advent among them - began to de-emphasize one or both frequency extremes. That neutral Brit sound was no longer mainly a Brit phenomenon as the JBL sound didn't dominate the US market in the way it once did. Conversely....
As fat profit margins started to accrue to larger, more full range designs, the Brits started building bigger, more full-range products. The gap was narrowed from both sides. Today, I hear much less national difference between the products from the US and GB than I did back in the day.
Just MHO.
The Brit speakers were mostly monitors, had less bass extension (and often a corresponding treble roll-off) than a typical US design, and were prized for mid range performance (possibly because there was less deep bass). British (and European) rooms are generally smaller than US rooms, so this probably made sense at the time.
Then two things began to happen:
Several US manufacturers - Advent among them - began to de-emphasize one or both frequency extremes. That neutral Brit sound was no longer mainly a Brit phenomenon as the JBL sound didn't dominate the US market in the way it once did. Conversely....
As fat profit margins started to accrue to larger, more full range designs, the Brits started building bigger, more full-range products. The gap was narrowed from both sides. Today, I hear much less national difference between the products from the US and GB than I did back in the day.
Just MHO.