Why price of Tannoy speakers from online retailers in UK is cheaper than in US


I am looking for a pair of new Tannoy Kensington GR speakers. I notice the price from many online retailers in UK is cheaper than in US.  I believe they are authorized dealers because their websites are listed on Tannoy website.  Current price in UK for a pair of Tannoy Kensington GR Speakers is 9290 pounds(approximately 12K USD). Price in US is 9K/each or 18K/pair.   If we add shipping fee and import taxes and duties, it is still significantly less than the price in US. does anyone have  experience with buying Tannoy speakers directly from UK retailers.  Your input is appreciated.
michael8853
Sea freight isn’t actually that expensive. I shipped an suv between the USA and the Mediterranean for $1100. Import tax for goods entering the USA from the UK I am unsure about. But a 6k difference between the UK price and the USA price is a lot. 
And vice versa retailers in US iare cheaper than in UK for gear imported from US to the UK there are dutties and freight costs to be paid.
@shadorne 

25% makes sense, KEF speakers sells for about 25% more in in the US than in the UK.
In the biz it's referred to as gray market buying. If you do buy that way, in the event of warranty needs you will receive no help from the U.S. distributor.