For example: It takes a woofer slightly longer to deliver a big bass note than for a tweeter to deliver the corresponding high; the gap can be up to 28 milliseconds. Okay, that’s not very long but the DSP corrects for it so the low and high ends each reach your ears at exactly the same moment. I listen to a track by London Grammar called Hey You that’s underlined with a hugely powerful bassline. I’d normally expect this to muddy, if only slightly, the strident vocals of Hannah Reid, who’s soaring through the upper mids. But both are reproduced with perfect equality. It’s flawless, even turned up so loud I can barely hear the salesperson beside me.

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Okay, something more serious; the final movement of the Shostakovich fifth. From commanding bass it goes to extreme delicacy with a lone violin supported by solos from various other instruments around the room, mostly cellos and basses. It gets so soft, so delicate that a lightly struck triangle is easily discernible. Then suddenly the bass, there’s no other word for it, explodes. But the top end is just as aggressive. There are room-shaking lows while the highs remain clear and pristine. The Meridians reproduce all this with an ease that borders on nonchalance.

I finish with the Benedictus from The Armed Man by Karl Jenkins, seven and a half minutes of pure bliss. A deeply emotional violin solo at the start, then the choir comes in, female and male in turn and then together, delicate and fragile. Maybe two thirds through comes what I’m waiting for, eyes tightly shut. There’s a blast of energy that in a single moment sends everything and everyone to full stretch.

This is my wow moment. It blows me away because the soundstage in this highly damped room rips right through the walls and flings itself out into surrounding postcodes. I’m astounded, it’s beyond anything I’ve heard from this track before. The woman sitting beside has been demonstrating hi-fi for years and she’s shaking her head in disbelief. “The airiness of these speakers in this room… remarkable,” she says.