Unfortunately I'm moving and won't need these, though I have bought a pair of their baby brothers - the 1 Series 104 for my main computer. The LSR305 packs a punch way above its price range. Are bi-amped: They have two amplifiers in each speaker - one for the tweeter and one for the 5 mid-bass driver. Each speaker has its own 50W amplifier. These speakers are going back into their original boxes and will be ready for collection.The item "JBL LSR305 pair of 5 powered studio monitors" is in sale since Monday, December 23, 2019. This item is in the category "Musical Instruments\Pro Audio Equipment\Speakers & Monitors". The seller is "geofflowther" and is located in Maidenhead. This item can't be shipped, the buyer must pick up the item.