Hi there
There shall be no further 9% rise, the prices have already increased due to Brexit vote on Asus components such as graphics cards, motherboards etc.
What Asus are talking about is their systems, laptops, sound cards, peripherals, monitors and networking as those items were in the UK at GBP prices as Asus UK hold stock of such items, they do not bring them in from Asia/USA, well they do but months ago as these are a more stable market.
This is why products such as Asus laptops have not gone up in price, but now they will as fresh stocks come in as such items are imported by Asus typically on a 3-6 month rolling basis. So the items which did not go up, laptops, Asus PC's (we do not sell), peripherals will now go up.
Graphics and motherboards increased in price weeks ago, Asus 1080 Strix cards went up way more than 10% due to Brexit as pricing was increased beyond 10% due to lack of supply on Asus Strix 1080 product.
Other laptop brands like Gigabyte already increased and MSI will follow as well, all companies are doing it, just some are ahead of others and some are slower.
For instance Acer informed me all monitor prices will increase in August by around 10%, but right now the pricing is as it was.